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Lapatulllka [165]
3 years ago
7

PLEASE SHOW STEPS!

Physics
1 answer:
SOVA2 [1]3 years ago
8 0

Answer:

660 J/kg/°C

Explanation:

Heat lost by metal = heat gained by water

-m₁C₁ΔT₁ = m₂C₂ΔT₂

-(0.45 kg) C₁ (21°C − 80°C) = (0.70 kg) (4200 J/kg/°C) (21°C − 15°C)

C₁ = 660 J/kg/°C

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A girl wants to count the steps of a moving escalator which is going up. If she counts 60 steps going up and 90 coming down. How
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Answer:

.....

Explanation:

i. sorry? i really hope this helps!

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