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A 90--nozzle with exit diameter d is attached to a hose of diameter 3d with pressure p. The nozzle changes the direction of the water flow from the hose through an angle of 90-. Calculate the magnitude of the force of the water on the nozzle if
(a) p ¼ 200 kPa, d ¼ 1 cm
(b) p ¼ 400 kPa, d ¼ 6 mm
(c) p ¼ 300 kPa, d ¼ 1.2 cm (d ) p ¼ 500 kPa, d ¼ 2.2 cm
Avogadro's number of water molecules has a mass of 18 gram. If we were somehow able to move an electron from one out of every 109 molecules in a gram of water, what would be its charge
Calculate the derivative of the speed of sound in air by respect to the absolute temperature, and show that the differentials dv and dT obey dv/v = 1/2 dT/T. Use this result to estimate the percentage change in the speed of sound when the temperature..
A 3 dimensional infinite square well potential of length 1.0e-6 is occupied by 12 electrons. The system is at temperature 0 K and interaction between electrons can be neglected. Half are spin up and half are spin down. What is the higheat occupied en..
a a football player kicks a football in a field goal attempt. when the football reaches its maximum height what is the
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a wire has a length of 6.52 times 10-2 m and is used to make a circular coil of one turn. there is a current of 4.31 a
When a substance is boiled, what happens to the mass?
a curling stone with a mass of 20.0 kg slides across the ice at 1.50 ms. it collides head on with a stationary 0.160-kg
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