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An electron is moving in free space with a velocity equal to 105 m/s and is aiming at a stationary electron far away , How close can this electron get to the stationary electron before repulsive force turns it back ?
electron mass= 9.1*10^-31 kg
charge = 1.6*10^-19 C
A car is driven 155 km west and then 75 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
A total charge Q = 2.7 mC is distributed uniformly over a quarter circle arc of radius a=9.3 cm, What is lamda the linear charge density along the arc
A 56kg skier starts from rest at the top of a 1200-m long trail which drops a total of 230.00 m from top to bottom. At the bottom, skier is moving 11m/s. How much energy was dissipated by friction?
A train started from rest and moved with constant acceleration. Atone time it was traveling at 54.0 m/s. Calculate (a) the acceleration, (b) the time requited to travel at 160 m, (c) thetime required to attain the speed of 33.0 m/s and (d) the di..
A 500 gram dynamics cart starts at rest and rolls down a track thatis 2.5 meters long and elevated 15 cm on one end. At thebottom of the track it rolls onto a level surface and then collideswith a 1200 g cart that is sitting still. The collision i..
A telescope has an objective with a refractive power of 1.50 diopters and an eyepiece with a refractive power of 270 diopters
a pitcher delivers a fast ball with a velocity of 43 m/s to the south. the batter hits the ball and gives it a velocity of 51 m/s to the north. what was the average acceleration of the ball
when a pair of slits is illuminated by white light sometimes one orders rainbow will overlap with that of another
A 3.6 m long steel wire has a cross-section area of 0.047 cm2. Its proportional limit has a value of 0.0015 times its Young's modulus, What is the maximum weight that the wire can support
What minimum force is necessary to start the block moving up the wall? (Hint: The static frictional force is now directed down the wall.)
Susan's 12.0kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30? above the floor. Use work and energy to find Paul's speed after being pulled 3.20m
q1. two crates of mass 57 and 164 are in contact and at rest on a horizontal surface. a 650 force is exerted on the
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