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In order to shorten the distance required for landing, a jet airplane is equipped with moveable vanes which partially reverse the direction of the air discharged by each of its engines. Each engine scoops in the air at a rate of 120 kg/s and discharges it with a velocity of 600 m/s relative to the engine. At an instant when the speed of the airplane is 270 km/h, determine the reverse thrust provided by each of theengines.
In a discussion person A is talking 2.0 dB louder than person B, and person C is talking 3.3 dB louder than person A. What is the ratio of the sound intensity of person C to the sound intensity of person B
The elementary particle called a muon is unstable and decays after 2.20 ?s, as observed in its rest frame, What lifetime do you observe for the muon
A proton (1e) and an alpha particle charge = 2e, mass = 6.64 x10^-27 kg are initially at rest, separated by 4.00 x 10^-15 m. Find the speeds of the proton and alpha particle
A gratign spectrometer while in a vaccum on Earth sends 500nm light off at angle 20.0 degrees in first order spectrum, find the index of refration of the mongoian atmosphere
How much force is needed to increases the velocity of a 5000kg truck from 40 km/h to 70 km/h in 20 s on the horizontal road, What is the change of the total mechanical energy
An Olympic skier moving at 20m/s down a 30o slope encounters a region of wet snow and slides 145 m before coming to a stop. What is the coefficient of friction between skis and snow if the combined mass of the skier and skis is 55 Kgm.
Graphically determine the resultant of the following three vector displacements: (a) 34m, 25 degrees north of east ;(b) 48m, 33 degrees east of north; and (c) 22m, 56 degrees west of south.
A mass of 6.70 kg is suspended from a 1.15 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
An electron moves with a speed of 5.0 x 104 m/s perpendicular to a uniform magnetic field of 0.20T. What is the magnitude of magnetic force on the electron
a gas bubble from an explosion under water oscillates with a period tpadbec. where p is the static pressure d is the
A 69-kg sky diver jumped out of an airplane at an altitude of 0.70 km. How much energy was dissipated by air resistance during the jump
You work in a materials testing lab and your boss tells you to increase the temperature of a sample by 36.8oC. what is its temperature in degrees Fahrenheit
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