Author Question: A baseball catcher puts on an exhibition by catching a 0.150-kg ball dropped from a helicopter at a ... (Read 91 times)

asmith134 · **on:** Jul 28, 2018

A baseball catcher puts on an exhibition by catching a 0.150-kg ball dropped from a helicopter at a height of 100 m above the catcher. If the catcher gives with the ball for a distance of 0.500 m while catching it, what average force is exerted on the mitt by the ball? (g = 9.80 m/s2)
a. 78 N
c. 197 N
b. 119 N
d. 295 N

Question 2

What is the change in entropy (DS) when two moles of silver (108 g/mole) is completely melted at 961C? (The heat of fusion of silver is 8.82 104 J/kg.)
a. 5.53 J/K
c. 15.4 J/K
b. 7.72 J/K
d. 12.1 J/K