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From a vantage point very close to the track at a stock car race, you hear the sound emitted with a moving car. You detect a frequency that is 0.908 times as small as the frequency emitted with the car when it is stationary. The speed of sound is 343 m/s. What is the speed of the car?
80 cm3 of water takes 12 min to cool from 40?C to 15?C in a draft; it is contained in a copper calorimeter of mass 150 g, Calculate the specific heat of the suspension in SI units
A nuclear power plant has a maximum steam temperature (Th) of 310 degrees Celsius. It produces 460 MW of electric power in the winter, Find its maximum winter efficiency
A molecule of a mass m and velocity v strikes a wall and is reflected maintaing the same speed. What is the magnitude of the impulse imparted by the wall to the molecule
Calculate the magnetic force per meter between two such lightning bolts separated by 10 meters. (This is mainly to give a feeling for the strength of the magnetic field)
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. What is her average speed for the round trip
An ancient bone contains 55.5% as much Carbon 14 as a piece of living matter with an equal carbon content. How old is the bone
A solid cylinder of radius 0.35 m is released from rest from a height of 1.8 m & rolls down the incline as shown. Find the angular speed of the cylinder when it reaches the horizontal surface?
A system does 112 J of work on its environment and gains 72 J of heat in the process. What is the change in the internal energy of the environment
Starting from rest with an acceleration of 0.37 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. Illustrate what is the speed at which the belt of the ramp is moving?
An electron in an atom has an orbital angular momentum with ml = 0. What is the component morb,z? (J*s) What is the component ?orb,z? (J/T) If an atom is in an external magnetic field B of magnitude 45 mT and directed along the z-axis, what is the..
a fugitive tries to hop on a freight train traveling at a constant speed of 5.0 ms. just as an empty box car passes him
Football players measure their acceleration by seeing how fast they can sprint 40 yards (37 ). what is the average power output for this sprint
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