A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is 1,200 W
a. True
b. False
Indicate whether the statement is true or false
True
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A 200-volt battery is connected to a 0.50-microfarad parallel-plate, air-filled capacitor. Now the battery is disconnected, with care taken not to discharge the plates. Some Pyrex glass is then inserted between the plates, completely filling up the space. What is the final potential difference between the plates? (The dielectric constant for Pyrex is ? = 5.6.)
What will be an ideal response?
The magnetic field lines about a straight current-carrying wire are
A) circular. B) radial. C) elliptical. D) spiral.
A series RC circuit has a time constant of 0.900 s. The battery has an emf of 24.0 V, and the maximum current in the circuit is 0.500 mA.What is the charge stored in the capacitor 2.00 s after the switch is closed?
a. 401 ?C b. 18.8 ?C c. 108 ?C d. 450 ?C
During a severe thunderstorm, it is advisable to
a. seek shelter under a tree. b. do laundry or watch TV. c. call someone on the phone. d. do none of these things.