PHYSICS HIGH SCHOOL

A material that transmits nearly all the light in a ray because it offers little resistance to the light is A. translucent.
B. opaque.
C. fluorescent.
D. transparent.

Answers

Answer 1
Answer:

Answer

D. transparent.

Explanation.

Materials can be classified into three in relation to how light pass through them.

Translucent. These are materials that allow light to pass through them but you can not see through them. A good example of this material is the glass that is used to make doors of a bathroom.

Opaque. These are material that cannot at all allow light to go through them. Examples are; Thick metals, concrete, wood and many others.

Transparent. Theses are materials that allow light to go through them and also you can see through them. A good example is the windscreen of a car.

With this information the correct answer is D. transparent.
Answer 2
Answer: The answer is D, transparent

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Remote controls enable users to adjust the volume and channel of televisions without having to touch the television. Which of these best describes the signals sent by remote controls to televisions?

Answers

Answer:

When you use your control remote, you can see that there is not a "material" thing that comes out of the control remote and goes to the TV, but there is actually energy that comes from the control remote (and this is why your control remote needs battery)

This energy is called an "electromagnetic wave" usually in the infrared range, this means that the energy that comes from the control remote has less energy than the visible red light (and this is why we can not see the light that comes out of the control remote), and this "signal" is read by the TV, in order to change of channel or change the volume.

You even can see that there is a sort of light (electromagnetic wave) coming out from it if you point with a camera to the small bulb that is in the front of the control remote.

Answer:electromagnetic wave

Explanation:

Why are objects that fall near Earth’s surface rarely in free fall?

Answers


Well, "free-fall" is the condition when the ONLY force on a
falling object is the force of gravity. 

Near Earth's surface, that's only true when the object is falling
inside some kind of vacuum chamber. 

Any other time, the object is falling through air, and its motion
is affected by air resistance as well as gravity.

The object falling near the Earth's surface is rarely under free fall because of the air resistance experienced by the body.

Explanation:

According to the Newton's law of gravitation, each and every body applies an attractive force on another body kept at a particular distance. This force experienced by the body is directly proportional to the product of the masses of the body and inversely proportional to the square of distance between them.

The Earth also pulls the body towards it by the action of the attractive gravitational force. When a body falls towards the Earth under the action of the gravitational force, it moves with an acceleration. The acceleration of the body when it falls freely under the action of gravity is termed as the free fall.

The earth's atmosphere plays a significant role in the motion of the object as it falls under the gravity. The air resistance experienced by the object reduces the acceleration of the object and therefore, the object is no longer under the free fall.

Thus, The object falling near the Earth's surface is rarely under free fall because of the air resistance experienced by the body.

Learn More:

1.  A 30kg block being pulled across a carpeted floor brainly.com/question/7031524

2.  Net force acting on a 200kg refrigerator brainly.com/question/7031524

3. Max and Maya are riding on a merry-go-round brainly.com/question/8444623

Answer Details:

Grade: High School

Subject: Physics

Chapter: Acceleration

Keywords:

object, acceleration, gravitation, rarely, free, fall, gravitation, newton's, air, resistance, atmosphere, object.

A 3,000-N force gives an object an acceleration of 15 m/s2. The mass of the object is

Answers

Answer:

force= mass x acceleration

3000 N = m x 15

m= 3000/15

m=200 kg

Kepler discovered that planets move faster when they are closer to the sun. Which scientist discovered the reason they move faster?a. Brahe
b. Copernicus
c. Newton
d. Ptolemy

Answers

Answer;

C. Newton

Explanation;

  • According to Kepler, the orbital speed of a planet varies, depending on its distance from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit.
  • While thinking on Kepler's laws, Newton realized that all motion, whether it was the orbit of the Moon around the Earth or an apple falling from a tree, followed the same basic principles.
pretty sure it was Sir Issac Newton 

Which object has the least momentum? Object A: m = 1 kg, v = 100 m/s
Object B: m = 10 kg, v = 12 m/s
Object C: m = 0.5 kg, v = 1000 m/s
Object D: m = 100 kg, v = 2 m/s

Answers

the answer is c m= 0.5kg .... 
that one

A metal underground water pipe that is in direct contact with the Earth for ? or more is a code-recognized as a grounding electrode and must be included in the grounding electrode system.

Answers

Answer:

10 feet

Explanation:

In a standard procedure, there should be an approximate value of 10 feet between the water pipe and the Earth. This is to prevent the contamination of water and also the corrosion of the water pipe. Most pipes are made of iron and in the presence of water, there can be a chemical reaction between the iron and water in the presence of oxygen.
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