The electric charge of all electrons
A) vary from atom to atom.
B) vary from ion to ion.
C) are identical.
Answer: C
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In a certain one-lane road there are no entrances or exits. As the road passes through open country and populated areas, the speed limit changes. Assume that cars travel at the posted speed limit
In the open road, where the speed limit is 55 mph, the cars are spaced so there are 51 cars per mile. If the flow of cars is steady, how many cars per mile are there in a stretch of road where the speed limit is 40 mph? A) 56 cars/mile B) 60 cars/mile C) 66 cars/mile D) 70 cars/mile E) 76 cars/mile
A baseball player throws a ball straight up into the air. At a height of 3.00 m above the release point, the ball is moving at 1.25 m/s. What was the ball's initial speed?
a. 7.56 m/s b. 7.77 m/s c. 57.2 m/s d. 60.4 m/s
Consider the curve f(x) = A cos(2?x/?). The wavelength of the wave will be:
a.
the distance 0 to A.
b.
twice the distance 0 to A.
c.
the distance x2 to x3.
d.
twice the distance x2 to x3.
The maximum sediment load of a stream depends on
A) average stream speed. B) channel geometry. C) stream gradient. D) stream discharge.