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Water flows at 0.25L/s through a 11 meter long garden hose 2 centimeter in diameter that is lying flat on the ground. The temperature of the water is 20oC. Find the gauge pressure of the water where it enters the hose?
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question an achromatic lens is made of two very thin lenses with focal lengths f1 -28.7 cm and f2 20.4 cm that are
Skater A, mass 55.0 kg, moving at 14.0 m/s bumps into stationary Skater B, mass 65.0 kg. After the collision, Skater A moves at an angle of 53.1o from her original direction, What are the final speeds of the two skaters
A ball is dropped (from rest) straight down from atop a 32.0 m cliff. At the same instant, a ball at the ground level below the cliff is thrown straight upwards at a speed such that it would come to a (momentary) stop at the top edge of the cliff. Ho..
The radius of a park merry-go-round is 2.4 m. To start it rotating, you wrap a rope around it and pull with a force of 260 N for 11 s. What is the moment of inertia of the merry-go-round
A kangaroo can jump over an object 2.20 m high. What is the total time that it spends in the air
Study of the fragment
In order to clearly read a book 24 cm away, a farsighted girl needs an image to be 35 cm from her eyes. What focal length is necessary for lens in her eyeglasses.
In a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. Find the magnitude of the total acceleration of the ball
question1a block with mass m 5.3 kg is attached to 2 springs with spring constants kleft 33.0 nm and kright 49.0 nm.
A car parked in the sun absorbs energy at a rate of 590 watts per square meter of surface area. The car reaches a temperature at which it radiates energy at this same rate. Treating the car as a perfect radiator (e = 1), discover the temperature.
A woman who weighs 482 N is leaning against a smooth vertical wall,as the drawing shows. Find (a)the magnitudeof the force FN (directed perpendicular to thewall) exerted on her shoulders by the wall and the (b) horizontaland (c) vertical components ..
The speed of sound does not depend on the loudness or the frequency of sound. The speed of sound in dry air 0 degree celsius is 330 m/s. Explain how temperature and humidity affect the speed of sound.
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