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A bat flying toward an obstacle at 9 m/s emits brief, high-frequency sound pulses at a repetition frequency of 83 Hz. What is the time interval between the echo pulses heard by the bat? in milliseconds
A sled and rider with a combined weight of 67 kg are at rest on the top of a hill 26 m high. What is their total energy at the top of the hill
In certain ranges of a piano keyboard, more than one string is tuned to the same note to provide extra loudness. what beat frequency is heard when the hammer strikes the two strings simultaneously
A 4.55 mol sample of a diatomic ideal gas (? = 1.4) expands slowly and adiabatically from a pressure of 4.10 atm and a volume of 11.5 L to a final volume of 30.0 L. What is the initial temperature of the gas
question a bowling ball is released from rest and and rolls without slipping down an inclined plane at 18deg to the
The distance to a point source is increased by a factor of 7. By what factor does the intensity increase
When in orbit, a communication satellite attracts the earthwith a force of 19.0 kN, Find the satellite's altitude above the earth's surface
A spaceship is launched from the surface of the earth at aninitial speed of 2.00x104m/s. What is the space ships speed
An ambulance moving at 37 m/s sounds its siren whose frequency is 500 Hz. What frequency does a person in the car hear as the ambulance approaches the car
Draw a sketched graph of the X Ray spectrum generated by a 100kV tube Voltage using a Tungsten target. Using your sketch describe what changes you would expect to see with regards to the produced spectrum
A block of mass 2.90 kilogram is pushed 2.60 meter along a frictionless horizontal table by a constant 16.0 Newton force directed 27.0 degree below the horizontal. Find the work done on the block by the applied force
A 4.8-kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket
When a missile is shot from one spaceship towards another, it leaves the first at 0.920c and approaches the other at 0.650c. Find the relative velocity of the two ships
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