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Problem: Suppose you intercept 5.0 x 10-3 of the energy radiated by a hot sphere that has a radius of 0.019 m, an emissivity of 0.81, and a surface temperature of 570 K.
A- How much energy do you intercept in 3.2 min?
Show how you get the answer, so that I can better understand how to do it. Thank you.
A circus clown weighs 900 N. The coefficient of static friction between the clown's feet and the ground is 0.4. What is the minimum pulling force that the clown must exert to yank his feet out from under himself
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