Ask Question
Yesterday, 05:42

A 3.00 watt electric motor is plugged into an electrical outlet It takes the motor 30 00 seconds to lift a mass of 254.9 g a distance of

10.00 cm. In that time, the motor has used 90.00 J of energy Assuming no energy leaves the system, how much heat has been

added to the system by the end of those 30 seconds?

+1
Answers (1)
  1. M
    Yesterday, 07:37
    0
    89.75 J

    Explanation:

    The motor uses 90.00 J of electrical energy. Any of that energy that isn't used to do work is converted to heat.

    The amount of work done is:

    W = mgh

    W = (0.2549 kg) (9.81 m/s²) (0.1000 m)

    W = 0.2501 J

    So the heat generated is:

    Q = 90.00 J - 0.2501 J

    Q = 89.75 J
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “A 3.00 watt electric motor is plugged into an electrical outlet It takes the motor 30 00 seconds to lift a mass of 254.9 g a distance of ...” in 📘 Physics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers
Sign In
Ask Question