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2 years ago

8

A scale reads 184 N when a piece of copper is hanging from it. What does it read (in N) when it is lowered so that the copper is

submerged in water?

1 answer:

3241004551 [841]2 years ago

4 0

Answer:

163 N

Explanation:

The density of copper is about 8.96. The ratio of the weight in water to the weight in air is about 1-1/ρ, so is about 0.8884.

0.8884 × 184 N ≈ 163 N

The submerged weight is about 163 N.

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Part a)

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Part b)

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Explanation:

Diameter of the circle = 24 ft

Diameter = 731.52 cm = 7.3152 m

now the horse complete 144 trips in one hour

so time to complete one trip is given as

$t = \frac{3600}{144} s$

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now the speed of the horse is given as

$v = \frac{2\pi r}{t}$

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Part b)

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$W = mgh$

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$Power = \frac{Work}{time}$

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$P = 412.02 Watt$

now we know that 1 HP = 746 Watt

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2 years ago