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Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.017 m. Water enters the hydrant through an underground pipe of radius 0.090 m. In this pipe the water has a speed of 2.5 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.
The electric output of a power plant is 730MW . Cooling water flows through the power plant at the rate 1.30 ×108L/hr. What is the power plant's thermal efficiency
A baseball is hit at Fenway Park in Boston at a point 0.626 m above home plate with an initial velocity of 31.00 m/s directed 50.0° above the horizontal. find the vertical distance by which the ball clears the wall
A parallel light beam containing two wavelengths, 480nm and 700nm, strikes a plain piece of glass at an angle of incidence of 60 degrees. Determine the angle between the two beams in the glass
Two insulated spheres have radii r1 and r2, and charges q1 and q2, What is their combined kinetic energy when they collide, in terms of the variables above, and k the constant in Coulombs Law
What is an angular speed of the small cylinders, which is between two inner and outer cylinders
Four point charges have the same magnitude of 2.3 × 10-12 C and are fixed to the corners of a square that is 3.8 cm on a side, Determine the magnitude of the net electric field that exists at the center of the square
A 170-turn circular coil has diameter 5.05cm and resistance 1.20? . A magnetic field perpendicular to the coil is changing at 1.20T/s
A 4 kg fish swimming 3 m/s swallows an absent minded 2 kg fish at rest. What is the speed of the large fish instantly after lunch.
An electric dipole is formed from ±1.0nCcharges spaced 2.00mm apart, What is the electric field strength at the points (x, y) = (14.0 cm , 0 cm),(x, y) = (0 cm, 14.0 cm)
a detector has a sensitivity of 10^6 V/W and a NEP* = 10^-10 W/Hz^1/2. Light of 1E-6 W power is measured with the detector, what is the signal
If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Suppose right is the positive direction.)
Coherent ligh of a wavelength 500nm passes through a narrow slit. In the single-slit diffraction pattern observed on a screen that is 4.0m from the slit, what will the width of the central maximum be
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