The fusion of Li and N results in creation of
A) O and no energy transformed to other forms.
B) He and energy transformed to other forms.
C) He and no energy transformed to other forms.
D) salami and cheese sandwiches.
E) O and energy transformed to other forms.
E
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Motorcycle Mike is traveling behind an ambulance with a speed of 40 mph. The ambulance, traveling in the same direction, has a speed of 70 mph. When Mike hears the ambulance's siren, the frequency is _______ the actual frequency.
A. higher than B. the same as C. lower than
While many elemental spectral lines are visible, almost all molecular lines lie in the ________ portion of the spectrum, since they are at much lower energy
A) infrared B) radio C) X-ray D) ultraviolet E) visible light
A quick jerk on a sheet of paper beneath a box of cereal doesn't topple the box, which best illustrates that
A) the box has no acceleration. B) there is an action-reaction pair of forces. C) gravity tends to hold the box secure. D) the box has inertia.
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x = 5.0 cos (?t). The magnitude of the acceleration (in m/s2) of the body at t = 1.0 s is approximately
a. 3.5 b. 49 c. 14 d. 43 e. 4.3