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 __________
Fill in the blank(s) with correct word
1,200 W
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Two very long parallel wires are a distance d apart and carry equal currents in opposite directions. The locations where the net magnetic field due to these currents is equal to zero are
A) midway between the wires. B) a distance d/2 to the left of the left wire and also a distance d/2 to the right of the right wire. C) a distance d to the left of the left wire and also a distance d to the right of the right wire. D) a distance d/ to the left of the left wire and also a distance d/ to the right of the right wire. E) The net field is not zero anywhere.
A coil of 57. turns of wire has a diameter of 9.5 cm and carries 7.2 Amperes
(a) How large is the magnetic field, in Tesla, at the center of the loop? (b) How many Gauss is that? (c) If the same length of wire made a coil with twice the original diameter, how large is the magnetic field now?
The phenomenon easily explained only in terms of the particle model of light is
A) reflection. B) refraction. C) photoelectric effect. D) diffraction. E) none of the above
Einstein rejected the classical idea that space and time are
A) two parts of a whole. B) connected to each other. C) independent of each other.