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A small sphere with a mass of 0.002g and carrying a charge of 5*10^-8C hangs froma thread near a very large, charged conducting sheet. The charge density on the sheet is 2.5*10^-9C/m^2. Find the angle of the thread.
A 0.43 kg soccerball is kicked with a velocity of 25 m/s at an angle of 37 degrees above the horizontal. What is the kinetic energy at the peak of its trajectory
An observer, whose eyes are 1.99 m above the ground, is standing 35.0 m away from a tree. The ground is level, and the tree is growing perpendicular to it. The observer's line of sight with the treetop makes an angle of 23.0° above the horizontal. Ho..
The coefficient of kinetic friction
Electrons are located at the points (0,1), (3,4), (1, 2). Find the net electric field at the origin
The dimensions of the picture on a 35.0{\rm mm} color slide are x = 24.0{\rm mm} {\times}y = 36.0{\rm mm}. What are the dimensions of the image on the screen
a 10,000kg open rail car rolls under a hopper at 1m/s. the hopper dispenses grain into the moving rail car, how much grain was loaded into the car
Use the pivot as the reference point because then two of the four forces on the plank exert zero torque. Which two? Since the plank is at rest, Find the normal force acting at the pivot point
A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He suddenly starts down a 10° incline. His speed at the bottom is 15 m/s. How long does it take him to reach the bottom
sketch a scaled ray diagram and show the location of the iamge using 3 principle rays, calculate the magnification of the object
A 0.030 kg lead bullet hits a steel plate, both initially at 20?C. The bullet melts and splatters on impact. What is the minimum speed the lead bullet must have in order to melt on impact
Two point charges Q1, and Q2 are place exactly on the x axis at -x1. A second particle Q2 is placed at +x2 on the positive x axis. What is the total E field at the origin
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0682 s, determine the vertical components of the launch velocity.
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