Question

A 120 volt refrigerator uses 650 watts. Calculate how much work is done by the refrigerator in one hour.

A) 9.7 J
B) 39,000 J
C) 2,300,000 J
D) 4,100,000 J

Answer 1

1 Watt = 1 joule/second

650 watts = 650 joules/second

(650 J/sec) x (3,600 seconds/1 hour) = 2,340,000 Joules/hour

Answer 2

C) 2,300,000 J

Step-by-step explanation:

A 120 volt refrigerator uses 650 watts. Calculate how much work is done by the refrigerator in one hour.

A) 9.7 J

B) 39,000 J

C) 2,300,000 J

D) 4,100,000 J

power is the rate at which work is done by a machine.

work done is the product of force and distance,

it is also when energy is expended by a machine

energy can be dissipated by the refrigerator in form of heat

power=650W

time=3600 secs

work done will be 650*3600

2340000.

approximately 2300000J