In doing a load of clothes, a clothes dryer uses 14 A of current at 240 V for 33 min. A personal computer, in contrast, uses 2.7 A of current at 120 V. With the energy used by the clothes dryer, how long (in hours) could you use this computer to "surf" the internet

Therefore,

We can use Computer to surf internet for 5.7 hours.

Explanation:

Given:

For Clothes Dryer,

Current, I = 14 A

Voltage, V = 240 V

Time, t = 33 min = 33 × 60 = 1980 s

For Computer,

Current, I = 2.7 A

Voltage, V = 120 V

To Find:

Time, t = ? For Computer to surf with the Energy of Clothes Dryer,

Solution:

According to Joule's Law, Energy in joules for voltage "V" and Current "I" for time "t" second is given as,

For Clothes Dryer

Substituting the values we get

Now for Computer we have E = 6652.8 kJ, then time will be

Again we have,

Substituting the values we get

Time in Minutes,

Time in hours again we have to divide minutes by 60

Therefore,

We can use Computer to surf internet for 5.7 hours.

they should be similar or the same