The masses of most spiral galaxies, like ours, are a few billion solar masses
Indicate whether the statement is true or false
FALSE
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A rifle fires a bullet. Immediately after the bullet is fired, which of the following is NOT true?
A. the rifle and the bullet have the same magnitude of momentum B. the force on the rifle due to the bullet and the force on the bullet due to the rifle have the same magnitude C. the impulse on the rifle due to the bullet and the impulse on the bullet due to the rifle have the same magnitude D. the rifle and the bullet do not have the same kinetic energy E. the rifle and the bullet have the same kinetic energy
About where is our solar system located within the Milky Way Galaxy?
a) about half way from the center of the galaxy to the outskirts of the galactic disk b) in the halo of the galaxy about the galactic disk c) near the far outskirts of the galactic disk
In ?- decay, the number of neutrons in the nucleus is
A) decreased by 1. B) decreased by 2. C) increased by 1. D) increased by 2. E) remains unchanged.
Capacitor #1 has parallel plates of length L and width W, plate separation d, and is filled with dielectric with constant K.Capacitor #2 has parallel plates of length 2L and width 2W, plate separation 2d, and is filled with dielectric with constant 2k. If a voltage V is applied to capacitor #1 and a voltage 2V is applied to capacitor #2, which capacitor stores more energy and by what factor?
a. Capacitor #2 by a factor of 8 b. Capacitor #2 by a factor of 16 c. Capacitor #1 by a factor of 4 d. Both capacitors store the same energy.