The figure shows a cross section of three parallel wires each carrying a current of 20 A. The currents in wires A and B are out of the paper, while that in wire C is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 2.0-m length of wire A?
a.
23 mN
b.
64 mN
c.
32 mN
d.
46 mN
e.
55 mN
c
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Waves on a String: The density of aluminum is 2700 kg/m3. If transverse waves travel at 38 m/s in an aluminum wire of diameter 4.6 mm, what is the tension on the wire?
A. 65 N B. 39 N C. 52 N D. 78 N
A hydrogen atom consists of a proton and an electron. If the orbital radius of the electron increases, the electric potential energy of the electron-proton system
A) increases. B) decreases. C) remains the same. D) depends on the zero point of the potential.
The concept of the dual nature of light indicates that electromagnetic waves sometimes act like ______________
Fill in the blank(s) with correct word