1. An electric iron has a

power rating of 750W

a. How many joules of

electric energy does it

change into heat energy

every second?

b. How many joules of

work can it do in 3

seconds

c. How long does it take

the iron to do 1500J of

work?

2. Use the kinetic particle

theory to explain why a

solid has a definite shape

and liquid has none.

Question

Victor Stevenson

31 October, 20:03

+3

Answers (1)

Know the Answer?

Muffin · Answer 1

a) E = P * t

E = 750 * 1 s = 750 J

b) E = P * t

E = 750 * 3s = 2250 J

c) E = P * t

1500 = 750 * t

t = 1500/750

t = 2 s