The position of a mass that is oscillating on a spring is given by x = (12.3 cm) cos[(1.26 s2)t]. What is the acceleration of the mass when t = 0.825 s?
A) 9.89 cm/s2
B) -9.89 cm/s2
C) 10.6 cm/s2
D) -10.6 cm/s2
E) 0 cm/s2
B
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In the Ptolemaic model of the solar system, Venus should exhibit which of the following phases?
A) crescent B) new C) full D) A and B E) B and C
A billiard ball collides in an elastic head-on collision with a second stationary identical ball. After the collision which of the following conditions applies to the first ball?
a. maintains the same velocity as before c. comes to rest b. has one-half its initial velocity d. moves in the opposite direction
Angular Momentum: If the answer to your calculation has units of kg ? m2/s2, what type of quantity could it be? (There could be more than one correct choice.)
A. force B. work C. angular momentum D. linear momentum E. power F. rotational kinetic energy G. moment of inertia H. torque
The circuit below contains 3 100-W light bulbs and a capacitor. The emf is 110 V. Which light bulb(s) is(are) brightest? (Assume the capacitor is fully charged.)
a.
A
b.
B
c.
C
d.
A and B
e.
All three are equally bright.