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A truck traveling east at 21 m/s sounds a 1200 Hz horn. Find the wavelength of the sound heard by a stationary listener placed east of the truck? (The speed of sound is 340 m/s)
If you move at 11 m/s toward a 2300 Hertz source that is moving toward you with a ground speed of 36 m/s, compute what frequency do you hear?(The speed of sound is 340 m/s)
a block is made of an unknown material. when placed in water the block floats and 4 m3 of the block is observed to be
Three liquids are at temperatures of 5.0°C, 21°C, and 33°C, respectively. Equal masses of the first two liquids are mixed, Find the equilibrium temperature when equal masses of the first and third are mixed
a disk of mass m and radius r starts form rest at the top of a 30 degree incline with a height of 2m. if the disk rolls
a boy is laying on a sled wich is on an ice covered hillinclined at an anlge of 15 degrees if the boy and the sled have acombned mass of 54kg what is the force pulling them down the hill
A 2Kg wood block is attached to a .3 g bucket by a massless string rests on the durface of and inclined plan of 20 degrees. the coefficient of friction between the block and the inclined plane are static friction is equal to .4 and kinetic friction o..
An excavation crew digs a hole in the ground measuring 60 yd x 50yd x 8 yd to facilitate a basement for an office building. Five dump trucks, each with a capacity of 20 yd3, are utilized to haul the material away. How many trips should each truck mak..
if a test charge is positioned near a charged body does the charge itself exert a force directly acting on the test
A negative charge of -6.0 10-6 C exerts an attractive force of 64 N on a second charge 0.044 m away. What is the magnitude of the second charge
What is the internal resistance of an automobile battery that has an emf of 12.0 V and a terminal voltage of 16.5 V while a current of 7.50 A is charging it
A particle has a de Broglie wavelength of 2.7x10-10 m. Then its kinetic energy doubles. What is the particle's new de Broglie wavelength, assuming that relativistic effects can be ignored
Two identical loudspeakers are placed on a wall 3.00 m apart. A listener stands 5.00 m from the wall directly in front of one of the speakers. A single oscillator is driving the speakers at a frequency of 300 Hz.
A meter stick travels past an observer at the speed of 0.9c. What length would be recorded by the observer
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