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A block of mass 0.440 kg is hung from a vertical spring and allowed to reach equilibrium at rest. As a result the spring is stretched by 0.691 m. Find the spring constant.
A missile launcher, of mass 4400 kg, fires horizontally a rocket of mass 100 kg and recoils up a smooth inclined plane, rising to height of 4.0 m. discover the initial speed of the rocket.
A square, single-turn coil 0.25 m on aside is placed with its plane perpendicular to a constant magneticfield. An emf of 18 mV is induced inthe winding when the area of the coil decreases at a rate of0.08 m2/s.
as an electron moves through a region of space its speed increases from 3.00 106 ms to 7.20 106 ms. the electric force
A hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. Calculate the buoyant force exerted by the water on the sphere
A man is leaning against the vertical smooth wall. His back is touching the wall and his feet are away from the wall therefore there is an angle formed by her legs. Find the normal force exerted under the shoulders by wall
An electron initially at rest is accelerated between two parallel plate 2.000 cm apart, What kinetic energy does the electron have when it hits the positive plate
The machinist likes to listen to music, and plays a Boom Box at an average level of 82.0 dB. Calculate the INCREASE in the sound level from the ambient work environment level (in dB) when the boom box is playing as described.
A uniform 1.3-kg rod that is 0.76 m long is suspended at rest from the ceiling by two springs, one at each end of the rod. Find the angle that the rod makes with the horizontal
A diving board of length 3.00m is supported at a point 1m from the end, and a diver weighing 520 m stands at the free end . The diving board is of uniform cross section and weighs 270m.
A 670-W space heater is designed for operation in Germany, where household electric outlets supply 230 V (rms) service. What is the power output of the heater
It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). What is the angular speed of the earth
Light waves with two dissimilar wavelengths, 632 nm and 474 nm, pass simultaneously during a single slit whose width is 5.71 x10-5 m and strike a screen 1.30 m from the slit. Two diffraction patterns are formed on the screen.
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