Padded dashboards in cars are safer in an accident than non-padded ones because passengers hitting the dashboard encounter
A) lengthened time of contact.
B) shorter time of contact.
C) decreased impulse.
D) increased momentum.
Answer: A
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If the average density of matter and energy in the Universe equals the critical density, space-time will be _____
A) finite B) flat C) positively curved D) negatively curved
Compton Scattering: A certain photon, after being scattered from a free electron that was at rest, moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the energy of the scattered photon? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 1.05 × 1016 J B. 2.10 × 1016 J C. 5.71 × 1016 J D. 3.34 × 1016 J E. 4.21 × 1016 J
Determine the resonant frequency of the circuit
a.
159 Hz
b.
32 Hz
c.
5 Hz
d.
500 Hz
e.
79.5 Hz
Water movement in a wave in the surf zone is characterized by
A) steepened wave height and longer wavelength. B) steepened wave height and shorter wavelength. C) a surfable wave crest and increased wavelength. D) shallow water depth and a steepened long wavelength.