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Two tiny conducting spheres are identical and carry charges of -21.4C and +51.0C. They are separated by a distance of 3.30 cm. (a) What is the magnitude of the force that each sphere experiences? (b) The spheres are brought into contact and then separated to a distance of 3.30 cm. Determine the magnitude of the force that each sphere now experiences.
use the inverse square law to display that in space shuttle territory, 200 kilometers above earth's surface, the force of gravity on a shuttle is about 94 percent of that at earth's surface.
Intuitively, the man will not catch the bus unless he is running fast enough. In mathematical terms, there is a constraint on the man's speed so that the equation above gives a solution for that is a real positive number.
How much Power does it take to accelerate the 70,000 lb rail car from rest to 10mph in 20 feet with 1ft dia. wheels.
A 9.10 kg board is wedged into a corner and held by a spring at a 50° angle, as the Illustrating shows. The spring has a spring constant of 196 N/m and is parallel to the floor.
Two parallel plates, each with an area of 110, are given equal and opposite charges of magnitude 0.18. The space between the plates is filled with the dielectric material, and the electric field within the dielectric is 0.31.
The flywheel of an engine has a moment of inertia 2.80 {rm kg} cdot {rm m} ^ {2} about its rotation axis. What is its final kinetic energy.
The concepts for finding the change in length of a rod.
A physicist has developed a device that generates a beam of alpha particles (each of which is a helium nucleus, consisting of two protons, two neutrons, and no electrons).
A 155 g copper bowl contains 245 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5 g being converted to steam. The final temperature of the system is 100°C. Neglect energy trans..
A bullet is fired through a board 10.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. The initial speed of the bullet is 400 m/s and it emerges from the other side of the board with a speed of 30..
The magnitude of the vector is 45.0 units and points in the direction 386 counter clockwise from the positive x-axis. Calculate the x-component of this vector.
what is the volume of an iron atom. What is the ratio of the mass density of girder A to the mass density of girder B.
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