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Two point charges are located along the x axis. q1= +6.0 uC at x1 = +4 cm and q2 = +6uC at x2= -4 cm. Two other charges are located on the y axis q3 = +3 uC at y3=+5cm and q4= -8 uC at y4=+7 cm. Find the net electric field ( magnitude and direction) at the origion.
A ball and a thin plate are made from different materials and have the same initial temperature. At what temperature will the ball fall through the hole in each arrangement
A 150 g ball and a 250g ball are connected by a 35{rm cm}-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm.
Two capacitors, one 12.0 μf and the other of unknown capacitance, are connected in paralel across a battery of EMF 9.0V. The total energy stored in the two capacitors is 0.0115 J. What is the unknown capacitance, C
Find the charge-to-mass ratio of an unknown point charge that is repelled strongly enough from a single electron to be suspended motionless against its own weight
High-voltage power lines are a familiar sight throughout the country. What is the resistance of ten kilometers of this wire
It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm; the calculation is similar. A person's leg measures 39 cm between the knee and the hip, with an average leg diamete..
A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm, what is the density of the proton
Two charge distributions, Q1=1.4X10^-10C and Q2=3.5X10^-10, WHat is the force between them and the electric field between them?
A variable force, given by the analytical expression F = 3x2 with x in meters, acts on an object, changing only the kinetic energy of the object. Assume the particle starts out at x=0. a) Make a sketch of the force acting on the object as a function ..
A cylinder of mass 8.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed of 11.0 m/s. Determine the translational kinetic energy of its center of mass
a simple atwoods machine uses two masses m1 and m2. starting from rest the speed of the two masses is 5.0 ms at the end
A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. With what initial velocity were the keys thrown
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