A long solenoid (n = 80 turns/cm) carries a current of 70 mA. Determine the magnitude of the magnetic field inside the solenoid
7.0 gauss
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What is the average power dissipation in a series RC circuit if R = 5.00 k?, C = 2.00 ?F, and V = 170 cos (300t)?
a. 0.930 W b. 2.60 W c. 28.2 W d. 157 W e. 5.20 W
A greater gravitational field causes time to
A) speed up. B) slow down. C) fluctuate. D) Gravity has no measurable effect on time.
Can an element decay "backward" in the periodic table, to a lower atomic number?
A) No, in fact elements cannot alter their atomic number by radioactive decay. B) No, but an element can decay to a higher atomic number. C) Yes, by beta decay. D) Yes, by alpha decay. E) Yes, radioactive decay always causes elements to decay to a lower atomic number.
Which of the following divisions of time cannot be changed by a human decision?
a. 60 minutes in an hour b. 365.2422 days in a year c. 7 days in a week d. 24 hours in a day