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A 33.1-kg child runs with a speed of 2.80 m/s tangential to the rim of a stationary merry-go-round. The merry-go-round has a moment of inertia of 510 kg · m2 and a radius of 2.40 m. When the child jumps onto the merry-go-round, the entire system begins to rotate. Calculate both the initial and the final kinetic energy of the system.
a 300 watt toaster is plugged into a 120 volt house current.Electricity is sold at 15 cents per kilowatt hour. If the toasteroperates for 2.5 minutes what is the cost of its operation
A 103.29 cm-long steel string with a linear density of 2.56 g/m is under 240.31 N tension. What is the wavelength of the sound wave that reaches your ear in a 11.65oC room
A metal wire of resistance R is cut into three equal pieces that are then braided together side by side to form a new cable with length equal to one-third of the original length
the shaft of a pump starts from rest and has an angularacceleration of 3.00 rad/s2 for 18.0s. find the angle through which the shaft has turned
A Thermopane window of area 6.8 m2 is constructed of two layers of glass, each 5.4mm thick and separated by an air space of 2 mm. If the inside is at 12?C and the outside is at ?36?C, how much heat is lost through the window? The thermal conductivity..
A 0.250 kg block is placed on a vertical spring (k = 5.0 x 10^3 N/m) and pushed downward, compressing the spring 0.10 m. As the block is free, it leaves the spring and continues to travel upward. What height above the point of release would the bl..
In a classic carnival ride, patrons stand against the wall in a cylindrically shaped room. Once the room gets spinning fast enough, the floor drops from the bottom of the room! What is the speed of a person "stuck" to the wall
A boy scout ‘s girl scout girlfriend to test his scouting abilities has hidden her girl scout cookies somewhere in the forest and has given him the directions to retrieve them, How far away are the cookies
A group of students are camping in the middle of the forest on a very dark night. Their torch batteries went flat hours ago. find the speed of the unidentified noisy object
Furthermore, describe any differences in kinetic energy and gravitation potential energy among these balls while they hit the ground.
A 4.7- kg box of books is pulled up a 4.16- m-long inclined plank to a height of 1.8 m. What percent of the work is lost to friction
A laser beam enters a 15.5 cm thick glass window at an angle of 37.0° from the normal. How long does it take the beam to pass through the plate
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