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If two successive overtones of a vibrating string are 280 Hzand 350 Hz, what is the frequency of the fundamental?
A 2000-kg horizontal beam is supported at each end. A 160-kg load rests a quarter of the way from one end if the beam and 120 kg cargo is 1/3 from the other end. What is the vertical force on each of the supports.
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.60 cm. (a) What is the work done by the field on the electron? J (b) What is the change in..
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1330 Hz. What is the speed of the bird
A vertical cylinder closed from both ends is equipped with an easily moving piston dividing the volume in two parts, each containing 1 mole of air.In equilibrium at T=300K, the volume of the upper part is 4 times the volume in the lower part. At what..
The electric motor of a model train accelerates the train from rest to 0.820 m/s in 18.5 ms. The total mass of the train is 875 g. Find the average power delivered to the train during the acceleration
Illustrate what are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
An 18 kg sled starts up a 31 degree incline with a speed of 3.2 m/s. The coefficient of friction is 0.25. How far up the incline does the sled travel
A projectile is launched from the ground and sails across an open field. At launch, its total mechanical energy is 100 J. At its highest point, is its potential energy greater than, less than, or equal to 100 J? Explain, assuming that air resistance ..
A rectangular loop of wire that is 36 cm wide and 25 cm long lies in the x-y plane in a region where the magnetic field is B = 1.1 T and directed at an angle of 63° with the z axis
A coil of inductance 81 mH and unknown resistance and a 0.84 µF capacitor are connected in series with an alternating emf of frequency 875 Hz. what is the resistance of the coil
An air bubble has a volume of 1.50 cm3 when it is released by a submarine 100 m below the surface of a lake. What is the volume of the bubble when it reaches the surface
Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, What is the final angular speed of the astronauts
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