How long does it take a [tex]$1.51 \times 10^4 \, W$[/tex] steam engine to do [tex]$8.72 \times 10^6 \, J$[/tex] of work? Round your answer to three significant figures.

A. [tex][tex]$1.02 \times 10^1 \, s$[/tex][/tex]
B. [tex]$5.77 \times 10^2 \, s$[/tex]
C. [tex]$7.21 \times 10^5 \, s$[/tex]
D. [tex][tex]$1.32 \times 10^{11} \, s$[/tex][/tex]



Answer :

To determine how long it takes for a steam engine with a power of [tex]\(1.51 \times 10^4 \, \text{W}\)[/tex] to perform [tex]\(8.72 \times 10^6 \, \text{J}\)[/tex] of work, we need to use the formula that relates power, work, and time. The relationship is given by:

[tex]\[ \text{Power} = \frac{\text{Work}}{\text{Time}} \][/tex]

Rearranging this equation to solve for time, we get:

[tex]\[ \text{Time} = \frac{\text{Work}}{\text{Power}} \][/tex]

Substitute the given values into the equation:

[tex]\[ \text{Time} = \frac{8.72 \times 10^6 \, \text{J}}{1.51 \times 10^4 \, \text{W}} \][/tex]

By performing the division:

[tex]\[ \text{Time} = \frac{8.72 \times 10^6}{1.51 \times 10^4} \][/tex]

Carrying out the division:

[tex]\[ \text{Time} = 577.4834437086092 \, \text{s} \][/tex]

Rounding to three significant figures, we have:

[tex]\[ \text{Time} \approx 577.483 \, \text{s} \][/tex]

Thus, among the given options, the correct answer is:

[tex]\[ 5.77 \times 10^2 \, \text{s} \][/tex]