A 0.28-kg stone you throw rises 34.3 m in the air. The impulse the stone receives from your hand while being thrown is
a. 2.7 N s, up.
b. 2.7 N s, down.
c. 7.3 N s, up.
d. 7.3 N s, down.
e. 9.6 N s, up.
c
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Where does the chemical reaction known as "respiration" occur?
A) at many points all over your body B) in the lining of your lungs C) in the air while it is being held in your lungs D) in living plants E) in your nose
An earthquake emits both S-waves and P-waves which travel at different speeds through the Earth. A P-wave travels at 9 000 m/s and an S-wave travels at 5 000 m/s. If P-waves are received at a seismic station 1.00 minute before an S-wave arrives, how far away is the earthquake center?
a. 88.9 km b. 1 200 km c. 675 km d. 240 km e. 480 km
A 2.3-kg object traveling at 6.1 m/s collides head-on with a 3.5-kg object traveling in the opposite direction at 4.8 m/s. If the collision is perfectly elastic, what is the final speed of the 2.3-kg object?
A) 0.48 m/s B) 7.1 m/s C) 3.8 m/s D) 4.3 m/s E) 6.6 m/s
In a thermodynamic process, the internal energy of a system in a container with adiabatic walls decreases by 800 J. Which statement is correct?
a. The system lost 800 J by heat transfer to its surroundings. b. The system gained 800 J by heat transfer from its surroundings. c. The system performed 800 J of work on its surroundings. d. The surroundings performed 800 J of work on the system. e. The 800 J of work done by the system was equal to the 800 J of heat transferred to the system from its surroundings.