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Four spheres are arranged as in the figure in the corners of a 2cm-side square. The second sphere has a charge of -10 nC, the rest a charge of +10 nC. Point C is the center of the square, A is at the middle point of the side.
(a) Find, in components, the electric field at point C.
(b) Find the electric potential at points A and C.
(c) How much work is required to move a tiny charge of 10nC from C to A.
A football is punted with an initial velocity of 28.7 m/s and an initial angle of 54.1o. What is its hang time
An unmarked police car travelling a constant 80 km/h is passed by the speeder travelling 100 km/h. precisely l.0s after the speeder passes, the policeman steps on an accelerator; if the police car's acceleration is 2.0m/s2, how much time passes befor..
If the magnetic field in a traveling EM wave has a peak magnitude of 13.3nT, what is the peak magnitude of the electric field
A 6 kg block, starting from rest, slides down a frictionless incline of length 2 m. When it arrives at the bottom of the incline its speed is vf. At what distance from the top of the incline is the speed of the block 0.5 vf.
Boat A negotiates a curve whose radius is 363m. Boat B negotiates a curve whose radius is 110m. Each boat experiences the similar centripetal acceleration. What is the ratio of speed of boat A to that of boat B.
It has been claimed that an insect called the froghopper (Philaenus spumarius) is the best jumper in the animal kingdom, What is the velocity of the insect after it has accelerated through this short distance
A person can focus clearly only on objects between 37.5cmand 51.0cm from his eyes. Find the powers of the correcting contact lenses needed to correct his closeup vision and distant vision
The motion of a 25.0 kg mass on the end of a string is uniform circular motion. The magnitude of the tangential velocity of the mass is 5.0 m/s, Calculate the angular momentum of the mass
In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. If a helium nucleus with a mass of 6.68 10-27 kg.
A block is on a rough horizontal surface. A horizontal force of magnitude 3 N is applied to the block. What is the frictional force exerted on the block
What is the wavelength of the light in the glass
What is the charge on a 1.0 cm length of wire. What is the net force exerted on the skier.
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