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2 years ago

Which would show an example of how physical changes are reversible?

Physics

2 answers:

Rina8888 [55]2 years ago

7 0

Answer:

melting tin and then cooling it into a mold

Explanation:

laiz [17]2 years ago

3 0

Examples of reversible changes include melting chocolate and changing it back into a solid by cooling it, and melting candle wax by heating it and solidifying the wax by cooling it. Reversible changes are changes that can be reversed. They are also known as physical changes.

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4. State in words how acceleration is calculated.

dimaraw [331]

You multiply force times friction

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2 years ago

Spiderman, whose mass is 74.0 kg, is dangling on the free end of a 11.0-m-long rope, the other end of which is fixed to a tree l

Anestetic [448]

Answer:

W = -1844.513 J

Explanation:

GIVEN DATA:

mass of spider man is m 74 kg

vertical displacement if spider is 11 m

final displacement = 11 cos 60.6 = - 6.753 m

change in displacement is = -6.753 - (-11) = 4.25 m

gravity force act on spiderman is f = mg = 74 × 9.8 = 725.2 N

work done by gravity is $W = F \delta r cos\theta$

$W = 725.2 \times 4.25 \times cos 180$

where 180 is the angle between spiderman weight and displacement

W = -1844.513 J

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2 years ago

Form a hypothesis about how deeply water could erode and about how deeply glaciers could erode

Softa [21]

A hypothesis is an educated guess. It's your own opinion!

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3 years ago

What form of matter is vapor?

katrin [286]

The form of matter that is vapor is a gas made of a substance that is usually liquid.
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2 years ago

A physical science test book has a mass of 2.2kg. . What is the weight on the earth

dem82 [27]

Weight = mg, g ≈ 9.8 m/s²

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3 years ago

Read 2 more answers