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2 years ago

A 0.0414 kg ingot of metal is heated to 243◦C

Physics

1 answer:

tino4ka555 [31]2 years ago

3 0

Answer:

448 J/kg/°C

Explanation:

m₁ C₁ (T₁ − T) + m₂ C₂ (T₂ − T) = 0

(0.0414 kg) C (243°C − 20.4°C) + (0.411 kg) (4186 J/kg/°C) (18°C − 20.4°C) = 0

(9.22 kg°C) C − 4129 J = 0

C = 448 J/kg/°C

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Complete Question:

A 10 kg block is pulled across a horizontal surface by a rope that is oriented at 60° relative to the horizontal surface.

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Answer:

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Explanation:

Mass of the block = 10 kg

Angle made with the horizontal, θ = 60°

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$P = 40 *2.704 cos60\\P = 54.074 W$

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