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The lifting force exerted on an airplane wing varies jointly as the area of the surface and the square of the planes velocity. The lift for a wing of area 120 sq.ft. is 2025 lb when the plane is going 90 miles per hour. Obtain the lift if the speed is decreased to 80 mph.
Mike pulls a sled across level snow with force of 235 N along a rope that is 35.5° above the horizontal. If the sled moved the distance of 75.0 m, how much work did Mike do.
The ball rolls off the edge and falls a vertical distance of 2.00 m before hitting the floor. Illustrate what is the angular displacement of the ball while the ball is in the air?
At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, How does the intensity level change
Light enters a 10 cm thick, parallel face, glass block at normal line drawn through the block. The angle of incidence for the light is 30 degrees. What is the index of refraction of the prism
A car proceeding due south at 60 km/h (V1) makes a right turn,after which it is traveling due west at 80 km/h (V2). What is its change in velocity (V2-V1)? and draw it
question why is the spectrum from a black body source continuous while a spectrum for a gas discharge source of the
Two canoeists in identical canoes exert the same effortpaddling and hence maintain the same speed relative to the water. What is the speed of the water relative to shore
The turbines in a hydroelectric plant are fed by water falling from a 50-m height, what is the mass flowrate of water required to power a 200-watt light bulb
A light beam having a wavelength of 470. nm in air is directed into glycerine (n = 1.47). What is the frequency of the light in the glycerine
Two stones are launched from the top of a tall building. One stoneis thrown in a direction 30.0^\circ above the horizontal with aspeed of 16.0 \rm {m/s}; Which stone lands farther away from the building
A fountain with an opening of radius 0.015m shoots a stream ofwater vertically from ground level at 6.0m/s. The density of wateris 1000kg/m3. calculate the volume rate of flow of water
the collision between a hammer and a nail can be considered to be approximately elastic. estimate the kinetic energy
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