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In a test laboratory, an electric engine is used to accelerate a wheel from rest. The center-of-mass of the wheel remains stationary at all times. The wheel's angular acceleration is in the counter-clockwise direction. It rotates through an angular distance ??, achieves a final angular speed ? and has a constant moment of inertia I. If you assume constant angular acceleration and ignore friction and air resistance, what is the average power output of the engine, expressed in terms of ??, ? and/or I?
Two waves of the same frequency have amplitudes 1.31 and 2.94. What is the resultant amplitude
determine the distance between the centers of the two plates.
A circuit is powered by a 12.0 V battery in series with R1=25 ohms A second set of resistors R2= 75 ohms, What is the voltage drop across the 75 ohm resistor
A loudspeaker of mass 24.0 {rm kg} is suspended a distance of h = 1.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.70 {rm m}.
A cardinal (Richmondena cardinalis) of mass 4×10-2 kg and a baseball of mass 0.143 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p_c of momentum to the magnitude p_b of the baseball's momentum.
A snowmobile climbs a hill at velocity v-up. The slope of the hill is a 2 ft rise for every 70 ft of distance. The resistive force of the snow is equal to 4.12 percent of the weight of the snowmobile. How fast will the snowmobile move downhill, assum..
You have a pure (24-karat) gold ring with mass 17.0 g, how many protons are in the ring and what is their total positve charge
What is the minimum uncertainty in position, in nm, of an electron whose velocity is known to be between 2.30×105m/s
For the third circuit, consisting of a single battery and two light bulbs in parallel, What is the current through each bulb
A hair dryer operate at 1800 watts along with a 240 watt power resistor connected in a series. Utilizing a 120 volt source, determine the current I and resistance R of the hair dryer
A uniform cylindrical turntable of radius 1.80 m and mass 25.2 kg rotates counterclockwise in a horizontal plane with an initial angular speed of 4pi rad/s. Find the final angular speed of the clay and turntable
The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. Evaluate how far does he slide?
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