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A pump is required to lift a mass of 770 kg of water per minute from a well of depth 14.2 m and eject it with a speed of 17.5 m/s.
A) How much work is done per minute in lifting the water?
B) How much kinetic energy does the pump give the ejected water?
C) What must be the power output of the pump?
A piece of rock weighs 301 N in air and has an apparent weight of 202 N when suspended under water. What are the volume and density of the rock
A spring is hung from the ceiling. A 0.300-kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
The springs of a 1400 kg car compress 6.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations.
Messages reach at random to be sent across a communications link with a information rate of 9600 bps. The link is 70 percent utilized, and the average message length is 1000 octets.
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met in practice. The voltmeter has an internal resistance of 8 x 10^9 Ohms and is used to measure the voltage across the resistor R2.
Find the minimum diameter of an l = 16.3 m long steel wire that will stretch no more than 7.39 mm when a mass of 343 kg is hung on the lower end
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass, how fast is the person running
The aim is to find the woman's position when thebeam begins to tip.
Suppose that electrical energy costs about $0.098/(kW · hour), If the electric potential provided by the electric company was 120 V, what was the average current in all circuits in the author's house
You want to shoot a 19cm long arrow parallel to this axle and through the wheel without hitting any of spokes. Suppose that the arrow and the spokes are very thin.
Starting from rest at the ground floor, an elevator takes 19.0 seconds for a vertical trip of 70.0 meters. What is the maximum velocity of the elevator
Determine the coefficient of kinetic friction between the block & the table.
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