Author Question: The site location for a wind turbine is especially important. If the power output goes as the cube ... (Read 39 times)

frankwu · **on:** Jul 28, 2018

The site location for a wind turbine is especially important. If the power output goes as the cube of the wind velocity, then which of the following average velocities will give approximately twice as much output as a 10 mph wind?
a. 13 b. 20 c. 30 d. 60 e. 80 mph

Question 2

A hornet circles around a pop can at constant speed once per second in a path with a 12-cm diameter. We can conclude that the hornet's wings must push on the air with force components that are
a. straight down.
b. down and inwards.
c. down and outwards.
d. down and backwards.
e. down, inwards and backwards.