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A pump is needed to lift 750 L of water per minute a distance of 25.0 M. What power (in KW) must the pump be able to deliver? (1L of water has a mass of 1 kg.)
A beam of protons at an accelerator creates a current of 120 mu/A. how many protons strike the target in 30.0 s
The drive motor is shifted to turn the carousel at a higher constant rate of rotation, Calculate the coefficient of static friction between the bag and the carousel
A 0.59-kg object connected to a light spring with a force constant of 24.0 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
The 65.0 kg climber in the figure is supported in the "chimney" by the friction forces exerted on his shoes and back. What is the minimum normal force he must exert
A 795 kg car moving at 26 m/s brakes to a stop. The brakes contain about 15 kg of iron, that absorbs the energy. What is the increase in temperature of the brakes.
irplane A , starting from rest with constant acceleration, requires a runway 600m long to become airborne. How long must the runway be for airplane B
A 0.145 kg baseball pitched at 42.0 m/s is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s. calculate the average force between the ball and bat
Box moves back and forth on a horizontal frictionless surface between two different springs, as shown in the accompanying figure. The box is initially pressed against the stronger spring, compressing it 4.1cm , and then is released from rest
if two neutral conducting pop cans are touching each other and a positively charged ballon is brought near them then
What is the force exerted by the scale if the elevator is accelerating downward with an acceleration of 2.6 m/s2. If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.6 m/s2, illustrate what is ..
The brakes are applied to a car traveling on a dry, level highway. A typical value for the magnitude of the car's acceleration is 5.45 m/s2. If the car's initial speed is 33 m/s, how long does it takes to stop and how far does it travel, starting ..
A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
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