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Setler [38]
3 years ago
7

A painter on a ladder, painting the ceiling of a room comments. “It is hotter up here by the ceiling than it is down on the floo

r”. Explain why his observation is correct.
Physics
1 answer:
ira [324]3 years ago
4 0

Answer:

1. Hot air is less dense and has moved upward allowing cool air to move downward which is less dens

(Convection current)

2. The ceiling has transferred heat to him by radiation.

Explanation:

During the day when air is heated as a result of the ceiling transferring heat to it, it becomes less dens and it gains energy, which make it lighter in weight than cooler air, this hot air moves upward allowing cooler air to move downward.

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Identrying the speed of the Cart
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<h3>How to calculate the speed?</h3>

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At Low fan speed after 3 seconds, the distance covered is 162 cm:

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Speed = 120 cm/s.

At High fan speed after 2 seconds, the distance covered is 128 cm:

Speed = 128/2

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2 years ago
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