Which of the following terms is(are) used to describe a division of a stream's load?
a. Bed load only.
b. Suspended load only.
c. Dissolved load only.
d. All of the above
d
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A mouse is running away from a cat at 0.75 m/s and, at 1.25 m from his mouse hole, he accelerates at a constant rate of 0.25 
until he reaches his hole safely. How long a time was required for him to cover the last 1.25 m?
A. 1.4 s B. 1.7 s C. 1.2 s D. 10 s
Suppose you live at latitude 20°S. Based on the given right ascensions and declinations, which of the following stars passes closest to your zenith on its daily path through your sky?
A) Sirius: RA = 6hr 45m, dec = -16°42' B) Canopus: RA = 6hr 24m, dec = -52°41' C) Alpha Centauri: RA = 14hr 40m, dec = -60°50' D) Arcturus: RA = 14hr 16m, dec = +19°11' E) Vega: RA = 18hr 37m, dec = +38°47'
Two parallel straight wires carry currents in the same direction. The magnetic forces between the wires are such that
A) the wires feel a clockwise torque. B) they are pulled in the direction of the wires. C) the wires repel each other. D) the wires attract each other.
If two bicyclists move around a circular track of radius 100 m, at the same speed, 10 m/s, but in opposite directions, then
A. they have equal size accelerations, 1 m/s2. B. they might have different accelerations, depending on whether they have identical mass or not. C. they have opposite accelerations, +1 m/s2 (inward) and -1 m/s2 (outward). D. one has centripetal acceleration of 1 m/s2 and the other has centrifugal acceleration of 1 m/s2.