In a system with two moving objects, when a collision occurs between the objects:
a. the total kinetic energy is always conserved.
b. the total momentum is always conserved.
c. the total kinetic energy and total momentum are always conserved.
d. neither the kinetic energy nor the momentum is conserved.
b
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What is the longest wavelength in the Balmer series?
A) 240 nm B) 328 nm C) 365 nm D) 656 nm E) 820 nm
A particle has a total energy that is less than that of a potential barrier. When the particle penetrates the barrier, its wave function is
a. a positive constant. b. exponentially increasing. c. oscillatory. d. exponentially decreasing. e. none of the above.
Exhibit 12-3
The graph below shows a plot of angular velocity in rad/s versus time in s from t = 0 s to t = 7 s.
?
?
Use this exhibit to answer the following question(s).
Refer to . The angular position, ?, at t = 0 s is 3.0 rad, clockwise. The angular position, ?, at t = 7 s is
a.
27 rad, CW.
b.
27 rad, CCW.
c.
33 rad, CW.
d.
33 rad, CCW.
e.
36 rad, CCW.
The acceleration of a ball as it rolls down a ramp is 4 m/s2 . The ball is referred to 2 s after it starts to roll. A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is
a. 0 d. 8 m/s2 b. 0.2 m/s2 e. 16 m/s2 c. 4 m/s2