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DerKrebs [107]
3 years ago
15

A cube-shaped piece of copper has sides of 4cm each and it's density is

Physics
1 answer:
iris [78.8K]3 years ago
5 0

Answer:

64 cm^3

Explanation:

<u>Density </u>

The density of a substance is the mass per unit volume. The density varies with temperature and pressure.

The formula to calculate the density of a substance of mass (m) and volume (V) is:

\displaystyle \rho=\frac{m}{V}

We have a cube-shaped piece of copper of 4 cm of side length. The volume of the piece is:

V=(4\ cm)^3=64\ cm^3

Surprisingly, no other magnitude is required, thus the answer is:

\mathbf{64 cm^3}

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D

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What happens to the particles of a liquid when energy is removed from them?
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D: The distance between the particles decreases

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What is the correct answer?
damaskus [11]

Answer:

96 million of dollars

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3 years ago
A 26.2-kg dog is running northward at 3.02 m/s, while a 5.30-kg cat is running eastward at 2.74 m/s. Their 65.1-kg owner has the
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Answer:

Angle with the +x axis is θ = 79.599degree

Then the velocity of owner = 1.235m/s

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Given that the mass of dog is m1 =26.2 kg

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mass of cat is m2 = 5.3 kg

velocity is u2 = 2.74 m/s (east )

Mass of owner is M = 65.1 kg

Consider the east direction along +x axis andnorth along +y

momentum of dog is Py = m1 x u1

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momentum of cat is Px = m2 x u2

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Then the net magnitude of momentum is P = (Px2 + Py2)1/2

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Then the velocity of owner is v = P / M = 1.235 m/s

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