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A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.60 cm. The hose ends with a nozzle of diameter 2.20 cm. A rubber stopper is inserted into the nozzle. The water level in the tank is kept 7.50 m above the nozzle.
(a) Calculate the friction force exerted on the stopper by the nozzle.
(b) The stopper is removed. What mass of water flows from the nozzle in 2.00 h?
(c) Calculate the gauge pressure of the flowing water in the hose just behind the nozzle.
An oscillating block-spring system has a mechanical energy of 1.00 J, an amplitude of 10.0 cm, and a maximum speed of 1.20 m/s. find the mass of the block, and the frequency of oscillation
The only force acting on a 3.0 kg body as it moves along the positive x axis has an x component Fx = -7x N, What is the velocity of the body at x = 4.9 m
A 1300kg car drives around a flat 190m diameter circular track at 30 m/s. What is the magnitude and direction of net force on the car.
A copper wire that is 1 mm thick and 30 cm long is connected to a 1 V battery. What is the power dissipated in the wire at this temperature
If the skier's speed at point A in the figure below is 8.1 m/s, illustrate what is the normal force exerted by the snow on the skier at point B? Ignore frictional forces.
When diving for prey, bald eagles can reach speeds of 200 mph (322 km/h). Suppose a 6.0kg eagle flying horizontally at 322 km/h suddenly grasps, What's the eagle's speed just after grasping the rabbit
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.40 cm, and a -2.30 µC charge is located at y = -1.60 cm. Find the total electric potential at the origin
Two cars collide head on while each is traveling at 90. What is the temperature increase of each car
A bottle has a mass of 27.00g when empty and 93.90g when filled with water. What is the specific gravity of this other fluid
An astronaut on a space walk is floating away from her space ship at a speed of 0.15 m/s. In order to change directions, What is the mass of the ejected gas
find magnitudes of the tension forces in the first two ropes. what is the velocity of the cart when it reaches its greatest y coordinate.
A uniform disk of radius 0.459 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
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