The power rating of a 400-? resistor is 0.800 W. (a) What is the maximum voltage that can be applied across this resistor without damaging it? (b) What is the maximum current this resistor can draw without damaging it?
What will be an ideal response?
Answer: (a) 17.9 V (b) 44.7 mA
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The rule stating that the sum of two emitted frequencies in an atomic spectrum equals a third frequency is consistent with
A) momentum conservation. B) energy conservation. C) Planck's constant. D) none of the above
An Earth satellite is in circular orbit 230 km above the surface of the Earth. It is observed to have a period of 89 min. From this information, estimate the mass of the Earth
What will be an ideal response?
Who was the discoverer of radioactivity?
A. Neils Bohr B. Marie Curie C. Albert Einstein D. Henri Becquerel E. Richard Feynman
A block of mass m is resting on a ramp making an angle ? with respect to the horizontal. The coefficient of static friction and the coefficient of kinetic friction for this surface are ms and mk, respectively. If the block does not slide, then the frictional force holding the block must be