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Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.013 meter. Water enters the hydrant through an underground pipe of radius 0.090 meter. In this pipe the water has a speed of 3.0 meter per meter.
(a) Find how many kilograms of water are poured onto a fire in one hour by all three hoses?
(b) Evaluate the water speed in each hose.
If you rub and inflated balloon against your hair and then place it against a neutral wall, the balloon sticks to the neutral wall. Define the mechanism by which the balloon sticks to the wall
a persons metabolic rate can be measured using what is called a flow calorimeter. the person is placed in a large
your physics teacher is holding a spinning wheel with angular momentum of 8 units upward while standing on a stationary
A girl coast down tha hill on a sled, reaching a levelsurface at the bottom with a speed of 7.0 m/s. how far does the sled travel on the level surface before coming to rest
A box (m1=1.2 kg) is being pulled up an (not necessarily frictionless) incline by another mass (m2=0.85 kg), which is descending straight down. How much energy did the hanging mass lose
A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is felled onto the first disk so that their centers align, and they stick together. The mass of the second ..
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The rms electric field of an electromagnetic wave increases from 307 to 921 N/C. Determine the wave intensities for the two values of the electric field
A crane which is effectively fixed to ground lifts a box of mass m with constant speed. The arm of the crane is supported at its base by a friction-free pivot. Determine the tension in the supporting cable
A 225 gram arrow is shot vertically into the air from an initial height of 1.40 meter above the ground with an initial speed of 18.6 m/s. obtain the amount of mechanical energy dissipated by air friction
400 L of water is at 4 oC. If it took a heat 600 seconds to heat this up to 6 oC, what is the power rating of the heater
A toroid having a square cross section, 4.40 cm on a side, and an inner radius of 13.1 cm has 660 turns and carries a current of 0.801 A. What is the magnitude of the magnetic field inside the toroid
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