Compressed air from a tank blows on a windmill. The windmill is connected to a generator that produces electrical energy. Part of that electrical energy is used to compress more air into the tank.
A. first kind
B. second kind
A. first kind
You might also like to view...
Reactance: A simple ac circuit is composed of a capacitor connected across the terminals of an ac power source. If the frequency of the source is doubled, what happens to the reactance of the capacitor?
A. It increases by a factor of 4.
B. It increases by a factor of 2.
C. It increases by a factor of 
.
D. It decreases by a factor of 2.
E. It decreases by a factor of 4.
In a reference frame floating in space, which do you think follows the straighter path?
A. The earth B. The moon C. The center of mass of the earth/moon system
Your lungs hold 4.2 L of air at a temperature of 27°C and a pressure of 101.3 kPa. How many moles of air do your lungs hold? (R = 8.31 J/mol ? K)
A) 0.15 moles B) 0.17 moles C) 0.19 moles D) 0.21 moles E) 0.23 moles
Refracting telescopes suffer from ____________________ aberration
Fill in the blank(s) with correct word