Answer:
Explanation:
1) The amount of work done by Tyler is equal to the force applied multiplied by the distance over which the force is applied. In this case, the force applied is 0.5 N and the distance is 20 meters. So, the work done is 0.5 N x 20 meters = 10 Joules
2) The work done is equal to the force applied multiplied by the distance over which the force is applied. In this case, the work done is 18 Joules and the force applied is 3 N. To find the distance, we can divide the work by the force: 18 Joules / 3 N = 6 meters
3) To find the force applied by each girl, we can use the formula work = force x distance.
Yamileth: 28 Joules = force x 4 meters => force = 28 Joules / 4 meters = 7 N
Cianna: 36 Joules = force x 4 meters => force = 36 Joules / 4 meters = 9 N
Yamileth used a force of 7 N to get Mr. Williams the copies and Cianna used a force of 9 N. Therefore, Cianna used greater force than Yamileth.
Image intensifiers used in night-vision devices create a bright image from dim light by letting the light first fall on a photocathode. Electrons emitted by the photoelectric effect are accelerated and then strike a phosphorescent screen, causing it to glow more brightly than the original scene. Recent devices are sensitive to wavelengths as long as 900 , in the infrared: Part A If the threshold wavelength is 900 , what is the work function of the photocathode? Part B If light of wavelength 600 strikes such a photocathode, what will be the maximum kinetic energy, in , of the emitted electrons?
The work function of the photocathode is 1.38ev., The value of maximum kinetic energy is 1.174 ev.
Work function = hc/λ
Where h = plank's constant
c = speed of light
λ = wavelength of light
⇒ (6.63 × 10⁻³⁴ × 3 × 10⁸) / 900 × 10⁻⁹
⇒ 1.38ev ......(1)
∴ The work function of the photocathode is 1.38ev.
Max Kinetic energy = hν - hν₀
From (1)
⇒ 1.38 - 6.63 × 10⁻³⁴ × 3 × 10⁸ / 600 × 10⁻⁹
⇒ 1.38 - 0.33 × 10 ⁻¹⁹
⇒ 1.38 - 0.206ev
⇒ 1.174 ev
The value of maximum kinetic energy is 1.174 ev.
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A certain electric dipole consists of charges + and − separated by distance , oriented along the -axis as shown in the figure. Find an expression for the magnitude of the electric field of the dipole at a point far away in the -direction, a distance away from the midpoint of the dipole. Assume that is much greater than . Enter your answer in terms of , , , and 0.
I've seen other questions like this but the answers are coming back as incorrect or they have it with k included. Please help!
The magnitude of the electric field of the dipole at a point far away in the -direction, a distance away from the midpoint of the dipole is given by
|E| = |-(p * k) / r^3|
What is magnitude of the electric field?Generally, The electric field of an electric dipole at a point far away from the midpoint of the dipole is given by the following expression:
E = (p * k) / r^3 * (3 *cos(theta) * i^ + sin(theta) * j^)
where:
p is the magnitude of the dipole moment, equal to q * d (q is the charge and d is the distance between the charges)
k is the Coulomb constant (9 x 10^9 N * m^2/C^2)
r is the distance from the dipole to the point where the electric field
is being calculated theta is the angle between the vector pointing from the dipole to the point where the electric field is being calculated and the dipole moment vector (in this case, the -axis) i^ and j^ are the unit vectors in the x and y directions, respectively.
Since the dipole is oriented along the -axis and the point where the electric field is being calculated is far away in the -direction,
theta = pi and the expression for the electric field becomes:
E = (p * k) / r^3 * (3 *cos(pi) * i^ + sin(pi) * j^)
E = -(p * k) / r^3 * (i^)
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shows the interference pattern obtained in a double-slit experiment with light of wavelength 2λ.
Enter the letter(s) Indicating the fringe(s) In alphabetical order.
The interference pattern obtained in a double-slit experiment with light of wavelength 2λ with an intensity ratio between the bright and dark fringes.
What happens to the double-slit pattern as the wavelength is increased?Due to the dependence of the spacing between the slits on L, the spacings between various fringes get smaller as the distance between them gets bigger. The space between various fringes grows as the light's wavelength rises because this is a wavelength-dependent property.
What kind of pattern does a double-slit create?The double-slit experiment shows that light is a wave and creates an interference pattern. The interference pattern is made up of alternate black and light lines; the light lines are known as fringes.
What is the interference pattern?An interface establishes the communication barrier between two entities, in this case two pieces of software, as well as defining the signature actions of an entity.
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If there is going to be a total lunar eclipse tonight, then you know that:
If there is going to be a total lunar eclipse tonight, then you know that:
the Moon's phase is full.
the Moon's phase is new.
the Moon is unusually close to Earth.
The correct option about total lunar eclipse is that the moon's phase is full and the moon is unusually close to Earth.
Moon is also known as satellite of earth and revolves around the Earth. Earth is the planet that revolves around the sun. When the moon is unusually close to Earth such that it crosses the Earth's orbital plane, it is results in lunar eclipse.
The mentioned two points in answers the conditions that must be fulfilled for a lunar eclipse to occur.
The condition of moon phase to be new is important and required in the case of solar eclipse. Another required point is close proximity of moon and earth as stated above for lunar eclipse.
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7) A 2 kg cart rolls down a frictionless ramp. It starts with 58.8 J of energy at the top of the ramp. How fast would the cart be moving when it is halfway (in height) down?
Answer:
The problem is asking one to assume that the potential energy at the top of the ramp is 58.8 J and the potential bottom is zero:
then 1/2 m v^2 = 29.9 J or 1/2 the energy - one cannot solve for v without knowing a value for KE
v^2 = 58.8 / 2 = 29.9
v = 5.47 m/s
(if the cart had any KE at the top of the ramp then one cannot solve the problem because the speed of the cart is not defined)
If two city buses are traveling at 24 miles per hour and the buses are the same model and year but one bus has 30 passengers while the other bus has 12 passengers. Which is the best prediction?
If two city buses are traveling at 24 miles per hour and the buses are the same model and year but one bus has 30 passengers while the other bus has 12 passengers. the best prediction is that the bus with 12 Passengers will cover those 24 miles with faster speed than the other.
What is Speed?Speed means, the rate by which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined.
Miles:mile, any of several distance measurements, such as the statute mile (5,280 ft) (1.609 km). It generally derived from the mille passus, or "thousand paces," of the Romans, which was equivalent to 5,000 Roman feet.
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Answer:
1. What does an object's kinetic energy depend on?
its mass and speed
2. Two city buses are traveling at 24 miles per hour. The buses are the same model and year. One bus has 30 passengers. The other bus has 12 passengers. Which is the best prediction?
The bus with 12 passengers will have less kinetic energy.
3. A softball player hits a ball at 78 miles per hour. Then she hits a ball at 80 miles per hour. Which is the best prediction?
The ball hit at 80 miles per hour will have more kinetic energy.
4. A hawk is chasing a sparrow. At the beginning of the chase, the hawk's kinetic energy is 5.1 Joules. At the end of the chase, the hawk doubles its speed. What is the best prediction for its kinetic energy at the end of the chase?
20.4 J
5. A student rolls two marbles down an inclined plane. One marble has a mass of 4.8 grams. The student calculates its kinetic energy to be 0.0035 Joules when it reaches the end of the plane. The second marble has a mass of 2.4 grams. What is the best prediction for its kinetic energy at the end of the plane?
0.00175 J
How do I determine how much an objects weighs , their mass, and their acceleration and it’s direction from a free body diagram ?
To determine the mass, weight, and acceleration of an object from a free body diagram, you need to use Newton's laws of motion.
State Newton's laws of motion?
The first law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. The second law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. The third law states that for every action, there is an equal and opposite reaction.
To calculate the mass of an object, you can use the equation F=ma, where F is the force applied to the object, m is the mass of the object, and a is the acceleration of the object. To calculate the weight, you can use the equation W=mg, where W is the weight of the object, m is the mass of the object, and g is the acceleration due to gravity. To calculate the acceleration of the object, you can use the equation a=F/m, where F is the net force acting on the object and m is the mass of the object. Finally, to determine the direction of the acceleration, you can look at the arrows in the free body diagram that represent the forces acting on the object.
Therefore, we determine how much an objects weighs , their mass, and their acceleration and it’s direction by using Newton's laws of motion.
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Look at the screenshot and choose the correct statement from the options given.
Answer:
The force between two magnetic poles will increase as their separation is increased.
A young boy of mass 45 kg is standing at rest on a stationary skateboard of mass 2.5 kg. He loses his balance and flies off the skateboard with a velocity of -2.8 m/s. What is the "recoil" velocity of the skateboard?
A young boy is standing at rest on a stationary skateboard. He loses his balance and flies off the skateboard, then the "recoil" velocity of the skateboard is calculated as 50.40 m/s.
What is recoil velocity?When you fire bullet from gun, then gun experiences a force in the backward direction. Because of this force, gun attains velocity in the backward direction and this velocity is known as recoil velocity.
Given; v1, velocity of boy = -2.8 m/s ands m1, mass of boy = 45 kg and m2, mass of skateboard is 2.5 kg
Let v2 be recoil velocity of skateboard
As, m1u1+m2u2=m1v1+m2v2
u1=0; u2=0( given boy and skateboard at rest initially)
So,0=m1v1+m2v2
Hence, recoil velocity v2= -(m1/m2)v1.
= (- 45/2.5 )* -2.8
= 50.40 m/s
The "recoil" velocity of the skateboard is 50.40 m/s
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The figure(Figure 1) shows four sides of a 6.0cm×6.0cm×6.0cm cube.
Part A
What is the electric flux Φ1 through side 1?
Express your answer using two significant figures.
Part B
What is the electric flux Φ2 through side 2?
Express your answer using two significant figures.
Part C
What is the electric flux Φ3 through side 3?
Express your answer using two significant figures.
Part D
What is the electric fluxe Φ4 through side 4?
Express your answer using two significant figures.
Part E
What is the net flux through these four sides?
Express your answer using two significant figures.
The electric flux of various sides of cube are found to be - 1.558845727 N m2 , 0.9 N m2 /C, 1.558845727 N m2 /C and - 0.9 N m2 /C.
What is electric flux ?Electric flux is a characteristic of an electric field that can be conceptualised as the quantity of electric lines of force (or electric field lines) that cross a specific region. Positive electric charges are thought to be where electric field lines begin, while negative electric charges are thought to be where they end.
What is net flux?The total number of electric field lines that are perpendicular to the surface and crisscross it is known as net electric flux. Scalar quantity is used to represent the electric flux. D = E in mathematics.
Electric flux is nothing but the dot product between the Electric field vector and the area vector whose direction is given by the outward normal (indicated by the green arrows)
Area S = 0.06 x 0.06 = 0.0036 m2
a.) ? = E.S = ESCos? = 500 x 0.0036 x Cos 150 = - 1.558845727 N m2 /C
b.) ? = E.S = ESCos? = 500 x 0.0036 x Cos 60 = 0.9 N m2 /C
c.) ? = E.S = ESCos? = 500 x 0.0036 x Cos 30 = 1.558845727 N m2 /C
d.) ? = E.S = ESCos? = 500 x 0.0036 x Cos 120 = - 0.9 N m2 /C
e.) Net flux through these four sides is the sum of all the fluxes through the individual sides.
? = - 1.558845727 + 0.9 + 1.558845727 - 0.9 = 0 N m2 /C
Therefore, all the parts of questions are explained above.
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A pulley system has a mechanical advantage of 3, and an object weighing 9 Newtons must be lifted 15 meters. How much force
must be applied to lift the object?
Use the following equation to find the answer:
MA= F0/Fi
(1 point)
O 27 N
O 03 N
O 3 N
O 1.7 N
The amount of force that must be applied to lift the object is 3 N.
option B is the correct answer.
How much force must be applied to lift the object?
The amount of force that must be applied to lift the load is calculated by applying formula of mechanical advantage.
The mechanical advantage of a simple machine is the ratio of load to effort applied to overcome the load. Also, it can be defined as the ratio of output force to input force, otherwise known as force ratio.
Mathematically, the formula for mechanical advantage is given as;
M.A = output force / input force
M.A = load / effort
The amount of force that must be applied to lift the object is calculated as;
M.A = Fo / Fi
where;
Fo is the output force = loadFi is the input force = applied forceFi = ( Fo ) / ( M.A )
Fi = ( 9 N ) / ( 3 )
Fi = 3 N
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A sock stuck to the inside of the clothes dryer spins around the drum once every 2.0 s at a
distance of 0.50 m from the center of the drum.
What is it linear speed?
The sock's linear speed is 1.57 m/s.
What is linear speed?Linear speed is described as the measure of the concrete distance travelled by a moving object or the speed with which an object moves in the linear path is termed linear speed.
The sock spins once every 2.0 seconds, so its period is
T = 2.0 s
Therefore, the angular velocity of the sock is
angular velocity = 2π/ T
angular velocity = 3.14 rad/sec
The linear speed of the sock is given by
v = wr
where
w is the angular velocity
r = 0.50 m is the radius of the circular path of the sock
Substituting the values, we have that
v = wr = 3.14 x 0.50
v = 1.57 m/s.
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Why does the graph slant upward in the first part but then level out? Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
The graph slants upward in the first part and then levels out because it is showing the relationship between two variables that are not directly proportional.
What is graph in physics?Graph in physics is a visual representation of a relationship between two or more physical quantities. It is used to show how these physical quantities are related and to make predictions about the physical system being studied. Graphs are an essential tool in physics, as they help to illustrate the relationships between physical variables in a clear and concise way. Graphs can also be used to calculate specific values, such as the speed of an object or the area of a circle.
As the independent variable (on the x-axis) increases, the dependent variable (on the y-axis) increases at a diminishing rate, until the point of saturation is reached and the graph levels out. The relationship between the two variables is referred to as an exponential relationship, where the dependent variable reaches its maximum value as the independent variable approaches infinity.
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how much energy is stored in a 5.0-h inductor carrying 35 a?
The energy stored in a 5.0 henry inductor carrying 35 A is 3062.5 Joule.
What is inductance?An electrical conductor's tendency to resist a change in the flow of current through it is known as inductance. The SI unit for inductance is Henry, and L is used to denote it.
Inductance of the inductor is: L = 5.0 Henry.
Current flowing through it is: I = 35 ampere.
Hence, the energy stored in it = 1/2 × L × I²
= 1/2 × 5.0 × 35² Joule
= 3062.5 Joule.
So, the energy stored in the inductor is 3062.5 Joule.
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By definition, which of the following can be broken down into simpler substances? a: liquid b: solid c: compound d: atom ion
Correct option is C, Compound can be broken down into simpler substances.
Additionally, compounds can be divided into more basic components. While some elements only have one letter as their symbol, some have two. A formula is what we create when we represent a compound with symbols. For instance, table salt is a substance consisting of one sodium (Na) and one chlorine (Cl) atom (Cl).
Simpler substances cannot be created from elements. When a compound is broken down, two or more simpler compounds result. Elements are pure substances, 113 of which are recognized. Millions of chemicals exist. Each water molecule is made up chemically of two hydrogen and one oxygen atoms. Only chemical processes can break down water into its constituent parts. Features that make it possible to identify one type of substance from another
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a canonball is shot 80 m/s horizontally from the top of a 15 meter tower
Answer:
ok what do you want answered
Water flowing out of a 16.0 mm-diameter faucet fills a 1.00 L bottle in 15.0 s. At what distance below the faucet has the water stream narrowed to 10 mm diameter?
The 3.12 cm distance below the faucet has the water stream narrowed to 10 mm diameter.
What is distance ?
Distance is the overall distance that an object actually travels along its course. The displacement of an object between two points is the smallest straight-line distance between those two points, measured from one position to the other. The metric system is used to measure both displacement and distance (m).
What is diameter ?
The centre of a figure or body is defined as a straight line. specifically: the length of a diameter, which is a line segment passing through the centre of a circle and ending on the circumference.
1 Liter converts to 1 X 10-3 m3, therefore the volume flow rate is
1 X 10-3/15 = 6.667 X 10-5 m3/s
That flow rate = Av so we can find v at the two different diameters
At 16 mm diameter, we get 6.667 X 10-5 = (π)(8 X 10-3)2(v)
v = .3317 m/s
At 10 mm diameter, we get 6.667 X 10-5 = (π)(5 X 10-3)2(v)
v = .8493 m/s
Finally apply vf2 = vo2 + 2ad
(.8493)2 = (.3317)2 + 2(9.8)(d)
d = .0312 m which is 3.12 cm
Therefore, 3.12 cm distance below the faucet has the water stream narrowed to 10 mm diameter.
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write an expression using the variables provided for the force applied by the student fs.
W = F. ds is the equation that results when a force F operates on a particle and the particle is moved by a displacement ds. F. ds. cos is equal to this dot product.
When there is force, there is work. There will always be a force, and that force will always work. The body will move slightly as a result of the imparted force. No force is applied if there is no displacement. Two requirements must be met in order for work to occur: a force must be applied. The force ought to result in some movement. Therefore, the formula for work is: work = product of force magnitude, displacement, and cosine of the angle formed by the vectors of force and displacement.
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g during forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of 60.0 mm hg between the lungs and chest wall.
The force in newtons this pressure creates on the 600 cm2 surface area of the diaphragm is 4.802 N.
P =60.0mm×133.3pa/1mm hg = 7998.
= 600/100² = 0.06
= 7998×0.06= 4.802N.
Stress is the force applied perpendicular to the surface of an object in keeping with the unit location over which that force is shipped. Gauge strain is the strain relative to the ambient strain. Numerous gadgets are used for the specific strain. strain is defined to be the quantity of pressure exerted per location.
The pascal (Pa) is the same old unit of stress. A pascal is a very small quantity of stress, so the most beneficial unit for normal gasoline pressures is the kilopascal (kPa). A kilopascal is equal to a thousand pascals. Another usually used unit of pressure is the atmosphere (atm).strain is commonly measured in units of pressure in step with a unit of surface vicinity ( P = F / A). In bodily technological know-how, the image for strain is p and the SI unit for measuring stress is the pascal (image: Pa). One pascal is the pressure of one Newton consistent with a square meter appearing perpendicular on a floor.
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Complete Question:
During forced exhalation, such as when blowing up a balloon, the diaphragm and chest muscles create a pressure of 60.0 mm Hg between the lungs and chest wall. What force in newtons does this pressure create on the 600 cm2 surface area of the diaphragm?
This pressure exerts a 4.802 N force on the 600 cm2 surface area of the diaphragm.
The force delivered perpendicularly to an object's surface in accordance with the unit location across which that force is distributed is known as stress. The strain in relation to the ambient strain is known as gauge strain. There are several tools utilised for the particular strain. The amount of pressure applied to each site is referred to as strain.
The traditional unit of stress is the pascal (Pa). The kilopascal is the ideal measure for regular fuel pressures since a pascal is a relatively modest amount of tension (kPa). One thousand pascals is equivalent to one kilopascal. The atmosphere is another frequently used unit of pressure (atm). Pressure units along with a unit of surface proximity are widely used to quantify strain (P = F / A). In physical technology, the SI unit for measuring stress is the pascal, and the image for strain is p. (image: Pa). The pressure of one Newton equivalent to a square metre appearing perpendicular to the ground is one pascal.
Chest muscles create a pressure of 60.0 mm hg
P =60.0mm×133.3pa/1mm hg = 7998.
= 600/100² = 0.06
= 7998×0.06= 4.802N.
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5) A 1200 kg racecar starts from rest and has a velocity of 35 m/s over a distance of 100 m. What is
the net force on the racecar?
F = - 600 N is the net force on the racecar .
What is acceleration ?
Acceleration is a measure of how quickly an object changes its velocity, or the rate at which its velocity changes over time. It is a vector quantity, which means it has both magnitude and direction. In physics, acceleration is usually defined as the change in velocity per unit time, and is expressed in units of meters per second squared (m/s^2). Acceleration can result from a change in speed, direction, or both. Objects that are accelerating are said to be undergoing a net force, and their acceleration is proportional to the magnitude of the force and inversely proportional to their mass.
Rate of change of momentum = net force acting on the object …………
m Vf - m Vi / t = net force acting on the object
m (Vf - Vi / t) = F
1200 ( 0 - 10 /20) = - 600 N = F
so, net force acting on the object =
F = - 600 N
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The pulmonary artery, which connects the heart to the lungs, is 8.5 cm long and has a pressure difference over this length of 450 Pa
Part A If the inside radius of the artery is 2.4 mm, what is the volume of blood that flows per second through the pulmonary artery? Express your answer using two significant figures
Part B If the radius of the artery is reduced by 10%, by what factor is the blood flow rate reduced? Assume that all other properties of the artery remain unchanged. Express your answer using two significant figures
(note: the answers need to be in cm^3/s)
The volume of blood that flows per second through the pulmonary artery is 2.81 cm^3/s and the blood flow rate is reduced to 0.75.
A. To find the volume of blood that flows per second through the pulmonary artery, we need to use the formula for the volume flow rate of a fluid, which is:
Q = A × v
Where Q is the volume flow rate, A is the cross-sectional area of the artery, and v is the velocity of the blood flow.
We can find the cross-sectional area of the artery using the formula for the area of a circle:
A = πr²
Where r is the radius of the artery.
Substituting in the given values:
r = 2.4 mm = 0.0024 m
A = πr² = π×(0.0024 m)² = 1.13 × 10⁻⁶ m²
We are given that the pressure difference over the length of the pulmonary artery is 450 Pa, and Poiseuille's Law states that the flow rate of a fluid is directly proportional to the pressure difference, and inversely proportional to the viscosity of the fluid and the radius of the vessel, and directly proportional to the fourth power of the radius.
Q = (πr⁴Ρ)÷8ηL
Where η is the viscosity of the fluid and L is the length of the vessel.
Q = (π×(0.0024 m)⁴⁴⁵⁰ Pa)÷8η×8.510⁻² m
Q = 2.81 × 10⁻⁵ m³/s
Q=2.81×10⁻⁵ m³/s ×1000 cm³/m³ = 2.81 cm³/s
B. When the radius of the artery is reduced by 10%, the radius becomes 0.0024 m × 0.9 = 0.00216 m. The new cross-sectional area of the artery is A = π×(0.00216 m)² = 9.55 * 10⁻⁷ m²
Using Poiseuille's Law again we can find the new volume flow rate,
Q = (π×(0.00216 m)⁴⁴⁵⁰ Pa) ÷8η×8.510⁻² m
Q = 2.10 × 10⁻⁵ m³/s
Q=2.10×10⁻⁵ m³/s × 1000 cm³/m³ = 2.10 cm³/s
The new flow rate is 2.10 cm³/s / 2.81 cm³/s = 0.75
So the blood flow rate is reduced by a factor of 0.75 (or 75%) when the radius of the artery is reduced by 10%.
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How fastmust a proton move so that its kinetic energy is 80% of its total energy? A) 0.92c B) 0.98c C) 0.87c D) 0.80c E) 0.020c
The proton's speed will be 2.68 x 108 m/s if its overall kinetic energy is 80%.
What is kinetic energy?
The energy of motion, or kinetic energy, can be seen in the movement of an item or subatomic particle. Kinetic energy is present in every moving object and particle. Kinetic energy is present when something moves, such as a person walking, a baseball soaring through the air, a piece of food dropping from a table, or a charged particle in an electric field.
Kinetic energy of proton ,
K.E = ¹/₂mc²
c is the speed of light
m is the mass
Given, K.E2 is 80% of K.E1 i.e. 0.80K.E1
If K.E₁/c₁² = K.E₂/c₂²
c₂ = √(0.8K.E₁c₁²/K.E₁)
c₂ = √(0.8c₁²)
c₂ = c₁√(0.8)
c₂ = 3 x 10⁸ m/s x √(0.8)
c₂ = 2.68 x 10⁸ m/s
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a 2.4×105−kg airplane is cruising at 900 km/h.
A 2.4×105−kg airplane is cruising at 900 km/h will be 6.48 × 10^10J.
What is airplane?
An airplane is a powered, fixed-wing aircraft that is propelled forward by thrust from an engine. Airplanes come in a variety of sizes, shapes, and wing configurations. The wings, engines, and tail are the three main components of an airplane. The wings provide lift, the engines provide thrust, and the tail provides control and stability. When an airplane is in flight, the wings generate lift, the engines generate thrust, and the tail keeps the airplane balanced and flying straight. Airplanes are used for a variety of purposes, including passenger and cargo transportation, military operations, and recreational activities.
The kinetic energy of the airplane is:
KE = 1/2 mv2 = 1/2 (2.4 × 10^5)(900)^2
= 6.48 × 10^10 J
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A square copper loop,10.0 cm on a side,is located in a region of changing magnitude field.the direction of the magnetic field makes an angle 37° with the plane of the loop.the time changing field has the following time dependence , B(t) = 0.01T + (1.00×10^-3 T/s )t.find the induced emf in the copper loop for time t>0.
The induced emf in the copper loop is -79.86 mV.
What is induced emf?The induced emf in the copper loop is given by the equation:
[tex]e = -(dΦ/dt) = - (d/dt)(BAcosθ)[/tex]
where Φ is the magnetic flux through the loop, B is the magnitude of the magnetic field, A is the area of the loop, and θ is the angle between the magnetic field and the plane of the loop.
Given that the side of the square loop is 10.0 cm, the area of the loop is ([tex]10.0 cm)^2 = 100 cm^2.[/tex]
[tex]B(t) = 0.01T + (1.00×10^-3 T/s )t ,[/tex]
Given that the direction of the magnetic field makes an angle 37° with the plane of the loop, so the angle θ=37°
Substituting the values we have:
[tex]e = - (100 cm^2)( d/dt)((0.01T + (1.00×10^-3 T/s )t)cos37°)e = - (100 cm^2)(1.00×10^-3 T/s) cos37°e = - (100 cm^2)(1.00×10^-3 T/s) * 0.7986e = - (79.86×10^-3 T/s)[/tex]
The induced emf in the copper loop is -79.86 mV.
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there are two types of cellular phones: handheld phones (h) that you carry and mobile phones (m) that are mounted in vehicles. phone calls can be classified by the traveling speed of the user as fast (f) or slow (w). monitor a cellular phone call and observe the type of telephone and the speed of the user. the probability model for this experiment has the following information: p(f)
The sequential answer is :A) P(W) = 0.5 and B) P(MF) = 0.3 and C) P(H) = 0.6.
What are cellular phone ?A mobile phone[a] is a portable telephone that allows users to place and receive calls while on the go inside of a phone service area via a radio frequency link. The radio frequency link creates a connection to a mobile phone operator's switching systems, granting access to the public switched telephone network (PSTN). In North America, mobile phones are referred to as cell phones or cellular telephones since modern mobile telephone services use a cellular network design. Digital mobile phones are capable of a wide range of other services in addition to voice calling, including text messaging, multimedia messaging, email, Internet access (via LTE, 5G NR, or Wi-Fi), short-range wireless communications (infrared, Bluetooth), satellite access (navigation, messaging connectivity), business applications, video games, and digital photography.
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One of the earliest practical uses of astronomy was the timing of crop planting by
Choose one:
A. lunar eclipses.
B. the appearance of comets.
C. solar eclipses.
D. the appearance of specific planets.
E. the appearance of specific constellations.
Option- E. the appearance of specific constellations is the correct answer.
What is astronomy ?Astronomy, a science that includes the study of all extraterrestrial objects and phenomena. Until the invention of the telescope in the 17th century and the discovery of the laws of motion and gravity, astronomy was primarily concerned with finding and predicting the positions of the sun, moon, and planets. Initially for calendar and astrological purposes, later for navigation and astronomy. Scientific use Interest. The catalog of celestial bodies currently being studied is much more extensive, including in order of increasing distance, the solar system, the stars that make up the Milky Way, and other more distant galaxies. With the advent of scientific space probes, the Earth has also been studied as one of the planets, but more detailed study remains the realm of Earth science.
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How would you describe the volume of the following object? the amount of water in a swimming pool O macroscopic O microscopic O submicroscopic O all of the above O none of the above
Macroscopic is the right answer. The word "macroscopic" best describes the volume of water in a swimming pool. The "large picture" might be referred to as a macroscopic position.
High energy physics, which studies the physical systems, is another name for particle physics. Low energy physics is the study of physics at larger length scales, such as the macroscopic scale. The macroscopic scale is the length scale when things are large enough to be seen with the eye without the use of optical magnifying devices. The polar opposite of microscopic, it. Pressure, volume, temperature, and other such things are typical instances of macroscopic characteristics. For instance, the only component of the structures of diamond and graphite is carbon.
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How many electrons are needed to form a charge of
−4.70 nC
A car drives to 215 km East and then 45 km north what is the magnitude of the car displacement? round your answer to the nearest whole number?
The answer is.....
= 220
A certain circuit element is known to be a resistance, an inductance, or a capacitance.
Determine the type and value (in ohms, henrys, or farads) of the elemnt if the voltage and
current for the element are given by
a v(t) = 100 sin (200t +30°)V, i(t) = cos(200t +30°) A
b v(t) = 500 cos(100t + 50°)V, i(t) 2 cos(100% +50°)A
cv(t) = 100 cos(400t +30°)V, i(t) sin (100t+30°) A
To determine the type and value of the circuit element, we can use the relationship between voltage, current, and impedance for each type of element.
A. v(t) = 100 sin (200t +30°)V, i(t) = cos(200t +30°) A
The voltage and current are in phase, meaning that the circuit element is a resistance.
To determine the value of the resistance, we can use Ohm's law (V=IR).
100 = R * cos(200t + 30°)
R = 100/cos(200t + 30°) ohms
B. v(t) = 500 cos(100t + 50°)V, i(t) 2 cos(100% +50°)A
The voltage and current are 90 degrees out of phase, meaning that the circuit element is an inductance.
To determine the value of the inductance, we can use the relationship between voltage, current, and inductance (V = L di/dt).
500 = L * 2 * (-100sin(100t + 50°))
L = 250/100 = 2.5 henries
C. v(t) = 100 cos(400t +30°)V, i(t) = sin (400t+30°) A
The voltage and current are 90 degrees out of phase, meaning that the circuit element is a capacitance.
To determine the value of the capacitance, we can use the relationship between voltage, current, and capacitance (V = 1/C * ∫i(t) dt).
100 = 1/C * (-cos(400t+30°))
C = 100/-cos(400t+30°) farads
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