We cannot see a new moon in our sky because ________
A) it is above the horizon during the daytime B) no sunlight is illuminating the Moon
C) it is obscured by Earth's shadow D) a new moon is quite near the Sun in the sky
D
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A rocket is launched from the origin with an acceleration of 20.0 
at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80 
downward. What is the maximum velocity in the upward direction?
A. 20.0 m/s B. 25.0 m/s C. 30.0 m/s D. 35.0 m/s E. 40.0 m/s
A spring (k = 200 N/m) is suspended with its upper end supported from a ceiling. With the spring hanging in its equilibrium configuration, an object (mass = 2.0 kg) is attached to the lower end and released from rest. What is the speed of the object after it has fallen 4.0 cm?
a. 90 cm/s b. 79 cm/s c. 96 cm/s d. 83 cm/s e. 57 cm/s
Matching a graph to a line equation Which diagram shows the equation v = 2t + 4?
By what amount does the sound intensity decrease when the distance to the source doubles?
a. 1.4 dB b. 2 dB c. 4 dB d. 6.0 dB e. 0.25 dB