Exhibit 4-2Newton approximated motion in a circle as a series of linear motions, as in the polygon below.
Assume that the particle moves at constant speed vA from A to B, and at constant speed vB from B to C.Use this exhibit to answer the following question(s).
Refer to Exhibit 4-2. The direction of the acceleration, 
, at point B, is shown by the arrow in
A.
B.
C.
D.
E.
Answer: C
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Two simple pendulums of equal length l = 0.45 m are suspended from the same point. The pendulum bobs are small solid steel spheres. The first bob is drawn back to make a 35° angle with the vertical, while the other one is left hanging at rest
If the first bob has a mass of 0.25 kg and the second has a mass of how high will the second bob rise above its initial position when struck elastically by the first bob after it is released? A) 2.7 cm B) 3.3 cm C) 4.4 cm D) 3.9 cm
Some household appliances have plugs with two prongs while others have three prongs. The additional prong is
A. for direct current. B. for 120-Hz voltage. C. to connect to ground. D. for additional mechanical strength. E. for 240-Hz voltage.
How can the description of the atom given by the Schrödinger equations be visualized?
a. As a sphere with electrons distributed through a solid positively charged core, like a plum pudding. b. As a miniature solar system. c. As a nucleus surrounded by an electron cloud. d. As a positively charged nucleus connected to a negatively charged electron shell by a spring. e. An empty box with just one atomic particle in it.
All stars produce an absorption spectra
a. True b. False Indicate whether the statement is true or false