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An automobile of mass 1420 kilogram traveling at 20 m/s is at the foot of a hill that rises 120 meter in 2 kilometer. At the top of the hill, the speed of the automobile is 10 m/s. Obtain the average power delivered by the automobile engine, ignore any frictional losses.
Within a certain material, an EM wave with lamda=1um is attenuated to 10% of its originality intensity after propagating 10cm. Determine the imaginary part of the index of refraction ni.
two people running a 5000 meter race. cindy is running at 2.8meterssecond. jim starts 3000s late but is running at 4.2
The coefficient of static friction between a rope and the table on which it rests is us (mew sub s). Find the fraction of the rope that can hang over the edge of the gable before it begins to slip
A tire with an inner volume of 0.0250 m is filled with air at a gauge pressure of 36.0 psi (i.e. lb/in2). If the tire valve is opened to the atmosphere, what volume outside of the tire does the escaping air occupy?
A turntable 1.90 in diameter rotates at 76.0 . Two speakers, each giving off sound of wavelength 31.1 , are attached to the rim of the table at opposite ends of a diameter. What is the greatest beat frequency the listener will receive from this sys..
A baseball approaches home plate at a speed of 41.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 50.0 m/s straight up. The ball has a mass of 145 g and is..
You heat a 545 cm^3 sample of a substance from 121 celcius to 285 celcius and find that its volume increases by 2.29 cm^3. obtain the coefficient of volume expansion of this substance
Suppose 23.8 L of an ideal monatomic gas at a pressure of 2.60 105 kPa is expanded adiabatically (no heat transfer) until the volume is tripled. What is the pressure of the gas at the new volume
an object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed.
Raindrops fall 1500 m from a cloud to the ground. If they were not slowed by air resistance, how fast would the drops be moving
A 0.540-kg object attached to a spring with a force constant of 8.00 N/m vibrates in simple harmonic motion with an amplitude of 11.2 cm. Calculate the maximum value of its speed
The coefficient of linear expansion of a certain solid is 11 × 10^-6/C°. Assuming this solid behaves like most solids, what is its coefficient of volume expansion
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