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3 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]3 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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2 years ago

if two point charges are separated by 1.5 cm and have charge values of 2.0 and -4.0, respectively, what is the value of the mutu

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Complete question:

if two point charges are separated by 1.5 cm and have charge values of +2.0 and -4.0 μC, respectively, what is the value of the mutual force between them.

Answer:

The mutual force between the two point charges is 319.64 N

Explanation:

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distance between the two point charges, r = 1.5 cm = 1.5 x 10⁻² m

value of the charges, q₁ and q₂ = 2 μC and - μ4 C

Apply Coulomb's law;

$F = \frac{k|q_1||q_2|}{r^2}$

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$F = \frac{k|q_1||q_2|}{r^2} \\\\F = \frac{8.99*10^9 *4*10^{-6}*2*10^{-6}}{(1.5*10^{-2})^2} \\\\F = 319.64 \ N$

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3 years ago

an engine has been design to work between source and the sink at temperature 177 degree Celsius and 27 degree Celsius respective

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<u>Given data</u>

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<em>Work done by the engine is 1188 J</em>

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