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A child holds a sled on a frictionless, snowcoveredhill, inclined at an angle of 30?.72 NF30?If the sled weighs 72 N, find the force exertedon the rope by the child. Answer in units of N.
A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1.750 diopters. How far is her near point from her eyes
A 700 kg piston is initially held in place by a removable latch above a vertical cylinder. The cylinder has an area of 0.1 m^2; the volume of the gas within the cylinder is initially 0.1 m^3 at a pressure of 10 bar.
A bowling ball, which is approximately a smooth round sphere 8.6 inches in diameter and weighing 15 lbf, is dropped into a swimming pool. Discover its terminal velocity of descent in the water.
A golf ball (mass = 46 g) is struck by a golf club (mass = 210 g). The club head's velocity, how fast is the ball moving after impact
Block A of mass 11.1 kg lies on a 60.0o incline with a coefficient of friction of 0.545, and block B of mass 1.06 kg is attached to a vertical spring of force constant 210 N/m. The blocks are initially at rest with the spring at equilibrium. Find ..
Use this expression above to obtain the temperature change dT in terms of an increase dλ inthe extension ratio asdT = σρcdλwhere σ is the engineering stress (load divided by original area) and ρ is the mass density.
a 1000 mw power plant is operated for a year. it has a thermal efficiency of 32 and a utilization factor of 0.8. assume
A 1.5kg block intially at rest at the top of a 3m incline with a slope of 30degrees begins to slide down the incline. How fast is the block moving midway along the inlcine
Consider a model of a hydrogen atom in which an electron is in a circular orbit of radius = 5.79×10?11 around a stationary proton. What is the speed of the electron in its orbit?
Three point charges, -6.05 10-9 C, -9.40 10-9 C, and +7.25 10-9 C, are fixed at different positions on a circle. What is the radius of the circle
The distance between two successive maxima of a transverse wave is 1.20m. Eight crests, or maxima, pass a given point along the direction of travel every 12.0s. Calculate the wave speed.
A square metal plate of edge length 12 cm and negligible thickness has a total charge of 7.2 x 10-6 C. Estimate the magnitude E of the electric field just off the center of the plate (at, say, a distance of 0.39 mm from the center) by assuming tha..
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