In radioactive dating, carbon-14 is often used. This nucleus emits a single beta particle when it decays. When this happens, the resulting nucleus is
A)
still carbon-14.
B)
boron-14.
C)
nitrogen-14.
D)
carbon-15.
E)
carbon-13.
C
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a. zero b. reversed c. greatest d. least
When a molecule collides with another that is approaching with greater momentum, its rebound speed
1) stays the same, 2) increases, 3) decreases, and when a molecule collides with another that is receding, its rebound speed 4) stays the same. 5) increases. 6) decreases.
A thin rod of mass M and length L is struck at one end by a ball of clay of mass m, moving with speed v as shown in the figure. The ball sticks to the rod. After the collision, the angular momentum of the clay-rod system about A, the midpoint of the rod, is
A. (m + M/3)(vL/2) B. (m + M/12)(vL/2) C. (m + M/6)(vL/2) D. mvL/2 E. mvL
The average power delivered by an AC generator in an RLC circuit is ________ the product IV where I & V are respectively the current and voltage amplitudes
A) equal to B) more than C) less than