The speed of a seismic wave depends on
A) the type of material it travels through.
B) how far it has to travel.
C) its amplitude.
D) its frequency.
Answer: A
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An object is located in front of a converging lens with focal length F as shown. The image can be described as
A. upright, magnified, and real.
B. upright, diminished, and virtual.
C. inverted, diminished, and real.
D. inverted, magnified, and virtual.
A closed loop conductor that forms a circle with a radius of 2.0 m is located in a uniform but changing magnetic field
If the maximum emf induced in the loop is 5.0 V, what is the maximum rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies? A) 0.40 T/s B) 2.5 T/s C) 0.080 T/s D) 5.0 T/s
A bullet is fired horizontally with an initial velocity of 300 m/s from a 20-m high tower. If air resistance is negligible, the bullet hits downrange about
A) 200 m. B) 300 m. C) 400 m. D) 500 m. E) 600 m.
Two cooks standing side by side in a restaurant pull their beaters out of the dough at the same instant. A glob of dough flies off each beater. Each glob lands on the top of a tin the same horizontal distance away and at its initial height. However, one lands later than the other. The explanation is that they left the beaters at angles ?1 and ?2 such that:
a.
?2 = ??1.
b.
?1 + ?2 = 
.
c.
?1 + ?2 = 
.
d.
?1 + ?2 = ?.
e.
?1 ? ?2 = ?.