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Water is drawn from a well in a bucket tied to the end of a rope whose other end wraps around a solid cylinder of mass 50 kg and diameter 25 cm. As this cylinder is turned with a crank, the rope raises the bucket. The mass of a bucket of water is 20 kg. Someone cranks the bucket up and then lets go of the crank, and the bucket of water falls down to the bottom of the well. Without friction or air resistance, what is the angular acceleration of the 50-kg cylinder?
What is the wavelength of the peak of the blackbody radiation curve for something at 3,000 kelvins (the temperature of the filament of a light bulb)
A 100 W lightbulb produces 4.0 W of visible light. What is the light intensity on a wall 3.0 m away from the lightbulb
Physics: How much time is required to row cross the river? How wide is the river?, A river man can row his boat at a speed of 2.5 m/s through still water. He wants to row directly across a river that has a current flowing at 1.5m/s
Which of the planets fits the following description: "a solid, cool surface, with occasional dust clouds and a thin CO2 atmosphere".
A factory worker pushes a 29.0kg crate a distance of 4.3m along a level floor at constant velocity by pushing downward at an angle of 32? below the horizontal. What is the total work done on the crate
A tow truck is pulling a car out of a ditch by means of a steel cable (Y = 2.0 x 1011 N/m2) that is 9.63 m long and has a radius of 0.503 cm. How much has the cable stretched
The decay constant of Radon is .181/day. A sample of Radon contains 6.00x10^8 Radon atoms. How many atoms are left after 12 days
A 40 g block of ice is cooled to -78°C and is then added to 550 g of water in an 80 g copper calorimeter at a temperature of 24°C. find the final temperature of the system consisting of the ice
A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward), What is the horizontal displacement of the rocket when it returns to y=0
A block of mass 3.65kg and density 600 kg/m^3 floats in a bath of oil of density 970kg/m^3. calculate total volume of wood and metal
A horizontal beam of electrons initially moving at 4.0x10^7 m/s is deflected vertically by the vertical electric feild between oppositely charged parallel plates
How much work would it take to move a positive charge, 1uC, from the negative side of a parallel plate combination to the positive side when the voltage difference across the plates is 100V
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