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A 0.12 kilogram block on a horizontal frictionless surface is attached to a spring whose force constant is 570 N/m. The block is pulled from its equilibrium position at x = 0 meter to a displacement x = +0.080 meter and is released from rest. The block then executes simple harmonic motion along the x-axis. Find the displacement of the block at time t = 0.20 s?
A pulsed proton beam is fireat a target each last 45.0ns and there 3.00 X 10^9 protons in each pulse, What is the average pressure on the beam spot during the pulse if the protons are absorbed by the target
A classroom demonstration is done with an Atwood machine. The masses are m1 = 1.0 kg and m2 = 1.14 kg. what is the acceleration of gravity at that place
A boat clashed on something and fell to the ocean floor, a few years later a few researchers sent a robot and found out that the pressure at the same level as the boat was 413 atm. The density of the seawater was 1025 kg/m cubed. what is the depht of..
A proton has a speed of 0.80c.Calculate the rest energy of the proton. Calculate the total energy of the proton
q1. an artillery shell is fired with the initial velocity of 305 ms at 67.0deg above the horizontal. to clear an
An object has a weight of 4.5N in air, 3.4N in water and 3N in a salt solution. If the density of the water is 1000km m^-3, what is the density of the salt solution
A girl delivering newspapers travels 1 blocks west, 2 blocks north, and then 6 blocks east. What is her resultant displacement
The woman then starts walking clockwise around the rim at .75 rad/s. in what direction and with what angular speed does the turntable rotate.
A hollow spherical shell with mass 2.25 rolls without slipping down a 37.5 slope. Find the acceleration of the shell. Find the friction force on it
How many 40W, 60lm/W fluorescent lamps would be needed to provide an illuminance of 250lm/m^2 on a factory floor of an area 25m x 30m? Suppose the lights are 10m above the floor and that half their flux reaches the floor
A 0.45 V potential difference is maintained across a 1.3m length of tungsten wire that has a cross-sectional area of 0.67 mm2 and the resistivity of the tungsten is 5.6 ×10−8 · m. What is the current in the wire?
A 1500-kg car moving east at 28.00m/s collides with a 1720 kg car moving south at 15 m/s and the two cars stick together.
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