The energy output of a fan is 36 kWh. The fan is 75% efficient
How much energy is lost to the surroundings?
12 kWh
36 kWh
48 kWh
84 kWh

b.a device that inputs heat into a cool object

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

0.93xc=0.93x3x10^8m/s

2.54cm is 1 inch

360seconds i 1 hr

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j