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Problem:
Explain critical speed of a rotating shaft?
Additional information: This problem related to critical speed of a rotating shaft in physics.
displacement vector points due east and has a magnitude of 1.36 km. displacement vector points due north and has a
A turntable must spin at 33.4 rpm (3.50 rad/s) to play an old-fashioned vinyl record. Determine how much torque must the motor deliver if the turntable is to reach its final angular speed in 1.0 revolution
A radiator has an emissivity of .90 and its exposed area is 1.23 m^2. the temperature of the radiator is 100 degrees C, what is the heat flow rate from the radiator
A passenger on a moving train walks at a speed of 1.60 m/s due north relative to the train. What are the magnitude and direction of the velocity of the train relative to the ground
In figure, a ball is thrown up onto a roof, landing some timelater at height h = 20.0 m above and d = 30.0 mhorizontally from the release point. The ball's path just beforelanding is angled at θ = 60.0o with the horizontal roof. (a)Find the time o..
The figure shows a circuit of four resistors that are connected toa larger circuit. The graph below the circuit shows the electricpotential V(x) as a function of position x alongthe lower branch of the circuit, through resistor 4; the potentialVA ..
A 0.840-kg block oscillates on the end of a spring whose spring constant is k= 42.0 N/m . The mass moves in a fluid which offers a resistive force F=-bv, where b = 0.640 N*s/m. What is the fractional decrease in amplitude per cycle?
q1. a block of mass 2.7 kg being released from rest on a 1m frictionless plane inclined at an angle of 40 degree. the
An ideal gas has a pressure of 1.0 atm, a volume of 25.0 L at a temperature of 30 deg C. How many molecules are there in the gas
show that the horizontal distance that the aircraft engine falls is 8400 m. If the airplane somehow continues to fly as if nothing had happened. where is the engine relative to the airplane at the moment the engine hits the ground?
Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 63.3 N, Jill pulls with 76.1 N in the northeast direction, and Jane pulls to the southeast with 137 N. Find the magnitude of the net force the people exert
A rightward force of 15 N is applied 35 degrees above the horizontal to a 6 kg box to move it across a rough surface. Calculate the acceleration of the object
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