Which of the following are not produced by streams?
A) floodplains
B) deltas
C) moraines
D) alluvial fans
Answer: C
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If you know the impulse that has acted on a body of mass m you can calculate
a. its initial velocity. b. its final velocity. c. its final momentum. d. the change in its velocity. e. its acceleration during the impulse.
A helium-neon laser emits red light having a wavelength of 632.8 nm and a power of 1.85 mW. How many photons are emitted each second? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 nm = 10?9 m)
a. 5.9E+15 b. 3.7E+34 c. 5.9E+24 d. 5.9E+18 e. 1.2E+17
A tiny spring, with a spring constant of 1.30 N/m, will be stretched to what displacement by a 0.00500-N force?
a. 3.85 mm b. 7.69 mm c. 11.5 mm d. 6.50 mm e. 3.25 mm
A 1.00 mW laser produces photons of wavelength 633 nm. How many photons per second does the laser emit?
a. 
b. 
c. 
d. 
e. 