The magnet moving past an object will produce eddy currents in the object if the object:
a. is magnetic material only.
b. is a conductor.
c. is an insulator.
d. is a liquid.
b
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All neutrinos are left handed
Indicate whether the statement is true or false
A 1.2-kg mass is projected from ground level with a velocity of 30 m/s at some unknown angle above the horizontal. A short time after being projected, the mass barely clears a 16-m tall fence. Disregard air resistance and assume the ground is level. What is the kinetic energy of the mass as it clears the fence?
a. 0.35 kJ b. 0.73 kJ c. 0.40 kJ d. 0.68 kJ e. 0.19 kJ
Diffraction, optical quality, and atmospheric conditions all contribute to the limitations of what power of a telescope?
a. resolving power b. magnifying power c. diffraction power d. light gathering power e. focusing power
A track star in the broad jump goes into the jump at 10 m/s and launches himself at 20° above the horizontal. How long is he in the air before returning to Earth? Note: g = 9.8 m/s2
a. 0.35 s c. 0.70 s b. 0.42 s d. 0.89 s