An 8.0-kg object moving 4.0 m/s in the positive x direction has a one-dimensional collision with a 2.0-kg object moving 3.0 m/s in the opposite direction. The final velocity of the 8.0-kg object is 2.0 m/s in the positive x direction. What is the total kinetic energy of the two-mass system after the collision?

a. 32 J
b. 52 J
c. 41 J
d. 25 J
e. 29 J


c

Physics & Space Science

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According to the nebular theory of solar system formation, which of the following best explains why the solar nebula ended up with a disk shape as it collapsed?

A) As the nebula shrank and rotated faster, collisions between orbiting particles caused it to flatten into a disk. B) The nebula was fairly flat to begin with, and retained this flat shape as it collapsed. C) The force of gravity pulled material that was spherically distributed downward into a flat disk. D) the law of conservation of energy

Physics & Space Science

The number of protons in a neutral atom is balanced by an equal number of

A) electron shells that surround the nucleus. B) neutrons in the nucleus. C) orbital electrons. D) none of the above

Physics & Space Science

Identify (name) the 12 leptons:

What will be an ideal response?

Physics & Space Science

In the light curve below, what is the period of the eclipsing binary?



a. 5 days

b. 32.5 days

c. 7.5 days

d. 42.5 days

e. 50 days

Physics & Space Science