The three main types of radiation produced by the sun are
A) radio, infra-red, and visible.
B) infra-red, visible, and ultra-violet.
C) visible, radio, and gamma.
D) gamma, visible, and ultra-violet.
E) alpha, beta, and gamma.
B
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In astronomical usage, all atoms heavier than helium are referred to as__________
A) metals B) Population I atoms C) halos D) dark matter
A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.00 
acquires an angular velocity of 5.00 rad/sec. The CD continues rotating at 5.00 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the angular distance traveled by a point 4.00 cm from the center, at the time 10.0 seconds from the start?
A. 20.8 radians B. 26.3 radians C. 37.5 radians D. 41.6 radians E. 47.3 radians
A 2.00-g bullet hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.20-m long string. This causes the block to swing through an arc of 3.50°. What was the speed of the bullet before it hit the block?
A) 16.7 m/s B) 524 m/s C) 25.3 m/s D) 262 m/s E) 789 m/s
The most important force between a proton and a neutron is the ______________ force
a. strong nuclear b. quark c. electromagnetic d. gravitational