The movement of a glacier is fastest
A) at the bottom.
B) at its surface.
C) in the middle.
D) along the sides.
Answer: B
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Potential of Point-Charges: The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of +Q is located at one of the corners of the square. What is the potential (relative to infinity) at the center when each of the other corners is also contains a point charge of +Q?
A. 0 V B. 3.0 V C. 9.0 V D. 12 V
A vector has components Ax > 0, and Ay < 0, the angle that this vector makes with the positive x-axis must be in the range
A) 0° to 90°. B) 90° to 180°. C) 180° to 270°. D) 270° to 360°.
A 25-?F capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, with the two positive plates connected and the two negative plates connected. The final potential difference across the 25-?F capacitor is 36 V. What is the value of the capacitance of C?
A. 43 ?F B. 29 ?F C. 22 ?F D. 58 ?F E. 63 ?F
A hydraulic lift raises a 2 000-kg automobile when a 500-N force is applied to the smaller piston. If the smaller piston has an area of 10 cm2, what is the cross-sectional area of the larger piston?
a. 40 cm2 b. 80 cm2 c. 196 cm2 d. 392 cm2 e. 160 cm2