Question

An hour of CFL use consumes 10-2 kWh (kilowatt – hour), if each kilowatthour of electricity use is equivalent to 3.6 X 106 joules of energy, then find out the energy in joules used by the CFL in one hour

Answer 1

Answer:

$3.6*10^{4}\ joules$  or $36,000\ joules$

Step-by-step explanation:

Let

x -----> the energy in joules used by the CFL in one hour

we know that

using proportion

$\frac{1}{3.6*10^{6}}\frac{kWh}{joules} =\frac{10^{-2}}{x}\frac{kWh}{joules}\\ \\x=(3.6*10^{6})(10^{-2})\\ \\x=3.6*10^{4}\ joules$

or

$36,000\ joules$