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What is the efficiency of a pump that uses 3.5kW of electrical power in raising 200 litters of water through a height of 12m in 10 seconds? Take density of the water to be 1000kg/m3.
A 70 kg man (rad=0.25m) standing on a 10-kg disc (rad=0.4m) with his arms extended (rad=0.9m) holding a 15-kg weight in each hand. What is the rotational inertia of man with weights.
A small car with mass 0.690 travels at constant speed on the inside of the track that is a vertical circle with radius 5.00. If the normal force exerted by the track on the car when it is at the top of the track (point) is 6.00, what is the normal fo..
Light of wavelength 500 nm illuminates a round 0.50-mm-diameter hole. find the width of the central bright circle on the screen
Two positive charges of 7.40 micro-Coulombs are placed on a horizontal surface with a coefficient of static friction 0.72. If they are originally far apart.
Compute the value that the spring constant should have so that passengers undergo an acceleration of no more than 7.0 when brought to rest. Let be the total mass of the elevator and passengers.
What was the take-off speed? If this speed were increased by just 5.0%, explain how much longer would the jump be?
What is the tangential velocity of a satellite in a circular orbit 300km above the surface of the Earth, How long does the satellite take to complete one orbit
Consider an object attached to an ideal spring that oscillates according to the equation x=(34.0 cm) cos (8.10£) where £ is in seconds. what is the mechanical energy of the oscillations
A long line carrying a uniform linear charge density +56.0 µC/m runs parallel to and 10 cm from the surface of a large, Find the location of all points on a line perpendicular to the sheet and the charged line
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. Find the volume of the cylinder. Calculate the probable percent error in the length. Calculate the probable percent error..
If there is a section of the hose where the diameter decreases to 1.93 cm, what is the speed of the water in this section
A horizontal uniform bar of mass 2.9kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached the distance 0.74 m from the other end.
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