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At the Winter Olympics, an athlete rides her luge down the track while a bell just above the wall of the chute rings continuously. When her sled approaches and passes the bell, she hears the frequency of the bell fall by the musical interval called a minor third. That is, the frequency she hears drops to five sixths of its original value.
(a) Find the speed of sound in air at the ambient temperature of -10.0?C.
(b) Find the speed of the athlete.
A farm tractor tows a 3550-kg trailer up a 18?incline with a steady speed of 3.0 m/s. What force does the tractor exert on the trailer
What is the efficiency of a cyclical heat engine in which 65.0 kJ of heat transfer occurs to the environment for every 95.0 kJ of heat transfer into the engine
What magnitude point charge creates a 14000 N/C electric field at a distance of 0.230 m, How large is the field at 20.0 m
A 10-kg box is stationary on the ground and pushed by a downward force of 30 N. Calculate the supporting normal force acted on the box from the ground
Two metal balls are hung from strings. The first ball, 0.14 kg, is pulled to the side and released, What is the mass of the second ball
The specific heat capacity of the material use to make the block is C resolve the temperature rise that results from the collision in terms of C and the other given quantities.( suppose that no energy is transferred to the track or the surrounding..
A spring with spring constant 34N/m is attached to the ceiling, and a 4.6-cm-diameter, 1.4kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
Blocks of mass 20, 80, and 240 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. What is the magnitude of the force that the left block exerts on the middle one
a plucked guitar string produces a sound wave of frequency 0.44 kHz on a day when the speed of sound is 340m/s. What is the wavelength of the sound wave
A 23 m long copper wire,2.00 mm in diameter including insulation, is tightly wrapped in a single layer with adjacent coils touching, to form a solenoid of diameter 2.5 cm, What is the length of the solenoid
Two charged spheres are 19 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
When resistors 1 and 2 are connected in series, the equivalent resistance is 21.4 ?. When they are connected in parallel, the equivalent resistance is 4.08
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