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An airport has runways only 161 m long. A small plane must reach a ground speed of 40 m/s before it can become airborne. What average acceleration must the plane's engines provide if it is to take off safely from its airport?
A cylinder with a moveable piston holds 2.71 mol ofargon at a constant temperature of 307 K. Calculate the heat added to the gas
A cowboy at a dude ranch fills a horse trough that is 1.50m long, 65cm wide and 45cm deep. He uses a 2cm diameter hose from which water emerges at 1.50m/s.
It is desired to magnify reading materal by a factor of 2.5xwhen a book is placed 8.0 cm behind a lens. What is the power of the lens in diopters
A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. What is the index of refraction of the unknown liquid
a fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. the
A converging lens with two convex surfaces has a front surface with radius of curvature of 11.3 cm; What is the focal length of the lens
A fisherman accidentally steps off the edge of a 4.0 meter-high dock and falls into the lake below the dock. what is the fisherman's speed on entering the water
A dielectric-filled parallel-plate capacitor has plate area = 30.0cm^2 , plate separation = 5.00mm and dielectric constant = 5.00. The capacitor is connected to a battery that creates a constant voltage = 10V.
q1. an artificial satellite circling the earth completes each orbit in 102 minutes. the radius of the earth is 6.38 106
A disk with the radius 0.60 m begins at rest and is then spun up to a high speed by applying an angular acceleration of 0.25 rad/s^2 for 20 seconds. What is the final angular velocity of the disk
A 140-m-wide river flows due east at a uniform speed of 3.9 m/s. A boat with a speed of 7.8 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. How long does it take for the boat to cross the river
A 91 g arrow is fired from a bow whose string exerts an average force of 115 N on the arrow over a distance of 78 cm. Illustrate what is the speed of the arrow as it leaves the bow?
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