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A firefighter mounts the nozzle of his fire hose a distance 30.5 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. After quenching a hotspot at a height of 9.45 m, the firefighter adjusts the nozzle diameter so that the water hits the building at a height of 18.7 m. By what factor was the nozzle diameter changed? Assume that the diameter of the hose stays the same, and treat the water as an ideal fluid.
eagan is inspired by performers in the run up of the 2012 london olympics and paralympic games and is determined to
An object is placed 40 cm from a concave mirror of radius 20 cm. Trace the image, show and find the location and characterize the image fully
A 100 kg block is pulled at a constant speed of 7.4 m/s across a horizontal floor by an applied force of 132 N directed 37° above the horizontal. find the rate at which the force does work on the block
A woman with a package in her hand is riding in a hot air balloon which is climbing at a constant speed of 8.0 m/s. How fast is the package going the instant before it hits the ground
The potential difference between two parallel conducting plates in vacuum is 475 V, What is the kinetic energy of the alpha particle when it reaches the other plate
An electron is accelerated horizontally from rest in a television tube by a potential difference of 25,000 V. At what angle will the electron be traveling after it passes between the plates
find the radius of curvature of the vertical profile of the road at A. Using value of the curvature found, determine the force exerted on a 160-lb driver by the seat of his 3100-lb car as the car, traveling at a constant speed of 50 mi/h, passes t..
An objects average density ? is defined as the ratio of its mass to its volume. What is the earth's average density
An inflated basketball has a gauge pressure of 9.0lb/in2. What is the actual pressure inside the ball
An 8,000 rocket is shot straight up from the Earth's surface with the initial speed of 800 m/s. How high does it go.
Water flowing out of a horizontal pipe emerges through a nozzle. The radius of the pipe is 2.4 cm, and the radius of the nozzle is 0.56 cm. determine the absolute pressure of the water in the pipe
A driver travels northbound on a highway at a speed of 22.0 m/s. What frequency does the driver detect after the police car passes him
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