Question

A television converts 100J of electrical energy into 25J of light and 10J of sound energy. What percentage of the energy supplied to the television is lost as heat

Answer 1

Answer:65%

Explanation:The total energy supplied to the television is:

100 J

The energy that is converted into light and sound is:

25 J (light) + 10 J (sound) = 35 J

Therefore, the energy lost as heat is:

100 J - 35 J = 65 J

To find the percentage of energy supplied to the television that is lost as heat, we can use the formula:

percentage = (energy lost as heat / total energy supplied) x 100%

percentage = (65 J / 100 J) x 100% = 65%

Therefore, 65% of the energy supplied to the television is lost as heat.