5. On his visit to the beach Marcus began to walk across the sand but soon had to break into a run to get
to the water because the sand was so hot. Which statement describes how heat was transferred to his
feet?

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Ответ:

YaBoiMando2061

03.01.2023

Physics

Explanation:

Relation between power and illumination and distance is as follows

$I = \frac{P}{R^2}$

For first case

$3600 = \frac{60}{d^2}$

for second case

$I = \frac{120}{(0.5d)^2}$

$\frac{I}{3600} = \frac{d^2}{60} \times \frac{120}{.25d^2}$

I = 3600 x 8

= 28800 lux .

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5. On his visit to the beach Marcus began to walk across the sand but soon had to break into a run to get to the water because the sand was so hot. Which statement describes how heat was transferred to his feet?