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

Physics & Space Science

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Where does the chemical reaction known as "respiration" occur?

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Physics & Space Science

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?

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Physics & Space Science

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?

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Physics & Space Science

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.

Physics & Space Science