Refraction occurs when light passing from one medium to another
A) changes frequency.
B) changes speed.
C) loses energy.
D) reflects inward.
Answer: B
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An isolated object is initially spinning at a constant speed. Then, although no external forces act upon it, its rotational speed increases. This must be due to
A. a decrease in the moment of inertia. B. an increase in the mass. C. an increase in the moment of inertia. D. an increase in the angular momentum. E. impossible, angular momentum conservation is violated.
The cause of the pulsations we see in the light from neutron stars is
A) the in and out pulsations of star's radius, as the star gets rapidly larger and then smaller. B) pulsations of its neutrons. C) the spinning motion of the star. D) motions of electrons within the star. E) Nonsense--neutron stars do not pulsate.
The formula mass for C2H6 is ______________
Fill in the blank(s) with correct word
Adiabatic Processes: A monatomic ideal gas expands adiabatically from an initial volume of 72 L and an initial temperature of 350 K until its temperature falls to 290 K. What is the final volume of the gas?
A. 95 L B. 98 L C. 101 L D. 104 L E. 142 L