Question

If the intensity of direct sunlight at a point on the earth's surface is $0.78 \mathrm{kW} / \mathrm{m}^{2},$ find $(\mathrm{a})$ the average momentum density (momentum per unit volume) in the sunlight and (b) the average momentum flow rate in the sunlight.

Name: If the intensity of direct sunlight at a point on the earth's surface is 0.78 kW / m^2, find (a) the average momentum density (momentum per unit volume) in the sunlight and (b) the average momentum flow rate in the sunlight.
Uploaded: 2021-12-08T16:55:17-08:00
Duration: 39 s
Channel: Penny Riley
Description: If the intensity of direct sunlight at a point on the earth's surface is 0.78 kW / m^2, find (a) the average momentum density (momentum per unit volume) in the sunlight and (b) the average momentum flow rate in the sunlight.

          If the intensity of direct sunlight at a point on the earth's surface is $0.78 \mathrm{kW} / \mathrm{m}^{2},$ find $(\mathrm{a})$ the average momentum density (momentum per unit volume) in the sunlight and (b) the average momentum flow rate in the sunlight.

Added by Ryan L.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Penny Riley

12/08/2021

Step 1

Given intensity of direct sunlight, $I = 0.78 \, \text{kW/m}^2 = 0.78 \times 10^3 \, \text{W/m}^2$. Speed of light, $c = 3 \times 10^8 \, \text{m/s}$. Average momentum density, $R = \frac{I}{c^2} = \frac{0.78 \times 10^3}{(3 \times 10^8)^2} = 8.67 \times 10^{-15} Show more…

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If the intensity of direct sunlight at a point on the earth's surface is $0.78 \mathrm{kW} / \mathrm{m}^{2},$ find $(\mathrm{a})$ the average momentum density (momentum per unit volume) in the sunlight and (b) the average momentum flow rate in the sunlight.