My flashlight beam makes an angle of 60. degrees with the surface of the water before it enters the water. In the water what angle does the beam make with the surface?
A) 0°
B) 30°
C) 60°
D) 22°
E) 68°
E
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Phil stands at rest with both feet on a scale that reads 500 N. When he gently lifts one foot, the scale reads
A) less than 500 N. B) 500 N. C) more than 500 N.
From the Sun, the distance to the Galactic Center is about:
A) 8 pc. B) 8,000 pc. C) 100,000 pc. D) 225 million pc. E) 100 billion pc.
Which characterizes the main result of the Michelson-Morley experiment?
a. verified the existence of ether b. involved measuring the speed of sound from a moving source c. detected no difference in the speed of light regardless of speed of the source relative to observer d. was designed purposely to verify Einstein's theory of relativity
Consider the following two statements and then select the option below that is correct
i. It is possible for an object to move in the absence of forces acting on the object. ii. It is possible to have forces acting on an object in the absence of motion of the object.
1.The second statement is the only correct one. 2.Both statements are correct. 3.Neither statement is correct. 4.The first statement is the only correct one.