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A fire hose 3.51 cm in diameter is capable of spraying water at a velocity of 24.7 m/s. For a continuous horizontal flow of water, what horizontal force should a fireman exert on the hose to keep it stationary?
A metal sphere of mass M and radius R is charged up so that its surface is at an electric potential V. What is the electric potential at the center of the sphere
A spherical balloon has a radius of 7.35 m and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 930 kg? Neglect the buoyant force on the cargo volume itself?
the normal human eye has maximum visual acuity with a pupil size of about 3 mm. for larger pupils acuity decreases due
A charge of 15.0 uC is plaed at the center of a cube. Each side of the cube has an area of 4.50 cm^2 calculate The total electric flux passing through the surface of the cube
ultrasound is used to view the interior of the body much as x rays are utilized. for sharp imagery the wavelength of
The weight of an object at the surface of a planet isporportional to the plants mass and inversely porportional to thesquare of the radius of the plane, How much would it weigh on Jupiter
A hoist motor supplied by a 240 V source requires 12 A to lift an 800 kg load at a rate of 9.00 m/min. Determine the power input to the motor
A batter hits a baseball m = 0.48 kg from rest with a force of F = 86 N, The ball is in contact with the bat for t = 0.26 s. How far did he ball travel horizontally in meters
Two long parallel wires carry currents of 2.71 A and 5.93 A. Find the separation distance of the wires
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 292.0 Hz. The tuner hears 2.0 beats per second. By what percentage did the tuner increase the tension on that string
A 2100-? resistor and a 1.4-µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms). Determine the average power delivered to the circuit
a ball of mass 2.0 kg is traveling towards you at 15 ms. you are at rest and have a mass of 70 kg.a. assuming you catch
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