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A race car is driven at a constant velocity of 200 km/h on a straight, level track. The power delivered to the wheels is 150 kW. Compute the total resistive force on the car?
A 3.00-cm-diameter parallel-plate capacitor with a spacing of 0.200mm is charged to 300V. What is the total energy stored in the electric field
a train consists of 50 cars each of which has a mass of 7.2times 103kg. the train has an acceleration of7.9 times
A merry-g-round (I=1/2MR^2) of mas 250kg and radius 3m has been spun so that is has an angular velocity of 15 rad/s. what is the final angular velocity of the merry-go-round
An air conditioner is used to keep the interior of a house at a temperature of 25C while the outside temperature is 34C, what is the mechanical power required to keep the house cool?
A space probe which is a distance of 1.6×1010 m from a star measures the total intensity of electromagnetic radiation from the star to be 5700 W/m^2. what is its total average power output
At what angle to the surface must a diver submerged in a lake look toward surface to see the setting Sun just all along the horizon.
Assume a typical hummingbird has a lifespan of 4.0 years and an average heart rate of 1300 beats per minute. (a) Calculate the number of times a hummingbird's heart beats in its life, and express it in scientific notation.
a man strikes one end of a thin rod with a hammer. the speed of sound in the rod is 16 times the speed of sound in air.
Light of wavelength 587.5 nm illuminates a slit of width 0.75 mm. Calculate the width of the central maximum
two stretched cables both experience the same stress. the first cable has a radius of 3.1x10-3 m and is subject to a
A certain medical machine emits x-rays with a minimum wavelength of 0.025 nm. One day, the machine has an electrical problem and the voltage applied to the x-ray tube decreases to 80 percent of its normal value. Now what is the minimum x-ray wavel..
Having trouble figuring out the total time it takes for something following the path of a brachistochrone. Starting at some point along and falling due to gravity to the lowest point. Equation I have is (a^.5/g^.5)*(1-cos(t))^.5/(cos(t_o)-cos(t))^.5 ..
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