Energy in Inductors: You need an inductor that will store 20 J of energy when a 3.0-A current flows through it. What should be its self-inductance?
A. 4.4 H
B. 90 H
C. 60 H
D. 3.7 H
Answer: A
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Magnetic Field of a Long Wire: A long straight wire has a constant current flowing to the right. A rectangular metal loop is situated above the wire, and also has a constant current flowing through it, as shown in the figure. Which one of the following statements is true? 
A. The net magnetic force on the rectangle is upward, and there is also a nonzero torque on the rectangle. B. The net magnetic force on the rectangle is zero, and the net torque on it is zero. C. The net magnetic force on the rectangle is downward, and there is also a nonzero torque on the rectangle. D. The net magnetic force on the rectangle is zero, but there is a nonzero torque on the rectangle. E. The net magnetic force on the rectangle is downward, and the net torque on it is zero.
The Murchison meteorite, a carbonaceous chondrite, contained many of the amino acids needed by living things on Earth
Indicate whether the statement is true or false
Just as torque is the rotational analogue of force in linear motion, rotational inertia is the rotational analogue of ________ in linear motion.
Fill in the blank(s) with the appropriate word(s).
At what angle must a fish underwater look in order to see a fisherman at the shore? (Note: n for water is 1.33.)
A) 41.2° B) 48.8° C) 60.0° D) 36.9° E) 90.0°