The theory of special relativity
A) is based on a complex mathematical analysis.
B) does not agree with electromagnetic theory.
C) does not agree with Newtonian mechanics.
D) has not been verified by experiment.
C
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5.0 A at 110 V flows in the primary of a transformer. Assuming 100% efficiency, how many amps at 24 V can flow in the secondary?
A) 1.1 A B) 4.6 A C) 5.0 A D) 17 A E) 23 A
A beam of electrons is sent in the positive x direction in a region with a uniform magnetic field B in the positive y direction and a uniform electric field E in the positive z direction. At which of the following speeds would the electrons be deflected in the positive z direction?
a. v = E/B b. There is no speed for which this will happen. c. v < E/B d. v > E/B
Why do we use fuses?
a. to eliminate shock hazards b. to prevent fires c. to save on the cost of electricity d. to store charge
If the average density of the universe is less than the critical density, the universe is open
Indicate whether the statement is true or false