Planetary orbits are
a. parabolas. b. ellipses.
c. circles. d. none of the above.
b
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Most of the new star formation in the Galaxy is found in the:
A) halo. B) spiral arms. C) bulge. D) galactic center. E) globular clusters.
Stars evolve along the main sequence
Indicate whether the statement is true or false
Two instruments produce a beat frequency of 5 Hz. If one has a frequency of 264 Hz, what could be the frequency of the other instrument?
a. 269 Hz b. 254 Hz c. 264 Hz d. 5 Hz e. 274 Hz
A race car moving quickly around a track collides with a mosquito, which splatters on the car's windshield. Which object experiences a greater magnitude acceleration?
1.Both experience the same acceleration. 2.the race car 3.the mosquito 4.One cannot tell, you need to know the speeds of the mosquito and the race car.