Find out the gravitational potential energy
A 200-N child is in a swing that is attached to ropes 2.00 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
(a) when the ropes are horizontal
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A pair of eyeglass frames is made of epoxy plastic. At room temperature (20.0°C), the frames have circular lens holes 2.30 cm in radius. To what temperature must the frames be heated if lenses 2.33 cm in radius are to be inserted in them? The
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Coherent light with wavelength 592 nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 {rm m} from the slits. The first-order bright fringe is a distance of 4.84 {rm mm} from the center
A 55-kg skier is going down a slope oriented 40° above the horizontal. The area of each ski in contact with the snow is 0.13 m2. Determine the pressure that each ski exerts on the snow.
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Calculate the magnitude of the force. Calculate the magnitude of the normal force exerted by the window on the brush.
What is the direction of the electric field at point P, on the perpendicular bisector of the rod? Velocity of flow makes angle A full Gaussian surface encloses two of the four positively charged particles.
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