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Three resistors, 25, 45, and 75 Ohms, are connected in series, and a 0.51-A current passes through them. What is (a) the equivalent resistance and (b) the potential difference across the three resistors?
the angular velocity of a runners thigh changes from 3 rads to 2.7 rads during a 0.5 s time period. what has been the
Studies have shown that some people can detect 577 nm light with as few as 100 photons enteringthe eye per second. What is the power delivered by such a beam of light
A diver springs upward from a three-meter board. At the instant shecontacts the water her speed is 8.90m/s and her body makes an angleof 75.0o with respect to the surface of the water. How much time does she spend in the air
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.5 °C. What should be the minimum temperature of the hot heat reservoir
A computer hard drive typically operates with a rotation speed of 7200 rpm (revolutions per minute).What is the angular acceleration of the drive
you are handed an apple that has a mass of 102g. to get a better of idea of what different pressure feel like, what is the pressure of the apple
A tennis player standing 10.2 m from the net hits the ball at 3.60° above the horizontal. To clear the net, the ball must rise at least 0.322 m. how fast was the ball moving when it left the racquet
An object has a total energy of 5.0x10^15 J and a kinetic energy of 2.0x 10^15 J. What is the magnitude of the objects relativistic momentum
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise
the propeller of an toy airplace is at rest when the controller starts the engine. two seconds later the propeller is
A plastic bag is filled with nitrogen at atmospheric pressure and 27.0 oC. If hot air is used instead of nitrogen, what is the required volume of the balloon if the air inside can be maintained at 39.0 oC
A proton moves through a magnetic field at 36.9% of the speed of light. At a location where the field has a magnitude of 0.00629 T and the proton\'s velocity makes an angle of 141° with the field, what is the magnitude of the magnetic force acting on..
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