A 2 kW kettle contains 2 kg of water at 10°C. It is switched on for 420 seconds, and the
temperature rises to 100°C.
a) How much electrical energy is supplied?
b) How much energy was given to the water?
c) Why are these 2 answers not the same?
d) What percentage of the energy supplied wen
to the water?
e) How could this percentage (the efficiency)
be increased?

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

i sometimes feel that way too. i feel that i should hurt someone because they hurt me, but i wouldnt do it. that would make things so much worse i have so much experience with this stuff

explanation:

i think the answer is a, hope this is right, that would be my best guess.

b.

explanation: