The magnification for a flat mirror:
a. is a function of the image distance.
b. is a function of the object distance.
c. is a function of the object and image distances.
d. is 1.
D
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If life exists on Mars today, it will most likely be found
A) on the surface B) at the center of the planet C) beneath the surface where liquid water may still exist D) floating high in the atmosphere
Two particles (m1 = 0.20 kg, m2 = 0.30 kg) are positioned at the ends of a 2.0-m long rod of negligible mass. What is the moment of inertia of this rigid body about an axis perpendicular to the rod and through the center of mass?
a. 0.48 kg/m2 b. 0.50 kg/m2 c. 1.2 kg/m2 d. 0.80 kg/m2 e. 0.70 kg/m2
The region of a shadow that is totally shaded is known as the _____
A) umbra B) waxing crescent C) penumbra D) waxing gibbous
Why was the globular cluster M13 selected as the target for the 1974 Arecibo message?
A) globular clusters are the most likely place to find stars with planetary systems B) stars in globular clusters are rich in heavy elements, the building blocks of life C) signals from advanced civilizations have previously been detected coming from this cluster D) globular clusters are densely packed with stars, hence maximizing the probability of interception by an advanced civilization