The Andromeda Galaxy (M31) is what type?
a. Spiral
b. Irregular
c. Elliptical
d. Regular spiral
a
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How far from a lens of focal length 50.0 mm must the object be placed if it is to form a virtual image magnified in size by a factor of three?
A) 33.3 mm B) 48.0 mm C) 38.3 mm D) 42.2 mm E) 54.4 mm
Two speakers in a stereo emit identical pure tones. As you move around in front of the speakers, you hear the sound alternating between loud and zero. This occurs because of
a. interference. b. changing sound level. c. diffraction. d. the Doppler effect. e. shock waves.
Which of these singly ionized atoms of the same speed will curve most in a magnetic field?
A) helium B) iron C) uranium D) all the same
What centripetal force does an 80.0-kg passenger experience when seated 10.0 m from the center of a Ferris wheel whose angular speed is 0.500 rad/s?
a. 2.00 N b. 24.5 N c. 400 N d. 200 N