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A standing observer perceives a train whistle to have a frequency of 300 Hertz. If the train is moving towards the observer at a velocity of 25 meter per second, obtain the frequency of sound waves emitted from the train? Suppose the speed of sound is 300 m/s.
A laser beam strikes one end of a slab of material, Determine the number of internal reflections of the beam before it emerges from the opposite end of the slab
A baseball is bunted down the third-base line leaving the bat from a height of 0.850m with an initial velocity of 4.00m/s at an angle of 36.87° above horizontal, what is the baseball's tangential acceleration at maximum height
A 300 gram block is attached to a light horizontal spring. The block is free to slide on a horizontal table. Find how far beyond its equilibrium position will the spring stretch at its first maximum extension if the surface of the table is frictionl..
Jim's dog Sparky runs 55.0m northeast to a tree, then 70.0mwest to a second tree, and finally 20.0m south to a third tree
A 1400 wrecking ball hangs from a 20 -long cable. The ball is pulled back until the cable makes an angle of 30.0 with the vertical. By how much has the gravitational potential energy of the ball changed?
An AC generator with a frequency of 105Hz and an rms voltage of 22.5 V is connected in series with a 10.0 K ohm resistor and a 0.25 micro Farad capacitor
A 3kg model rocket initially at rest experiences an average force of 3950N over a distance of 200 cm. How much has the rockets kinetic energy increased
A block is dropped onto a spring with k = 31 N/m. The block has a speed of 3.5 meter per second just before it strikes the spring. evaluate what is the mass of the block
a place a charge of -8.60 microc at point p and find the magnitude and direction of the electric field at the location
Two blocks are connected by a string. The smooth inclined surface makes an angle of 39o with the horizontal, Find the magnitude of the hanging block acceleration
A box of mass 32.0 kg is sitting on a ramp which makes an angle of 24.0 degrees with respect to the horizontal. Find the magnitude of the acceleration of the box on the ramp
in the rectangle in the drawing a charge is to be placed at the empty corner to make the net force on the charge at
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