The atmosphere of Titan is chiefly
A) ammonia. B) nitrogen. C) oxygen. D) methane. E) hydrogen.
B
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A 90.0 N crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined at 20 
to the ground. What is the force exerted on the crate by the ramp?
A. 86.9 N B. 84.6 N C. 75.8 N D. 30.8 N E. 38.5 N
Earth satellites are typically more than 100 km high so as to be above Earth's
A) atmosphere. B) gravitational field. C) both of these
A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20° and increasing at the rate of 10°/s, what is the magnitude of the induced emf in the loop?
A. 13 mV B. 0.27 V C. 4.8 mV D. 14 mV E. 2.2 mV
The accelerating force of the wind on a small 250-kg sailboat is 707 N northeast. If the drag of the keel is 500 N acting west, what is the acceleration of the boat?
a. 1.5 m/s2 due east c. 3.0 m/s2 northeast b. 2.5 m/s2 due north d. 2.0 m/s2 due north