Author Question: At room temperature, a typical person loses energy to the surroundings at the rate of 62 W. If ... (Read 120 times)

urbanoutfitters · **on:** Jul 29, 2018

At room temperature, a typical person loses energy to the surroundings at the rate of 62 W.

If this energy loss has to be made up by an equivalent food intake, how many kilocalories (food calories) does this person need to consume every day just to make up this heat loss? (1 cal = 4.186 J)
A) 1300 kcal B) 1100 kcal C) 1600 kcal D) 1000 kcal E) 1500 kcal

Question 2

A satellite, initially at rest in deep space, separates into two pieces, which move away from each other. One piece has a rest mass of 190 kg and moves away with a speed 0.280c,

and the second piece moves in the opposite direction with a speed 0.600c. What is the rest mass of the second piece?
A) 88.7 kg B) 68.8 kg C) 79.6 kg D) 52.7 kg E) 73.9 kg