Superposition of waves can occur
A. in transverse waves.
B. in longitudinal waves.
C. in sinusoidal waves.
D. in all of the above.
E. only in (a) and (c) above.
Answer: D
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Which of the following would not be considered evidence for dark matter in clusters of galaxies?
A) the total amount of stars B) the temperature of the intergalactic gas C) the velocities and radii of galaxy orbits around the center of mass in the cluster D) the curvature of gravitationally-lensed galaxies
Molly measures a Hubble constant of 20 km/sec/million light-years. Sam measures a Hubble constant of 25 km/sec/million light-years. All other assumptions being the same, which person would estimate a LARGER age to the universe?
A) Sam B) Molly C) They both would measure the same age.
A package is dropped from a helicopter that is moving upward at 15 m/s If it takes before the package strikes the ground, how high above the ground was the package when it was released? Neglect air resistance
What will be an ideal response?
The light bulbs in this circuit are connected in
a.
parallel.
b.
series.
c.
neither parallel nor series.
d.
a short circuit.