A 120 V potential difference is applied to a space heater whose resistance is 11.5 Ω when hot. At what rate is electrical energy being transferred to thermal energy?

1250 W

Explanation:

The rate of energy transfer is the power of the heater. The power of the heater is given by

From Ohm's law, .

Then

Hence, power can be written as

Using values from the question,

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))