Author Question: If the energy conversion efficiencies in a 3 step process are 30 for the first step, 40 for the ... (Read 43 times)

jjjetplane · **on:** Jul 28, 2018

If the energy conversion efficiencies in a 3 step process are 30 for the first step, 40 for the second, and 20 for the third, the overall efficiency (step one to end) is about:
a. 2 b. 10 c. 20 d. 50 e. 90

Question 2

A rifle is aimed horizontally at the center of a large target 60 m away. The initial speed of the bullet is 240 m/s. What is the distance from the center of the target to the point where the bullet strikes the target?
a. 48 cm
b. 17 cm
c. 31 cm
d. 69 cm
e. 52 cm