Two isotopes have the same __________ number
Fill in the blank(s) with correct word
atomic
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While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60-kg person runs with a power of 70 watts during a race, how fast is the person running? Assume a running step is 1.5 m long.
What will be an ideal response?
At a particular instant, a proton moves toward the east in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it is
A) downward. B) upward. C) zero. D) toward the north. E) toward the south.
A 92.5 kg stunt man stands on a piston that will launch him out of a vertical tube. The piston applies a constant force F to the man’s feet. Starting from rest, the force is applied as the man moves vertically 3.25 m, and while the piston is pushing, the man attains a velocity of 25.5 m/s. What was the man’s apparent weight during this time interval?
A. 9.3 kN B. 18.5 kN C. 19.4 kN D. 10.2 kN
Faraday's law was extended by Maxwell toward
A) changes in electric fields. B) changes in magnetic fields. C) both of these D) neither of these