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An alert physics learner stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 464 Hertz when the train is approaching him and 452 Hertz when the train is receding from him. Using these frequencies, obtain the speed of the train.
_________m/s
A cart is placed on an inclined plane (a wooden board which is seton an angle) and attached to a pulley by a rope at the end of thewooden board. On the other side of the rope, hanging below theinclined plane is a weight.
A good example of rotational motion is a ceiling fan. Assume the fan is rotating at a constant angular velocity of 100 rpm. Find the angular velocity
A velocity selector has a magnetic field of magnitude 0.32 T perpendicular to an electric field of magnitude of 0.34 MV/m. What must be the speed of a particle for it to pass through undeflected
In a certain cyclotron a proton moves in a circle of radius0.800 m. The magnitude of the magneticfield is 1.10 T. What is the oscillator frequency
a particle of rest mass mo with kinetic energy 15moc2 makes a perfectly inelastic collision with an identical particle
The drawing shows a straight wire carrying a current I.Above the wire is a rectangular loop that contains a resistorR. If the current I is decreasing in time, whatis the direction of the induced current through the resistorR — left-to-right or rig..
A tungsten wire has a radius of 0.089 mm and is heated from 20.0 to 1362 oC, When 100 V is applied across the ends of the hot wire, a current of 1.8 A is produced
A carpenter carries his 8kg toolbox at constant speed up 2 flights of stairs, each 3m high, in one minute. How much work did the carpenter do in carrying the toolbox up 2 flights
A spaceship of length L moves with a speed 7c/12 with respect to the ground. A ball is thrown from the back of the ship to the front. The speed of the ball with respect to the ship is c/3. Apply the Lorentz transformations to find:
A parallel plate capacitor is made of two 5cm x 5cm square plates that are separated by .012mm. The plates are charged to plus and minus 9.8nC each. What is the energy stored in the capacitor
A hanging iron wire with diameter 0.15 cm is initially 2.4 m long. When a 184 kg mass is hung from it, Find the approximate value of the effective spring stiffness of the interatomic force
The surface between a 12kg block , the 16kg wedge and between 16 kg wedge and the horizontal plane are smoothe, What is the force F which must be exerted on the 16 kg block in order that the 12 kg block
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