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trapecia [35]
3 years ago
8

Jill leaves home and rides a distance of 70 km. It took her 2.5 hours. What is her speed?

Physics
1 answer:
Paraphin [41]3 years ago
5 0
The answer is ...
28 km per hour
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Answer:NO

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No the mold should not be of the same size as that of sculpture because the material from which molds is made may shrink or expand depending upon its properties .

For example grey cast iron shrinks on cooling.

We need to make mold bigger in general so that if there is a need of finishing it can be done easily without altering the size of sculpture.

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ohaa [14]
A window is the most transparent object from these, so that is the answer.
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Does the refraction of light make a swimming pool seem deeper or shallower? explain your answer.
larisa [96]

The refraction of light makes a swimming pool seem <u>shallower</u>.

The swimming pool seems shallower because the rays of light coming from the bottom of the pool do not come with a straight path. The path of light is straight as long as it is in the water.

When lights come out of the water into the air it bents downwards. This bending is called refraction.

Refraction forms a virtual image of the pool and it seems shallower than it actually is to the observer. This only happens when light travels from one transparent medium into another having lower density.

If you need to learn more about why a swimming pool appears <u>shallower</u>, click here

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6 0
1 year ago
0.5 kg air hockey puck is initially at rest. What will it’s kinetic energy be after a net force of .8 N acts on it for a distanc
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Answer:

1.6 J

Explanation:

Work = change in energy

W = ΔKE

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KE = 1.6 J

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3 years ago
Allison wants to calculate the speed of a sound wave.
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