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In the old days when we still used motor-less lawn movers, the mover was a roller with blades and a handle by which we would pull or push the mover. As the mover is pushed, the roller with blades would turn and you could cut the grass. One particular model of the mover had a roller of diameter of 19 inches. The roller weighs 200 lb. What is the minimal force you need to use to pull the roller over a 2 inch tall curb if the handle makes 30 Degree angle with the horizontal?
A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 6.0- cm radius. How far apart are the masses of the dumbbell
A 2 centimeter diameter parallel plate capacitor with a spacing of 0.50 millimeter is charged to 200 Volt. Determine the total energy stored in the electric field
A compound microscope has a tube that is 19.50 cm long. The focus of the eyepiece is 1.5 cm and the focus of the objective is 0.6 cm . If the distance for normal vision is 25 cm ,what is the approximate magnification of the microscope?
The yellow light from a helium discharge tube has a wavelength of 587.50. When this light illuminates a certain diffraction grating it produces a first-order principal maximum at an angle of 1.050.
the displacement in meters of an object moving in a straight line is given by s 1 2t t24 where is measured in
An AC generator rotating at 60 Hz in a 300 Gauss field has 1000 turns and produces an rms voltage of 150 volts, What is the area of each turn in the coil
Babe Ruth steps to the plate and casually points to left center field to indicate the location of his next home run. Find the magnitude of the force exerted by the shoulder
The drawing shows four insulated wires overlapping one another,forming a square with 0.050-m sides. All four wires are much longerthan the sides of the square. The net magnetic field at the centerof the square is 73 μT directed into the drawing. C..
A point charge Q = 8.50×10-6 C is at the center of a conducting spherical shell of radius R = 17.90 cm. What is the field just outside the shell
two conducting spheres, one of radius 6.0 cm, and the other of radius 120 cm, each have a charge of 20 nC, calculate the surface charge density of each sphere
Two point charges, +3.18 µC and -6.65 µC, are separated by 1.13 m. What is the electric potential midway between them
A rocket is launched from the surface of the earth with speed 2.00x104 m/s. What is the speed of the rocket at an infinite distance from the earth
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