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Air flows from a reservoir through a nozzle into a receiver. The reservoir is maintained at 400 kPa absolute and 20-C. The nozzle has a 10-cm-diameter throat and a 20-cm-diameter exit. Determine the receiver pressure needed to locate a shock wave at the exit. For that pressure, calculate the mass flux and the velocity just before the shock.
Two 50.0 N weights are suspended at opposite ends of a rope that passes over a light, frictionless pulley, find the tension in the rope and chain
The power radiated by an object is 145 W. If the object were a perfect blackbody radiator (and otherwise was the same) it would radiate 587 W. What is the emissivity of the object
The temperature of the skin is approximately 35 degrees celsius. At what wavelength does the radiation emitted from the skin reach its peak?
Antarctica is roughly semicircular in shape with a radius of2000km. The average thickness of the ice cover is 3000m. How many cubic centimeters of ice does Antarctica contain
Jupiter has a radius of 71,492km and a mass of 1.9x10^27 kg. Jupiter's moon has a mass of 9x10^22kg and orbits at a distance of 422x10^3km
A carbon resistor is made of a cylinder of carbon, of diameter 7.4 mm. what is the length of the cylinder
An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 84 keV. Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. the answer is in seconds
A certain organ pipe, open at both ends, produces a fundamental frequency of 296 Hertz in air. find what fundamental frequency will it produce
A merry-go-round is stationary. A dog is running on the ground just outside its circumference, moving with a constant angular speed of 0.775 rad/s. At what time will the dog reach the bone
A 255 g oscillator has a speed of 93.0 cm/s when its displacement is 3.90 cm and 74.5 cm/s when its displacement is 6.00 cm
A sled and its rider are moving at a speed of 4.0 m/s along a horizontal stretch of snow. The snow exerts a kinetic frictional force on the run ner of the sled, what is the displacement of the sled
A LASIK vision correction system uses a laser that emits 10 -long pulses of light, each with 2.5 of energy. The laser is focused to a 0.90 -diameter circle. What is the average power of each laser pulse
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