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Katyanochek1 [597]
3 years ago
7

Describe the motion of a ball being thrown straight up in the air in terms of kinetic and potential energy. as the ball rises up

and falls back down, how is its kinectic and potential energy affected?
Chemistry
1 answer:
denis23 [38]3 years ago
8 0
In your hand, the ball has higher potential energy than kinetic because it is still off of the ground but it isn't moving so there is no kinetic. As the ball rises, its potential and kinetic energy increases. At its peak, it has very high potential energy and very low kinetic energy. As it falls, the potential energy decreases but kinetic does not.
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A cube of an unknown metal measures 0.200 cm on one side. The mass of the cube is 52 mg. Which of the following is most likely t
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Answer:

Option E. Zirconium

Explanation:

From the question given above, the following data were obtained:

Length of side (L) of cube = 0.2 cm

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Next, we shall determine the volume of the cube. This can be obtained as follow:

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Next, we shall convert 52 mg to g. This can be obtained as follow:

1000 mg = 1 g

Therefore,

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Thus, 52 mg is equivalent to 0.052 g.

Next, we shall determine the density of the unknown metal. This can be obtained as follow:

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Density =?

Density = mass / volume

Density = 0.052 / 0.008

Density of the unknown metal = 6.5 g/cm³

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