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Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.023 m. Water enters the hydrant through an underground pipe of radius 0.077 m. In this pipe the water has a speed of 2.7 m/s.
(a) How many kilograms of water are poured onto a fire in one hour by all three hoses?
(b) Find the water speed in each hose.
A 480 W heating coil designed to operate from 100 V is made of Iron wire 0.548 mm in diameter, calculate the length of wire used
Calculate the intensity distribution
Ignoring the mass of the spring, what is the mass of the fish?
Relative to the ground, a car has a velocity of 16.8 m/s, directed due north, What is the magnitude of the truck's velocity relative to the ground
A pulley system is used to lift a piano 3.4 m. The acceleration of gravity is 9.81 m/s2 . If a force of 2315 N is applied to the rope as the rope is pulled in 17 m, what is the efficiency of the machine
A 1.9 kg object that stretches a spring 8.8 cm from its natural length when hanging at rest oscillates with an amplitude of 6.5 cm, Find the total energy of the system
A 130-g baseball, moving along the x-axis with speed 29.0 m/s strikes a fence at a 45 degree angle and rebounds along the y-axis with unchanged speed. Give x and y components of its change in momentum.
A glucose-winged gull, ascending straight upward at 5.20 m/s drops a shell when it is 12.5 m above ground.
How much friction must be exerted between the skates and ice.
What is the size of the gravitational force that the Earth exerts on the Moon.
An 845-N sled is pulled a distance of 186m. The task requires 1.2 multiplied by 104 J of work and is done by pulling on a rope with a force of 133-N. At what angle is the rope held.
Illustrate what is the maximum height of each ball after the elastic collision? What are the coordinates of the CM of the two balls when the lighter ball was pulled up? Consider the heavier ball to be at the origin before the collision.
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