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Could a Lorentz engine (like the ones that move the write head inside of hardrives) be used to run car ? Would it be possable to get it producing 60hp, and a decent amount of tourque, if so how large would it have to be / what would its power consumption be ?
An ideal gas, Cp = (7/2)R, is heated in a steady-flow heat exchanger from 70°C to 190°C by another stream of the same ideal gas which enters at 320°C. The flow rates of the two streams are the same, and heat losses from the exchanger are negligibl..
a turntable must spin at 33.6 rpm 3.52 rads to play an old-fashioned vinyl record. how much torque must the motor
a particle undergoes two displacements. the first has a magnitude of 128 cm and makes an angle of 113 degrees with the
Suppose that you are traveling on board a spacecraft that is moving with respect to the earth at a speed of 0.970c. compute your breathing rate
A rod is being used as a lever, as shown in the figure below. The fulcrum is x1 = 1.79 m from the load and x2 = 3.81 m from the applied force. If the load has a mass of 12.8 kg, what force must be applied to lift the load?
A color television needs to be plugged into a 120-volt circuit. It uses 2.5 amperes. What is the television's wattage? Select one: a. 48 amps b. 48 watts c. 300 volts d. 300 watts What is the power of an appliance that is operating at a current of 2 ..
A bullet with mass m and speed v is fired at a ballistic pendulum bob of mass M. The bob is attached to a thin, light rod of length L, hangs vertically initially, and is attached to a pivot at its top end.
A satellite moves in a circular earth orbit that has a radius of 8.38 x 106 m. A model airplane is flying on a 22.8-m guideline in a horizontal circle. The guideline is nearly parallel to the ground. Find the speed of the plane such that the plane an..
A person 25 centimeters in front of a concave makeup mirror sees an upright image magnified by a factor of two. Draw a sketch to locate the image of the person
A ball of clay weighing 0.5 kg is thrown at a pendulum bob at rest weighing 4-kg. What is the velocity of the pendulum bob
An electron and a proton are each accelerated starting from rest through a potential difference of 30.0 million volts. Find the momentum (in MeV/c) and the kinetic energy (in MeV) of each, and compare with the results of using the classical formul..
A 12-kg block initially slides at 18 m/s on a flat rough surface and eventually stops. what is the entropy change of the system
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