Spring tides occur when the Moon is in
a) new phase.
b) waxing gibbous phase.
c) first-quarter phase.
d) waning gibbous phase.
a
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A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the z axis from z = 0 to z = 3.0m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?
A. 1.0 N B. 5.0 N C. 2.0 N D. 3.6 N E. 3.0 N
The current in a long wire creates a magnetic field in the region around the wire. How is the strength of the field at distance r from the wire's center related to the magnitude of the field?
a. field directly proportional to r c. field directly proportional to r2 b. field inversely proportional to r2 d. field inversely proportional to r
What is the total energy stored in the group of capacitors shown if the charge on the 30-?F capacitor is 0.90 mC?
A. 29 mJ B. 61 mJ C. 21 mJ D. 66 mJ E. 32 mJ
A stone is thrown straight up. What is its acceleration on the way down?
What will be an ideal response?