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A river 16.0 m wide and 5.0 m deep drains a 3000.0 km2 land area in which the average precipitation is 48 cm/year. One-eighth of this rainfall returns to the atmosphere by evaporation, but the remainder ultimately drains into the river. What is the average speed of the river?
In a diffraction experiment, light of 600. nm wavelength produces a first-order maximum 0.350 mm from the central maximum on a distant screen. find the wavelength of the light from the second source
A uniform plank of length 4.7 m and weight 221 N rests horizontally on two supports, with 1.1 m of plank hanging over the right support. To what distance x can a person who weighs 440 N walk on the overhanging part of the plank before it just begi..
two masses m1 and m2 move in a plane and interact by potential energy U(r)=1/2kr^2. write down their Lagrangian in terms of the CM and relative position R and r, and find the equations of motion for the coordinates X,Y,x,y. Describe the motion and fi..
A highway curve of radius 500 m is designed for traffic moving at a speed of 90 km/hr. What is the correct banking angle of the road
two strings with linear densities of g/m are stretched over pulleys, and attached to hanging blocks (string 1 is 20 kg=mass of block)-50 cm away. what is the unkown mass
A 5.66 microcoloumb and a -2.88microcoloumb charge are placed 16.9cm apart. Where can a third charge be placed
What is the resolving power of the objective if it is used in an oil-immersion microscope with n oil = 1.45
each plate of a parallel-plate capacitor is a square of side 4.75 cm and the plates are separated by 0.415 mm. the
A proton moving at 7.20 106 m/s through a magnetic field of magnitude 1.74 T experiences a magnetic force of magnitude 7.40 10-13 N. What is the angle between the proton's velocity and the field
A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
A factory worker pushes a crate of mass 32.0kg a distance of 4.85m along a level floor at constant velocity by pushing horizontally on it. How much work is done on the crate by this force
Gold, which has a density of 19.3 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber.
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