A hunter aims a rifle at an angle of 10° above the horizontal. The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle. The bullet to hit the ground first is
A) the dropped one.
B) the fired one.
C) both hit at the same time
Answer: A
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From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball downwards with the same initial speed. Neglect air. When they reach the ground below
A) the green ball will be moving faster than the blue ball. B) the blue ball will be moving faster than the green ball. C) the two balls will have the same speed.
Within the field of geography, most geographers consider themselves to be either a
What will be an ideal response?
Water flows over a 2-m-wide flat plate with the same velocities as in Problem 4 in the mini-exam for Section 4.4 where we found v = 0.0667 m/s. The frictional force F acting on the horizontal surface is nearest:
(A) 1300 N
(B) 1500 N
(C) 1700 N
(D) 1900 N
If the rotating coil used in a generator has its radius doubled, what change results in the amplitude of the voltage produced?
a. It doubles. c. It is increased by a factor 23/2. b. It quadruples. d. It stays the same.