In order for a body to exhibit simple harmonic motion there must be
A. a force drawing the body toward the center and decreasing with distance away from the center.
B. a force drawing the body toward the center and increasing with distance away from the center.
C. a constant force drawing the body toward the center.
D. a constant force pushing the body away from the center.
E. a force pushing the body away from the center and increasing with distance away from the center.
Answer: B
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Light has a wavelength of 600 nm in a vacuum. It passes into glass, which has an index of refraction of 1.50. What is the wavelength of the light in the glass?
A) 600 nm B) 500 nm C) 400 nm D) 300 nm E) 200 nm
What do CAIs include?
a. carbon and aluminum b. carbon and ammonium c. calcium and argon d. chlorine and argon e. calcium and aluminum
This image shows the velocity of gas moving toward or away from us on the Sun's surface, as measured through Doppler shifts; the key indicates the measured velocity, with negative velocities indicating gas moving toward us and positive velocities away from us. What do the small-scale changes in the shading represent in this map?
A) vibrations of gas moving up or down at the solar surface B) variations in the altitude of the solar surface C) variations in the temperature of the photosphere D) Nothing; this is an artist's rendering of the sun.
A conducting bar of length L rotates with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, VA ? VP?
a.
?12 mV
b.
+8.0 mV
c.
?8.0 mV
d.
+12 mV
e.
?16 mV