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Q. 43

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 545

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Short Answer

A 150 L 1≈40 gal2 electric hot-water tank has a 5.0 kW heater.

How many minutes will it take to raise the water temperature from 65°F to 140°F?

The required time is 87mins

See the step by step solution

Step by Step Solution

Step 1: Definition of temperature

Temperature is measured of coldness and hotness that is account wit different scales.

Step 2: Finding the time

The temperature difference is that is in kelvin

Assume Q is heart and t is time so

where P is power

Now

Now convert second in minutes

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