Scientists believe a liquid water ocean might exist on the moon
A. Mimas.
B. Europa.
C. Titan.
D. Triton.
Answer: B
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A far-sighted student has a near point of 1.0 m. Calculate the focal length (in cm) of the glasses needed so the near point will be normal (25 cm)
a. 72 b. 25 c. 33 d. 100 e. ?33
A 2.0 kg mass is moving in a circular path with a radius of 5.00 cm. The mass starts from rest and with constant angular acceleration, obtains an angular velocity of 6.00 rad/sec in 3.00 sec. The mass then comes to a stop with constant angular deceleration in 4.00 sec. The centripetal component of acceleration of the mass at 5.00 sec after the start is
A. 2.50 
B. 2.03
C. 1.25
D. 0.980
E. 0.456
An airplane with a wingspan of 79.0 m flies parallel to the Earth's surface at a point where the downward component of the Earth's magnetic field is 0.490 × l0?4 T. If the induced potential between wingtips is 0.875 V, what is the plane's speed?
a. 54.3 m/s b. 33.9 m/s c. 226 m/s d. 17 900 m/s e. 111 m/s
How many arcseconds are in one arcminute?
A) 10,000
B) 60
C) 360
D) 100
E) 3600