Chapter 10, Problem 35E

Interpretation Introduction

Interpretation:

Whether the surface of the hot tub would receive enough solar energy or not is to be determined.

Concept Introduction:

Power input is the total surface area multiplied by the solar power. The percent of the input power that is converted to output power is called its efficiency. Percent efficiency is $100$ multiplied by the ratio of power out and power in.

$\text{Percent efficiency}=\frac{\text{Power out}}{\text{Power in}}\times 100$ …… (1)

Power is given by the expression as follows:

$\text{Power}=\frac{\text{energy}}{\text{time}}$ ……(2)

$\text{Average solar power}=\frac{\text{Power input}}{\text{Surface area}}$