A metal rod of length L in a region of space where a constant magnetic field points into the page rotates about an axis through its center at constant angular velocity ?. The ends, A and E, make contact with a split ring that connects to an external circuit. The current in the external circuit of resistance R has magnitude
A.
0.
B.
.C.
.D.
.E.
.Answer: A
Physics & Space Science
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Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete one orbit?
A. 320 days B. 160 days C. 20 days D. 80 days
Physics & Space Science
With no air resistance, a projectile fired at 60° has the same range as if it were fired at
A) 15°. B) 30°. C) 45°. D) 75°.
Physics & Space Science
A 650-N tightrope walker stands at the center of the rope such that each half of the rope makes an angle of 10.0° with the horizontal. What is the tension in the rope?
a. 1 870 N b. 660 N c. 3 740 N d. 226 N e. 1 840 N
Physics & Space Science
In large molecules, the fundamental repeating units are called ______________
Fill in the blank(s) with correct word
Physics & Space Science