What is the speed of light in a material that has an index of refraction of 2.0?
A. 
B. 
C. 
D. 
E. No such index can exist.
B.
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Neutron stars do NOT have
A) sizes comparable to large cities. B) large surface gravities, compared to the Sun. C) masses greater than 1.4 solar masses. D) strong magnetic fields. E) rotation periods comparable to the Sun's.
A rocket is traveling away from Earth at 90% the speed of light. The captain turns on a laser light
What is the speed of the light as measured by an Earth-based astronomer if the captain aims the laser (a) directly forward or (b) directly backward?
A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 225 grams of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 × 10^5 J/kg)
Why is guayule particularly useful? Explain
What will be an ideal response?