(1).....opaque -object that not allow light to pass through it
we can't look through opaque objects
ex..wall
translucent... objects that all some light to pass through it
we can partially see through it
ex...coloured glass window
transparent... objects that wholly allow light to pass through it
we can clearly see through it
ex...glass of specs
(2)..the bouncing back of light from a smooth polished surface is called reflection of light
(3)/.....there must be a solid ,opaque to block light
there must be a source of light
there must be a surface to have shadow on it..
(6)...reflected images r formed by light reflection from a smooth polished surface while shadows are formed by blockage of light by an solid,opaque object...
Explanation:
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Pleaseee can u help with q 3 and 4
Answer:
Number 4 is C.
Explanation:
Trust me
Answer:
number 3 = A and number 4 = c
Which of the following statements is correct about air temperature?
1. When air temperature is higher, the weather is warmer.
2. Warm air falls to the ground.
3. Freezing air temperatures increase the chances of rain.
4. When air temperature is higher, the weather is colder.
Explanation:
Warm air falls to the ground
The statement that is correct about air temperature is when the air temperature is higher, the weather is warmer. The correct option is 1.
What is air temperature?A measurement of the air's heat or cold is its temperature. It is the weather parameter that is most frequently measured.
The kinetic energy, or energy of motion, of the gases that make up air, is more explicitly described by temperature. The temperature rises as gas molecules move more swiftly.
Surface temperatures are typically hotter than air temperatures. Parking your car in the sun is an illustration of this. The air inside the car will be fairly close to the outside air temperature and you may leave the windows down and yet have excellent ventilation.
Therefore, the correct option is 1. When the air temperature is higher, the weather is warmer.
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A vector is defined by its direction and length; its location does not
matter.
A:True
B:False
False.
a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.Vectors are quantities that are fully described by magnitude and direction. Not Length!
Answer:
B.) False
Explanation:
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Question 5: Which object traveled at a faster speed? (Make sure to show your
work!!)
Object A: 65 miles in 13 minutes
Object B: 125 miles in 25 minutes
Answer: objects A and B have the same speed.
Explanation:
Speed = distance divided by time.
Object A: 65 miles in 13 minutes
Speed (A) = 65 miles divided by 13 minutes
Speed (A) = 5 miles per minute
Object B: 125 miles in 25 minutes
Speed (B) = 125 miles divided by 25 minutes
Speed (B) = 5 miles per minute
Thus, objects A and B have the same speed.
Analyzing Ideas A friend claims to have built a
motor by attaching a shaft to the core of a galva-
nometer and removing the spring. Can this motor
rotate through a full rotation? Explain your answer.
Answer:
Yes, the magnet force will cause the motor rotate through a full rotation. So the friend who claims to have built a motor by attaching a shaft to the core of a galvanometer and removing the spring is correct.
True or False. A compound is formed when two or more elements are combined to make a new substance with its own properties.
Answer:
true
Explanation:
did the quiz
Difference between crest and trough
Answer:
The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength.
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A dog runs down his driveway with an initial speed of 5.0 m/s for 8 seconds then uniformly increases his speed to 10 m/s in 5 seconds, how long is the driveway? SHOW WORK
Answer:
to find the displacement, or delta x (change in position) on a velocity graph, you can find the area under the line on the graph: between 1 and 8 seconds, the dog was going at 5m/s, so 5m/s x 8s=40m, for the second part, you have to find the area of both a triangle and a rectangle, so the rectangle would be 5m/s x 5s=25m and the area under the triangle would be (5m/s x 5s)/2=25m/2=12.5m -you divide by 2 because it's a triangle
-afterwards, you would add the area of the 2 sections together, so 40m+25m+12.5m=77.5m
Explanation:
How many kgs are in 1000N?
Answer:
this much I think 101.9716212978
Answer:
approximately 102kg
Explanation:
1 kg on the surface of the Earth weighs 9.80665 N
1000 N = 1000/9.80665 kg = 102 kg
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How electromagnet works in circuit breaker
Explanation:
A circuit breaker is an automatic switch that cut off current in a circuit when the current become too large. When the current in a circuit increases, the strength of the electromagnet will increase in accordance; this will pull the soft iron armature towards the electromagnet.
A 1.0kg cart moving right at 5.0 m/s on a frictionless track collides and
sticks to a second cart moving left at 2.0 m/s. The two carts have a final
speed of 1.0 m/s to the left.
What is the mass of the second cart?
Theo and Kelly are fighting over a remote control. Theo is pulling with a force of 32 N to the left and Kelly is pulling with a force of 38 N to the right. What is the final net force and direction of movement of the remote?
Answer:
6N to the right
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Una pelota de golf se suelta desde el reposo del techo de un edificio muy alto. Despreciando la resistencia del aire, calcule (a) la posicion y (b) la velocidad de la pelota despues de 1s, 2s y 3s.
Answer:
a) y = y₀ - 4.9, v = -9.8 m / s, b) y =y₀ - 19.6, v = - 19 m / s
c) y =y₀ - 44.1, v = - 29.4 m / s
Explanation:
To solve this exercise let us use the kinematic relations
y =y₀ + v₀ t - ½ g t²
v = v₀ - g t
They indicate that the body is released therefore the initial velocity is zero v₀ = 0
y = y₀ - ½ g t²
v = - gt
a) the position and velocity for t = 1s
y = y₀ - ½ 9.8 12
y = y₀ - 4.9
v = - 9.8 1
v = -9.8 m / s
the negative sign indicates that the velocity is directed downwards
b) t = 2 s
y =y₀ - ½ 9.8 2 2
y =y₀ - 19.6
v = - 9.8 2
v = - 19 m / s
c) t = 3 s
y = y₀ - ½ 9.8 3 2
y =y₀ - 44.1
v = - 9.8 3
v = - 29.4 m / s
A car is moving with 15000J of energy. If the car has a mass of 1500kg, how fast is it moving?
Answer:
V=4.5 m/s
Explanation:
KE=1/2mv^2
1500=1/2(15000)v^2
answer :4.5m/s
Explanation:
V=30,000J/1500kg
V=20m²/s²
V=4.5m/s
lonic and Covalent compound formed through atomic bond formation. With the given
chemical formula, write the characteristic of the given properties.
Answer:
1) Sucrose C₁₂H₂₂O₁₁
Common name; Sugar
Types of Compound ; Covalent Compound
Melting point; No melting point, it decomposes when heated
Electrical conductivity; Does not conduct electricity when dissolved in water
Solubility in water; Soluble in water
2) C₉H₈O₄ (Acetyl Salicylic acid)
Common name; Aspirin
Types of Compound ; Covalent Compound
Melting point; High
Electrical conductivity; Does not conduct electricity when dissolved in water
Solubility in water; Slightly soluble in water
3) NaCl (Sodium Chloride)
Common name; Salt
Types of Compound ; Ionic Compound
Melting point; High
Electrical conductivity; Conducts electricity when dissolved in water
Solubility in water; Soluble in water
4) C₅H₈NO₄Na (Monosodium Glutamate (MSG)
Common name; Vetsin
Types of Compound ; Ionic Compound
Melting point; High
Electrical conductivity; Conducts electricity when dissolved in water
Solubility in water; Soluble in water
5) C₈H₁₈ (Octane)
Common name; Common gasoline
Types of Compound ; Covalent Compound
Melting point; Low
Electrical conductivity; Does not conducts electricity and insoluble in water
Solubility in water; Relatively insoluble in water
Explanation:
A student release a ball from a height of 1.5 above the floor. Which of the following statements best describes the energy of the ball as it falls?
Write a 5-8 sentence summary on Earthquakes.
Answer:
An earthquake is a sudden shaking movement of the surface of the earth. It is known as a quake, tremblor or tremor. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities. ... An earthquake is measured on Richter's scale.
PLEASE MARK ME BRAINLIEST, PLEASEWhich box depicts the simplest level of organization?
A) P
B) Q
C) R
D) S
The box that depicts the simplest level of organization is R. Thus, option C is correct.
What is cell ?Cell is defined as the structural and functional base of life and it has been the building block of all living things and the cell is surrounded by a protective membrane known as cell membrane.Prokaryotic cell is made up of single cell and found in unicellular animals.
Cell is generally of two types and these are eukaryotic as well as prokaryotic cell. Prokaryotic cell is made up of single cell and found in unicellular animals. The eukaryotic cell is made up of multiple cell and they contain cell organelles and these are present in multicellular animals.
The outermost part of brain has been known as dura mater that consist of a strong membrane layering and it is thick located just behind the skull and vertebral column.
Therefore,The box that depicts the simplest level of organization is R. Thus, option C is correct.
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What was an ill effect of the industrial revolution?
A)air pollution
B)crowded and unhealthy conduction in cities
C)child labor
D)all of the above
Answer:
answer is option (c) child labour
An 80 kg skier stands at the top of a 40-meter slope. She then skis down the slope. What is her approximate speed at the bottom of the slope if friction is negligible and her kinetic energy is 31360 J?
Thank you for that information. If we know her mass and kinetic energy, then we don't need any of that other business about the height of the slope, her skiing ability, the friction of the snow, what she uses to wax her skis, the color of her parka, or what she had for lunch at the chalet. The mass and kinetic energy are enough to answer the question.
Kinetic Energy = (1/2) · (mass) · (speed)²
31,360 J = (1/2) · (80 kg) · (speed)²
speed² = (31,360 J) / (40 kg)
speed² = 784 m²/s²
speed = 28 m/s
1. Which of the following best describes social
dances?
Answer:
this are dances formed mainly in communities.
Explanation:
they are done naming of children,worshipping or during initiation ceremonies
What patterns are caused by the Earth, Sun, and Moon systems?
The Earth, Sun, and Moon systems create several patterns, including the day and night cycle, seasons, lunar phases, tides, and solar and lunar eclipses. These patterns have been studied and understood by scientists for centuries and have played an important role in shaping our understanding of the universe and our place in it. Understanding these patterns is essential in comprehending the workings of the universe and the impact they have on our planet.
What patterns are caused by the Earth, Sun, and Moon systems?The Earth, Sun, and Moon systems create several patterns, including:
Day and Night cycle: The rotation of the Earth on its axis causes the alternating cycle of day and night as different parts of the planet face towards or away from the Sun.
Seasons: The tilt of the Earth's axis (23.5 degrees) causes the seasons to change as different parts of the planet receive varying amounts of sunlight throughout the year.
Lunar Phases: The Moon orbits the Earth, causing it to appear to change shape in the sky as different amounts of sunlight reflect off its surface.
Tides: The gravitational pull of the Moon and the Sun on the Earth's oceans creates a regular cycle of high and low tides.
Solar and Lunar Eclipses: The alignment of the Earth, Sun, and Moon can cause a shadow to be cast on one celestial body by another, resulting in either a solar or lunar eclipse.
These patterns have been studied and understood by scientists for centuries and have played an important role in shaping our understanding of the universe and our place in it.
Therefore, The day and night cycle, seasons, lunar phases, tides, and solar and lunar eclipses are just a few of the patterns that the Earth, Sun, and Moon systems produce. Scientists have been analyzing and studying these patterns for centuries, and they have had a significant impact on how we view the cosmos and our place in it. Knowing these patterns is crucial to understanding how the cosmos functions and how they affect our world.
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What is the major source of energy on Earth? Group of answer choices a.photosynthesis b.fossil fuels c.EM waves from the sun d.
plants that are used for food.
Answer:
Em waves from the sun d
Explanation:
Answer:
The answer is photosynthesis
Explanation:
Explain the advantages and disadvantages of having a racecar with a large mass in reference to Newton’s 1st law of motion. Use the term inertia in your answer.
Answer:
read the explanation
Explanation:
My answer to research question one is a car with a higher mass has more inertia than a car with a lower mass. A car with a higher mass needs more force to move than a car with a lower mass. The advantage of a car with greater mass is that it takes less impact when crash happens and has more protection.
The advantage of a race car with large mass is that it will continue moving without stopping once it is already in motion.
The disadvantage of a race car with large mass is that it will be difficult to get it start moving.
The Newton's first law of motion states that, an object in a state of rest or uniform motion in a straight line will continue in that form unless it is acted upon by an external force.
This first law is also known as law of inertia because it depends on mass of the object.
Inertia is reluctance of an object to move or stop moving once it is in motion.
Thus, the advantage of a race car with large mass is that it will continue moving without stopping once it is already in motion.
The disadvantage of a race car with large mass is that it will be difficult to get it start moving.
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why is sun called a source of light??
Answer:
because he give heat and energy
what is mass in physics
Answer:
Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force.
Explanation:
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Answer:
Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force.
Explanation:
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A car driving at a constant velocity of 15 m/s has what acceleration? PLEASE HELP
Answer:
32
Explanation:
What will happen in the next moment for the girl on the swing?
1.Fill in wether quantities will increase, decrease, or stay the same.
2. Support your answer in the table below
Answer:
Increase, same, same
Explanation:
what type of em waves is fm radio? And how it is used in wireless communication?
Answer:
Radio waves are used for wireless transmission of sound messages, or information, for communication, as well as for maritime and aircraft navigation. The information is imposed on the electromagnetic carrier wave as amplitude modulation (AM) or as frequency modulation (FM) or in digital form (pulse modulation).
Explanation:
Qué estudios se realizan en la actualidad para utilizar la electricidad de una manera más eficiente?
Answer:
Se realizan estudios en tres áreas: a) Procesos de transformación de la energía, b) Almacenamiento de la energía, c) Gestión inteligente entre consumo y generación.
Explanation:
Actualmente, se están realizando estudios en principalmente en tres áreas cruciales: a) Procesos de transformación de la energía, b) Almacenamiento de la energía, c) Gestión inteligente entre consumo y generación.
a) Se están desarrollando nuevos materiales que permiten mayor eficiencia entre la energía recibida y la energía eléctrica, además de una mayor durabilidad frente a las condiciones ambientales. Esto implica el mejoramiento del desempeño de las tecnologías basadas en las energías renovables y limpias, acortando su brecha con las energías no renovables.
b) Se están desarrollando nuevos materiales que garanticen una mayor densidad energética y mayor durabilidad, significando baterías más compactas, con mayor capacidad y más competitivas económicamente.
c) Se están desarrollando estrategias de control inteligente a tiempo que permite sincronizar el consumo y la generación, además de posibilitar el flujo bidireccional de la energía a través de una red inteligente (smart grid) e integrar mejor las fuentes renovables dentro de la matriz energética.