Two point sources of light of wavelength 600 nm are being viewed by a telescope of aperture width 2.0 cm. What is the closest angular separation at which the two sources can be resolved?
a. 
b. 
c. 
d. 
e. 
b.
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A mass of 0.150 kg is attached to a spring with a force constant of 3.58 N/m and undergoes simple harmonic oscillations. What is the period of the oscillations?
A) 2.57 s B) 0.527 s C) 0.263 s D) 1.14 s E) 1.29 s
A car (of mass 1500 kg) and a small truck (of mass 2000 kg) collide suddenly at right angles at an icy intersection
The car was originally traveling eastward at 20.0 m/s and the truck was traveling northward at 20.0 m/s just before the collision took place. What is the speed of the combined wreck just after the collision if the vehicles become enmeshed?
Which of the following best explains why the Moon's orbital period and rotation period are the same?
A) The Moon once rotated faster, but tidal friction slowed the rotation period until it matched the orbital period. B) The Moon was once closer to Earth, but the force of gravity got weaker as the Moon moved farther away. C) The law of conservation of angular momentum ensured that the Moon must have the same amount of rotational angular momentum as it has of orbital angular momentum. D) The equality of the Moon's orbital and rotation periods is an extraordinary astronomical coincidence.
The Kuiper Belt is at a distance of about 30 AU from the Sun
Indicate whether the statement is true or false