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MA_775_DIABLO [31]
3 years ago
15

at room temperature, iron is a solid and mercury is a liquid. based on this information we can infer thata. iron has a higher bo

iling point than mercury.b. mercury has a higher melting point than iron.c. iron and mercury have similar melting points.d. the boiling point of iron and mercury are both low.
Physics
2 answers:
olchik [2.2K]3 years ago
8 0
A. iron has a higher boiling point thanmercury.
max2010maxim [7]3 years ago
8 0

Answer:

A

Explanation:

The general rule when it comes to the states of matter is that, the higher the temperature gets, the more the individual molecules vibrate, and they have more energy to escape the bonds that hold them in place. While, if the temperature decreases, then the molecules have less kinetic energy and the bonds/forces between the molecules ends up keeping them in a position where they cannot escape.

So with the example of iron. Iron is solid at room temperature, and hence would have a high melting point and boiling point, when compared with a substance that is liquid at room temperature (mercury).

If mercury is in a liquid state, then that means it is closer to its boiling point, than another element in a solid state.

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Answer:

a=3.53 m/s^2

Explanation:

Vo=0 m/s (because he is not moving at the start)

V1=15 m/s

t= 4.25 s

a = (V1-Vo) / t = 15/4.25 = 3.53 m/s^2

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Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a ligh
guapka [62]

Answer:

This is because the acceleration of objects due to gravity is independent of the mass of the object and is constant for all objects, therefore, all objects fall with the same speed.

Explanation:

The weight of an object or force of gravity acting on an object on the surface of earth is a product of its mass and acceleration due to gravity.

Mathematically, w = mg

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It can be seen that the acceleration due to gravity g is independent of the mass of the object. Therefore, the acceleration of objects due to gravity is constant for all objects and all objects fall with the same speed.

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