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Zanzabum
3 years ago
11

A ring made of gold is heated and then hammered into a flat, coin-like shape. Is this a physical change? Explain.

Physics
2 answers:
Tamiku [17]3 years ago
7 0
Yes. a physical change is only modifying the structure of it.

a chemical change is permanently changing something.

cutting cheese into slices is a physical change

cooking an egg is a chemical change
andre [41]3 years ago
6 0
Yes,
this would be a physical change because the chemical composition is not being effected. When you change the shape of gold, it will remain gold but have a different look. 
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Answer:

b. a massive collapsed star

Explanation:

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4 0
3 years ago
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What is the angular momentum of a 0.25 kg mass rotating on the end of a piece of
finlep [7]

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4 0
2 years ago
You're driving your new sports car at 80 mph over the top of a hill that has a radius of curvature of 540 m. What fraction of yo
luda_lava [24]

Answer:

75.84%

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v=80mph= 35.76 m/s

The radius of curvature is given as , r = 540 m

✓ the normal weight can be denoted as Wn

✓ the apparent weight of the person can be denoted as Wa

Wn= normal weight= mg

Wa=apparent weight = (mg - mv^2/r)

g= acceleration due to gravity= 9.8m/s^2

The apparent weightand normal weight has a ratio of

Mn/Ma= [mg - mv^2/r]/mg ........eqn(1)

If we simplify eqn(1) we have

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Then substitute the given values

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4 0
3 years ago
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