The light blue ellipse represents tidal bulges. In what way are these bulges drawn inaccurately?
A) There should be only one bulge rather than two.
B) They should be aligned with the Sun rather than the Moon.
C) They should be much smaller compared to Earth.
D) They should be more pointy in shape.
C) They should be much smaller compared to Earth.
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A copper cable needs to carry a current of 200 A with a power loss of only 3.0 W/m. What is the required radius of the copper cable? (The resistivity of copper is 1.7 ´ 10-8 W×m.)
1) 0.21 cm 2) 0.85 cm 3) 3.2 cm 4) 4.0 cm 5) 4.7 cm
Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. 
At what value of t is the speed of the particle equal to 0 m/s?
A. 0 s B. 1 s C. 2 s D. 3 s E. 4 s
perpendicular to the jet’s path from left to right, which part of the airplane becomes negatively charged?
A. Its nose B. Its tail C. Its top D. Its bottom E. Its left wing F. Its right wing T. (No part becomes charged.)
An electromagnetic wave with a peak magnetic field component of 3.20 × 10^?7 T carries what average power per unit area? (?0 = 4? × 10^?7 T?m/A, ?0 = 8.85 × 10^?12 C2/N?m2 and c = 3.00 × 10^8 m/s)
a. 38.4 W/m2 b. 24.4 W/m2 c. 12.2 W/m2 d. 3.82 W/m2 e. 7.64 W/m2