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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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
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
The most important force between a proton and a neutron is the ______________ force
a. strong nuclear b. quark c. electromagnetic d. gravitational