vx is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?
?
?
A. ?2.0 m
B. +2.0 m
C. +1.0 m
D. ?1.0 m
E. 6.0 m
Answer: D
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Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
and 
, what is the direction of the vector 
?
A. ?49°
B. ?41°
C. ?90°
D. +49°
E. +21°
Charge of uniform density (80 nC/m3) is distributed throughout a hollow cylindrical region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 4.0 mm from the symmetry axis.
A. 7.9 N/C B. 10 N/C C. 9.0 N/C D. 8.9 N/C E. 17 N/C
When the input piston of a hydraulic press is depressed 20 cm, the output piston is observed to move 1 cm. An input force of 1 N can raise no more than
A) 1 N. B) 10 N. C) 20 N. D) 21 N.
The major source of CO pollution is
a. combustion for electrical generation. b. industry. c. domestic heating. d. transportation.