On a graph plotting galaxy luminosities against galaxy colors, the red sequence represents galaxies that are ________ than galaxies of the blue cloud.
A) larger and more elliptical
B) smaller and more irregular in shape
C) more likely to have spiral shapes
D) hotter and less luminous
A) larger and more elliptical
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Your instructor rides on a merry-go-round turning at a constant rate. In which direction does the net force on your instructor point?
a. down b. tangent to the circular path c. away from the center d. toward the center
The acceleration due to gravity on the Moon is only one-sixth of that on Earth, and the Moon has no atmosphere
If you hit a baseball on the Moon with the same effort (and therefore at the speed and angle) as on Earth, how far would the ball would travel on the Moon compared to on Earth? Neglect air resistance on Earth. A) 1/6 as far as on Earth B) 36 times as far as on Earth C) the same distance as on Earth D) 6 times as far as on Earth E) as far as on Earth
A thrown stone hits a window, but doesn't break it. Instead it reverses direction and ends up on the ground below the window. In this case, we know:
a. the force of the stone on the glass > the force of the glass on the stone. b. the force of the stone on the glass = the force of the glass on the stone. c. the force of the stone on the glass < the force of the glass on the stone. d. the stone didn't slow down as it broke the glass.
A race car moving with a constant speed of 60 m/s completes one lap around a circular track in 50 s. What is the magnitude of the acceleration of the race car?
a. 8.8 m/s2 b. 7.5 m/s2 c. 9.4 m/s2 d. 6.3 m/s2 e. 5.3 m/s2