Although the United States has less than 5% of the world's population, it accounts for approximately ______________ of the world's annual consumption of fossil fuels
a. 15%
b. 25%
c. 35%
d. 45%
b
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Answer the following statement(s) true (T) or false (F)
Which of the following devices are heat engines? 1.Your body 2. An automobile engine 3.A tornado 4. The sun 5. A rocket
Wet cooling towers are the most efficient way to eliminate waste heat
What will be an ideal response?
A viscous fluid is flowing through a small tube at a rate of 
If the pressure difference between one end of the tube and the other is doubled and the radius is also doubled, then what is the rate of flow of the fluid?
A. 
B. 
C. 
D. 
E. 
How can we tell that the Moon is held in orbit around Earth by a force?
A. One side of the Moon is always facing Earth. B. The Moon's gravity creates tides in Earth's oceans. C. The Moon is always at the same distance from Earth. D. Earth's gravitational force pulls inward on the Moon. E. The Moon follows a curved path as it orbits.