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Oksi-84 [34.3K]
2 years ago
5

What are 5 examples of expansion and contraction? What are their benefits?

Physics
1 answer:
liubo4ka [24]2 years ago
6 0

Answer:

If you hold a hot glass tumbler under cold water, it will crack

Explanation:

This is because the outer surface of the glass comes in direct contact with cold water and contracts more compared to the inner surface.

This is one example I know.

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Zoe is setting up a track for a toy car. The track has a ramp that is 32° above horizontal. If Zoe wants the car to travel as a
jolli1 [7]

Answer:

Explanation:

Not enough information.

IF we ASSUME she wants the car to be at LAUNCH LEVEL after 1 second of flight.

THEN

The highest point will have zero vertical velocity and will have taken ½ second to get there. This means that the initial vertical velocity was

v = gt

vy₀ = 9.8(0.5)

vy₀ = 4.9 m/s

vsinθ = vy₀

v = vy₀/sinθ

v = 4.9/sin32

v = 9.2466...

v = 9.2 m/s

8 0
2 years ago
What is the mean of 22, 72, 79, 72, and 70
Nataly_w [17]

Answer:

63

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315/5 = 63

The mean is 63

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3 years ago
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inysia [295]

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8 0
3 years ago
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