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A proton accelerates from rest in a uniform electric field of 640N/C. At some later time, its speed is 1.20 x 106m/s.
a) Find the magnitude of the acceleration of the proton?
b) How long does it take the proton to reach this speed?
c) How far has it moved in this interval?
d) What is its kinetic energy at the later time?
A cylinder of mass 250 kg and radius 2.60 m is rotating at 4.00 rad/s on a frictionless surface when two more identical non-rotating cylinders fall on top of the first. What is this final angular velocity
what is the Tension in the string, distance of spheres from one another at equilibrium, the charge on each sphere.
A 48dB sound wave strikes an eardrum whose area is 4.2×10?5m^2. How much energy is absorbed by the eardrum per second
George, Romeo's not often heard about older brother, was also quite in love with Juliet. One night he tried to climb a 10 m long, find the coefficent of friction between the ladder and the grass
Race tracks use walls which will compress when a car hits them at a high rate of speed. Find the spring constant of the wall
The drive propeller of a ship starts from rest and accelerates at 3.10 x 10-3 rad/s2 for 2.60 x 103 s. Find the total angular displacement of the propeller
If it takes 2.25 minutes to heat water in a 250 gm copper kettle from 20 °C to 85 °C, using a 700 W burner, how much water must be in the kettle
Suppose you are standing at the bottom of a swimming pool looking up at the surface, which we assume to be calm. Looking up, you will see a circular window to the "outer world." If your eyes are approximately1.6meters beneath the surface, what is ..
Calculate the electric field from four point-charge: +q at -d and -q at -d/2; 2q at d and -2q at d/2 on the z-axis, First calculate the electric potential, and then calculate its radient.
A tennis ball rolls off the edge of a tabletop 0.850 above the floor and strikes the floor at a point 1.60 horizontally from the edge of the table. Find the time of flight of the ball.
A 4.5-g object moving to the right at 30 cm/s makes an elastic head-on collision with a 9-g object that is initially at rest. What fraction of the initial kinetic energy was transferred to the 9-g block
An Atwood machine consists of two masses, = 6.5 and = 8.5 , linked by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass 0.80 .
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