Question

How do you convert 7.5 x 10^4 j into kilojoules?

Answer 1

The prefix `k` (kilo) means 1000.

Explanation:

So, just like you convert grams into kilograms by diving by 1000:

`7.5*10^4J=7.5*10000J=75000J`

`75cancel(000)cancelJ*(1kJ)/(1cancel(000)cancelJ)=75kJ`