Simple Pendulum: A pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0-kg sphere suspended from a 67.0-m light cable. How long would it take for the bob in this pendulum to move from the position of maximum displacement down to the equilibrium point?
A. 4.11 s
B. 21.5 s
C. 2.58 s
D. 32.2 s
E. 42.9 s
Answer: A
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A baseball catcher puts on an exhibition by catching a 0.175-kg ball dropped from a helicopter at a height of 89.0 m. What is the speed of the ball just before it hits the catcher's glove 1.00 m above the ground? (g = 9.80 m/s2 and ignore air resistance)
a. 41.5 m/s b. 0.482 m/s c. 1 730 m/s d. 29.4 m/s e. 42.0 m/s
The galactic _______________ contains very little gas and dust, old stars, and globular clusters
Fill in the blank(s) with correct word
Thin Lenses: Which statement about a single thin lens is correct?
A. A converging lens always produces a real inverted image. B. A diverging lens always produces a virtual inverted image. C. A converging lens sometimes produces a real upright image. D. A diverging lens always produces a virtual upright image. E. A diverging lens produces a virtual upright image only if the object is located between the lens and its focal point.
The cones in the retina of the eye are
A) most densely packed at the center of vision. B) uniformly spread along the visual field. C) concentrated along the periphery of vision.