A gas is confined to a cylindrical container of radius 1 cm and length 1 m. The pressure exerted on an end face, compared with the pressure exerted on the long curved face, is:
A. smaller because its area is smaller
B. smaller because most molecules cannot traverse the length of the cylinder without undergoing collisions
C. larger because the face is flat
D. larger because the molecules have a greater distance in which to accelerate before they strike the face
E. none of these
Ans: E. none of these
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A. 0.200
B. 0.290
C. 4.29
D. 3.71
E. 0.800
Conservation of Momentum: A 14,000-kg boxcar is coasting at 1.50 m/s along a horizontal track when it suddenly hits and couples with a stationary 10,000-kg boxcar. What is the speed of the cars just after the collision?
Fill in the blank(s) with the appropriate word(s).
Two 10¢ coins (dimes) carrying identical charges are lying 2.5 m apart on a table
If each of these coins experiences an electrostatic force of magnitude 2.0 N due to the other coin, how large is the charge on each coin? (k = 1/4??0 = 9.0 × 109 N ? m2/C2) A) 2.6 ?C B) 26 ?C C) 6.7 ?C D) 5.2 ?C E) 52 ?C
Three boxes in contact rest side-by-side on a smooth, horizontal floor. Their masses are 5.0-kg, 3.0-kg, and 2.0-kg, with the 3.0-kg box in the center. A force of 50 N pushes on the 5.0-kg box, which pushes against the other two boxes
(a) Draw the free-body diagrams for each of the boxes. (b) What magnitude force does the 3.0-kg box exert on the 5.0-kg box? (c) What magnitude force does the 3.0-kg box exert on the 2.0-kg box?