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Two automobiles are equipped with the same single frequency horn. When one is at rest and the other is moving toward the first at 15 m/s the driver at rest hears a beat frequency of 5.5 Hz. What is the frequency the horns emit?
(Hz)
Use the force or spring constant from part (a), compute the potential energy stored in the spring when the spring is displaced 2.40 cm
A spinning flywheel has rotational inertia I = 417 kg·m2. Its angular velocity decreases from 19.5 rad/s to zero in 320 s due to friction. What is the frictional torque acting? Take positive to be "with the flywheel's rotation", and negative to be "o..
A 55 kg person riding a bike puts all her weight on each pedal when climbing on a hill. How could she exert more torque
A well insulated rigid vessel also contains 3 kg of saturated liquid water at 40 oC. The vessel also contains an electrical resistor that draws 10 amperes when 50 volts are applied.
A team of tornado-chasing meteorology graduate students is out in search of tornados. They drive directly toward a tornado warning siren at 25.5 m/s
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
A closed box has two metal terminals a and b. The inside of the box contains an unknown emf emf in series with a resistance R, Find the emf and R
Two people carry a heavy electric motor by placing it on a light board 2.90m long. One person lifts at one end with a force of 370N, What is the weight of the motor
A rotating cylinder about 16- {rm km} long and 6.8 -km in diameter is designed to be used as a space colony. With what angular speed must it rotate so that the residents on it would experience the similar acceleration because of gravity as on Eart..
A block of mass 20m can move without friction on a horizontal table. find the magnitude of the acceleration of the descending block
q1. two bicycle tires are set rolling with the equivalent initial speed of 5.0 ms along a long straight road and
Gas in a cylinder similar to the one shown in the figure moves a piston with area 0.223 m2 as energy is slowly added to the system. find the displacement of the piston
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