A falling 1-N apple hits the ground with a force of about
A) 1 N.
B) 2 N.
C) 4 N.
D) 10 N.
E) need more information
Answer: E
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Since there are no folded mountain chains on the Moon, what does this imply about the Moon's geology? a. Plate tectonics does not exist on the moon
b. The geological history is extremely short. c. Mountains were worn down by erosion. d. Mountains were destroyed during the heavy bombardment. e. Mountains were destroyed during the heavy bombardment.
Increasing the mass m of a mass-and-spring system causes what kind of change on the resonant frequency of the system?
A) The frequency increases. B) The frequency decreases. C) There is no change in the frequency. D) The frequency increases if the ratio k/m is greater than or equal to 1 and decreases if the ratio k/m is less than 1. E) The frequency increases if the ratio k/m is less than or equal to 1 and decreases if the ratio k/m is greater than 1.
A ball is whirled on the end of a string in a horizontal circle at constant speed. Suddenly, the string breaks. Immediately after the string breaks, the ball will
A. have a horizontal velocity that is tangential to the circle. B. have no horizontal velocity. C. have a horizontal velocity toward the center of the circle. D. have a horizontal velocity partly in away from the center of the circle and partly tangent to the circle. E. have a horizontal velocity away from the center of the circle.
Which of the following is not a standard metric unit?
a. Kilogram b. Meter c. Second d. Gram