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Jill ( 60kg) is swinging on a rope swing that is 4m long, at what frequency does Jill need to pump her legs to get the swing going higher?
A basketball player makes a jump shot. The 0.607 kg ball is released at a height of 1.97 m above the floor with a speed of 7.22 m/s, What is the work done on the ball by air resistance
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 89.6 and diameter 3.00 from a storage room to a machinist. Calculate the weight of the rod
A 77.5 kg bobsled is pushed along a hor- izontal surface by two athletes. After the bobsled is pushed a distance of 5.0 starting from rest, Find the magnitude of the net force on the bobsled
A source of electromagnetic waves radiates power uniformly in all directions at a single frequency. At a distance of 7.00 km from the source, What is the average power radiated by the source
You walk 1140 m east and then 860 m south in a total time of 16 min. Compute your average velocity for east and south
A flask is filled with 1.53 L (L = liter) of a liquid at 90.7 °C. When the liquid is cooled to 16.5 °C, find the coefficient of volume expansion of the liquid
There is air on both sides of a soap film. What is the smallest thickness that the soap film (n=1.42) can have and appear bright if illuminated with 431?nm light
A car of mass M = 900kg traveling at 50.0km/hour enters a banked turn covered with ice. What is the radius r of the turn
A charge q at the origin is at the back corner of an imaginary cube of edge length a. What is the electric flux through the shaded region (the plane at y=a)? (the picture that goes along with it shows a cube, and the side that is shaded is the vertic..
A long horizontal wire carries 26.0A of current due north. The Earth's field 22.0cm due west of the wire points north but downward, 47° below the horizontal, and has magnitude of 5.0×10-5T.
The electrric field between the plates of a parallel-plate capacitor is horizontal, uniform, and has a magnitude E. What is the magnitude of the electric field
A factory worker pushes a 34.0 kg crate a distance of 3.7 m along a level floor at constant velocity by pushing horizontally on it, How much work is done on the crate by the normal force
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