When a glass rod is rubbed with silk, which of the following statements best describes what happens?
a. Electrons are removed from the rod.
b. Protons are removed from the silk.
c. The silk is charged positively.
d. The silk remains neutral.
a
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Potential of Point-Charges: Two very small +3.00-?C charges are at the ends of a meter stick. Find the electric potential (relative to infinity) at the center of the meter stick. (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 0.00 V B. 2.70 × 104 V C. 5.40 × 104 V D. 1.08 × 105 V
The person who expounded the uncertainty principle was __________
Fill in the blank(s) with correct word
Which of the following nuclear fuels does a twenty-solar-mass star NOT fuse over the course of its entire evolution?
a. hydrogen b. carbon c. nitrogen d. oxygen e. iron
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