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An automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. Calculate:
a) Its angular acceleration, assumed constant.b) the total number of revolutions the engine makes in this time
A lead bullet with a mass of 0.02 kg traveling at 209 m/s strikes an armor plate and comes to a stop. what is the temperature change
The electric motor in a toy train requires a voltage of 3.1V .Find the ratio of turns on the primary coil to turns on the secondary coil in a transformer that will step the 110V household voltage down to 3.1V .
An empty capacitor is connected to a 11.9-V battery and charged up. The capacitor is then disconnected from the battery, and a slab of dielectric material (κ = 2.2) is inserted between the plates. Find the magnitude of the amount by which the potenti..
The length of a simple pendulum is 0.75 m and the mass of the particle (the "bob") at the end of the cable is0.40 kg. What is the angular frequency of the motion
How much thermal power is radiated by a light bulb when its filament is heated to 200k? Assume that the filament is a blackbody of area 1.0 cm2, At what wavelength is the radiation peaked
A rocket that is in deep space and initially at rest relative to an inertial reference frame has a mass of 2.80 105 kg, of which 1.92 105 kg is fuel. What is the rocket's thrust
A man slides along a long water slide and then being launched into the air to land in a water pool. Find the magnitude of the velocity at launch
A rope and two masses are suspended from the ceiling of an elevator which is accelerating downward at 2.8 m/s^2. find the tension in the rope connecting the two masses
A pipe is horizontal and carries oil that has a viscosity of 0.15 Pa · s. The volume flow rate of the oil is 5.8 10-5 m3/s. What is the absolute pressure at the input end
What is the little distance between the speakers for which the interference of the sound waves is destructive.
A step-down transformer is used for recharging the batteries of portable devices. determine the rms output voltage of the transformer
A proton and electron moving with the same speed enter the magnetic field of the earth at the same angle, what type of trajectory will each particle follow in the earth's magnetic field
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