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a pop up toy has a mass of 0.020 kg and has a constant of 150 N/M. a force is applied to the toy to compress 0.050m. calculate PEgained by spring compression. Find speed of toy after spring isreleased and the toy accells past its equilibrium point.
The intensity of an electromagnetic wave is 8 x 10^7 W/m^2. What is the amplitude of the magnetic field of this wave
Two identical pucks are on an air table. Puck A has an initial velocity of 2.5 m/s in the positive x-direction. What is the speed and direction of puck B after the collision
Usain Bolt is running a 100m dash. He accelerates to top speed over the first 45 m, then runs at a constant speed for the last 55 m, What is his top speed
question a 2590-kg spacecraft is in a circular orbit 2720 km above the surface of mars.how much work must the
A particle is uncharged and is thrown vertically upward from ground level with a speed of 25.0 m/s. As a result, it attains amaximum height h. The particle is then given a positive charge +qand reaches the same maximum height h when thrown vertica..
suppose the water at the top of niagara falls has a horizontal speed of 3.1 ms just before it cascades over the edge of
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
A violin string 12.5 cm long and fixed at both ends oscillates in its n = 5 mode. The speed of waves on the string is 268 m/s, and the speed of sound in air is 348 m/s. What are (a) the frequency and (b) the wavelength of the emitted sound wave?
Suppose that you have a 470 , a 900 , and a 1.30 k resistor. What is the maximum resistance you can obtain by combining these
Transverse waves with a speed of 44.5 m/s are to be produced on a stretched string. A 6.00 m length of string with a total mass of 0.0600 kg is used. What is the required tension in the string
An electron and a positron have masses of 9.11 10-31 kg. They collide and both vanish, with only electromagnetic radiation appearing after the collision. determine the energy of the electromagnetic radiation
142.3 cm and not more than 142.6 cm. What is the relative uncertainty of the measurement
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