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Consider an aircraft powered by a turbojet engine that has a pressure ratio of 12. The aircraft is stationary on the ground, held in position by its brakes. The ambient air is at 27 C and 95 kPa and enters the engine at a rate of 10 kg/s. The jet fuel has a heating value of 42,700 kJ/kg, and it is burned completely at a rate of 0.2 kg/s. Neglecting the effect of the diffuser and disregarding the slight increase in mass at the engine exit as well as the inefficiencies of engine components, determine the force that must be applied on the brakes to hold the plane stationary.
What is the wavelength of the second laser that would place its second maximum at the same location as the fourth minimum of the first laser, if = 0.300 ?
Two runners of mass 70 kg and 60 kg,respectively, have a total linear momentum of 350 kg*m/s. The heavier runner is running at 2.0m/s. Examine the possible velocitis of the lighter runner.
A long string of tension T and mass density η is attached to a small sphere of mass m. What is the displacement of the string on the right side of the mass
What is the magnitude of the dipole moment and find an expression for the electric field Eat the center of the semicircle. Give your answer in component form.
A 0.360 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball.
A singly charged ion of 7Li (an isotope of lithium) has a mass of 1.16×10?26kg, What is the radius of the ion's path in the magnetic field
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1040 Hz, What is the speed of the bird, expressed as a percentage of the speed of sound
A supertanker filled with oil has a total mass of 11.7·108 kg. If the dimensions of the ship are those of a rectangular box 209 m long, 81.7 m wide
A hydrogen atom in its ground state absorbs a photon with an energy of 26 eV, What is the kinetic energy of the ejected electron
Two identical piano wires have a fundamental frequency of 491 Hz when kept under the same tension. when both wires oscillate simultaneously
A converging lens of focal length 18 cm is 30 cm to the left of a diverging lens of focal length - 6 cm. a coin is placed 12 cm to the left of the converging lens. Find (a) location and (b) magnification of the coin's final image.
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