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Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of -0.6020 N when separated by 50 cm, center-to-center. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.1101 N. What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here.
Two spheres of mass m and a third sphere of mass M form an equilateral triangle, and a fourth sphere of mass mB is at center of the triangle.
A small steel ball with a mass of 80 g is releasesd from a resting height of 1.25 m above a ridgid metal plate. What is the velocity of ball before impact.
A fan blade, initially at rest, rotates with a constant acceleration of 0.025 rad/s2. What is its angular speed at the instant it goes through an angular displacement of 4.2 rad.
George just graduated from college and is going on his first job interview. He has learned that there are two other candidates. Because of the information he has learned about the serial position effect, George asks to be either the first or the last..
A 23 gram bullet traveling 230m/s penetrates a 2kg block of wood and emerge clearly at 170m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after bullet emerges.
Two 24 cm focal-length converging lenses are placed 16.50 cm apart. An object is placed 39.0 cm in front of one. Where would the final image formed by the second lens be located.
The reflected sound is afterwards mixed with the transmitted sound, and 85 beats per second are detected. The speed of sound in body tissue is 1520m/s. compute the speed of the fetal heart wall at the instant this measurement is made.
Assume a 64 kg boy and a 42 kg girl use a mass less rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3 m/s2, find out the magnitude of the acceleration of the boy toward girl.
Calculate the dc voltage applied to the circuit.
What is the most amounts by which the wavelength of an incident photon could change when it undergoes Compton scattering from an atom or molecule with a 19 u mass .
A constant horizontal force a pushes a 4.40kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. The package's x and y velocity components versus time t.
Two identical freight cars roll without friction (one at 1 m/s, the other at 2 m/s) toward one another on a level track. They collide, couple, and roll away together with a combined momentum of.
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