Heat a room using the least energy by
A. burning natural gas (methane)
B. using natural gas to run a heat pump
C. burning coal
D. burning gasoline
Answer: B. using natural gas to run a heat pump
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Why is the sky blue?
A) Air molecules scatter blue light more effectively than red light. B) The gases in Earth's atmosphere emit blue light. C) The Sun mainly emits blue light. D) The atmosphere transmits mostly blue light. E) Because of the way light is reflected off of the oceans.
To be dimensionally consistent, distance [L], velocity [L/T], and acceleration
must be related as follows.
A. 
B. distance = velocity/acceleration
C. 
D. 
In pair creation,
A) matter is conserved but energy is created. B) two oppositely-flavored pizzas are created. C) matter and energy are both conserved. D) matter and energy are both created. E) matter is created but energy is conserved.
A 1.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. If the initial velocity is 4.00 cm/s and the initial displacement is 0.00 cm, then what is the maximum spring potential energy of the simple harmonic motion?
A. 
B. 
C. 
D. 
E. 