Light strikes a diamond (n = 2.42) immersed in glycerin (n = 1.473) at an angle of 60° relative to the normal to the surface. What is the angle of refraction?
a. 20°
b. 60°
c. 32°
d. 64°
e. 15°
c
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Which of the following statements about Mars is not true?
A) We could survive on Mars without spacesuits, as long as we brought oxygen in scuba tanks. B) We have landed robotic spacecraft on its surface. C) It has mountains that are taller than the tallest mountains on Earth. D) Its surface is frozen today, but evidence indicates it had flowing water in the distant past.
A 10-N falling object encounters 4 N of air resistance. The net force on the object is
A) 0 N. B) 4 N. C) 6 N. D) 10 N. E) none of the above
An unfueled 1000-kg experimental rocket sled at rest on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20 s "burn.". The rocket moves at 160 m/s after the burn. What average force is experienced by the rocket during the burn?
a. 0.80 × 10^4 N c. 0.60 × 10^4 N b. 0.75 × 10^4 N d. 0.35 × 10^4 N
Solar prominences have twisted and looped shapes because of the solar magnetic field
Indicate whether the statement is true or false