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Find the power factor for an RC circuit connected to a 70.0Hz generator with an rms voltage of 155 V. The values of R and C in this circuit are 115%u03A9 and 79.4%u03BCF, respectively.
a distant quasar is found to be moving away from the earth at 0.8 c. a galaxy closer to the earth, What is the recessional speed of the quasar
RLC alternating current circuit with a 25 ohm resistor, What is the average power when operating at twice the resonant frequency
A doubly charged helium atom whose mass is 6.6 10-27 kg is accelerated by a voltage of 2500 V. What is its period of revolution
A block of mass m = 331 g is dragged with a string across a rough horizontal table. The string tension is T = 3.27 N, What is the power supplied by the force of friction
Light from a heliom-neon laser (wavelength 632.8 nm) diffracts when incident on a hair of thickness 0.040 mm. What is the angular width of the central diffraction maximum
a contestant in a winter games event pushes a 31 kg block of ice across a frozen lake. the coefficient of static friction is 0.1, Calculate minimum Force he must exert to get moving back
To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. What was the raven's speed right after the collision
A 245 ball is tied to a string. It is pulled to an angle of 5.20 and released to swing as a pendulum. A student with a stopwatch finds that 10 oscillations take 10.5.
A typical coal-fired plant generates 1000 MegaWatts of usable power at an overall thermal efficiency of 35%, What is the rate of heat input to the plant
a 1000kg car experiences a total power of 150hp (horsepower) if it starts from rest what is the magnitude of the velocity of the car in miles per hour 10s later
Gillian buys a pendulum clock at a discount store and discovers when she gets it home that it loses minutes each day.
A 40.0g ball of clay traveling east at 3.00m/s collides, What is the speed of the resulting ball of clay
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