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lorasvet [3.4K]
3 years ago
6

- A student states that Earth would be no different if water did not expand when it freezes. Do you agree with this statement? E

xplain your answer.
Physics
2 answers:
chubhunter [2.5K]3 years ago
7 0
If water didnt expand when it froze then it would be more dense so ice would sink. If ice sunk then it would cause a lot of ocean life to die because of the cold and water levels to rise more.
Licemer1 [7]3 years ago
4 0

Yes I agree.

The very basic fundamental to remember here is that the ice when expands causes the floating of itself on top of water. Thus, if ice stops expanding, it will not float on the top of water body and thus would sink and may cause the freezing additional water in the water bodies. This could happen in the Antarctic , Arctic and all cold regions. Rivers may stop flowing in cold regions as they all will be frozen and also the survival of species will become difficult

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What is the focal length (in meters) of a lens whose radius of curvature is 9. 2 m and has a refractive index 1. 2?
Fed [463]

The focal length (in meters) of a lens whose radius of curvature is 9. 2 m and has a refractive index  1.2 will be 18.4 m

The focal length of a lens is determined when the lens is focused at infinity. Lens focal length tells us the angle of view—how much of the scene will be captured—and the magnification—how large individual elements will be.

Focal length of a lens is the distance between center of lens and focal point . Focal point is a point on principal axis , at which light rays parallel to principal axis meet after refraction through lens or seem to meet after refraction .

The radius of curvature is the radius of sphere formed by the convex or concave mirror. It is also equal to the distance between the pole and center of curvature. The sign convention for focal length and radius of curvature is the same.

focal length = 2 * radius of curvature

given

radius of curvature = 9.2 m

focal length = 2 * 9.2

                    = 18.4 m

To learn more about focal length here

brainly.com/question/16188698

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4 0
2 years ago
According to Newton's third law of motion, if you push against a wall, the wall will __________.
beks73 [17]
It would be C as the law says "<span>Formally stated, </span>Newton's third law<span> is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object."</span>
8 0
3 years ago
Read 2 more answers
What is magnetic resonance???​
Lyrx [107]

Answer:

procedure in which radio waves and a powerful magnet linked to a computer

Explanation:

Listen to pronunciation. (mag-NEH-tik REH-zuh-nunts IH-muh-jing) A procedure in which radio waves and a powerful magnet linked to a computer are used to create detailed pictures of areas inside the body. These pictures can show the difference between normal and diseased tissue.

5 0
3 years ago
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In order to decrease the friction an object experiences, you can either change
Kipish [7]

Answer:

Reduce its weight

Explanation:

For an object on a flat surface, the maximum force of friction experienced by the object is given by:

F = \mu W

where

\mu is the coefficient of friction

W is the weight of the object

As we can see from the formula, there are two ways of reducing the  friction:

- Decreasing \mu --> this coefficient depends on the material and on the roughness of the surface, so this can be changed by changing the properties of the surface

- Decreasing W, the weight --> this can be done by reducing the mass of the object

8 0
3 years ago
1. An object of mass 300 kg is observed to
vekshin1

Answer:

The force required will be "300 N".

Explanation:

The given values are:

Mass of object,

m = 300 kg

Acceleration,

a = 1 m/s

Now,

The force will be:

⇒  F=m\times a

On substituting the values, we get

⇒      = 300\times 1

⇒      =300 \ N

4 0
3 years ago
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