Elastic Collisions: A 320-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 270-g cart. What is the speed of the 270-g cart just after the collision?
A. 0.678 m/s
B. 0.106 m/s
C. 1.36 m/s
D. 1.14 m/s
E. 2.72 m/s
Answer: C
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Uranium-238 decays to Thorium-234 by emitting which of the following?
a. beta b. alpha c. gamma d. positron
Energy Levels: What is the energy required to remove the electron from a hydrogen atom in the n = 11 state?
A. 0.112 eV B. 1.24 eV C. 13.5 eV D. 12.4 eV E. 0.141 eV
If Q = 16 nC, a = 3.0 m, and b = 4.0 m, what is the magnitude of the electric field at point P?
a.
33 N/C
b.
31 N/C
c.
24 N/C
d.
19 N/C
e.
13 N/C
The electric field in a region of space is given by Ex = (3.0x) N/C, Ey = Ez = 0, where x is in m. Points A and B are on the x axis at xA = 3.0 m and xB = 5.0 m. Determine the potential difference VB?VA.
A. ?24 V B. +24 V C. ?18 V D. +30 V E. ?6.0 V