The image produced by a single diverging lens will ALWAYS be
A. inverted and virtual.
B. erect and real.
C. erect and virtual.
D. inverted and real.
E. at infinity.
Answer: C
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Constant Acceleration Kinematics: A soccer ball is released from rest at the top of a grassy incline. After 6.4 seconds the ball has rolled 91 m with constant acceleration, and 1.0 s later it reaches the bottom of the incline.(a) What was the ball's acceleration?(b) How long was the incline?
What will be an ideal response?
A small 1.4-N stone slides down a frictionless bowl, starting from rest at the rim. The bowl itself is a hemisphere of radius 75 cm. Just as the stone reaches the bottom of the bowl, how hard is the bowl pushing on it?
A) 0.70 N B) 1.4 N C) 2.8 N D) 4.2 N E) 5.6 N
The objectives of two astronomical telescopes have the same focal length but one objective has double the diameter of the other. An advantage of the telescope with the larger objective is
A) its higher power. B) its greater aberration. C) its higher price. D) its brighter image. E) its lower aberration.
A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
A) 20 W. B) 50 W. C) 100 W. D) 1000 W. E) 20,000 W.