When a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy. true or false?

Stion 13 of 20 : select the best answer for the question. 13. if a certain mass of mercury has a volume of 0.002 m3 at a temperature of 20°c, what will be the volume at 50°c? a. 0.002021624 m3 b. 0.004021624 m3 c. 0.000010812 m3 d. 0.002010812 m3

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.