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An object is placed 30 cm from a converging lens forms an image 40 cm from the lens. What is the focal lenght of the lens? is the image which is formed real or virtual?
Jaime has a 4-kilogram mass on a 3 meter string, and he is swinging it around in a circle. How much force is Jaime using to pull the mass toward himself
A moving particle encounters an external electric field that decreases its kinetic energy from 9710 eV to 8150 eV as the particle moves from position A to position B. Determine the charge of the particle
Estimate the time constant in a RC circuit.
At t=0, the displacement x(0) of a block attached to a spring is -850 cm. The block's velocity v(0) is then -.920m/s, what is the abgular frequency of this system
A loop of diameter 15 cm is placed in a uniform electric field of magnitude 6.0 102 N/C. (a) What is the electric flux through the loop when the electric field is perpendicular to the plane of the loop? N·m2/C.
If the refractive index of air is 1.00029 and all the air is pumped out of the cell, how many fringe-pairs will shift by
A space traveler weighs 565 N on earth. What will the traveler weigh on another planet whose radius is 3 times that of earth and whose mass is twice that of earth.
A 106 m long train begins uniform acceleration from rest. The front of the train has a speed of 23 m/s when it passes a railway worker who is standing 230 m from where the front of train started. What will be the speed of last car as it passes the..
A dockworker applies a constant horizontal force of 82.0N to a block of ice on a smooth horizontal floor, What is the mass of the block of ice
Extimate the thickness of a glass at a bright fringe and the Brewster's angle for light traveling from air to glass.
In 1911, Ernest Rutherford discovered the nucleus of the atom by observing the scattering of helium nuclei from gold nuclei. how close will the helium atom come to the gold nucleus
The electric potential at a position located a distance of 19.8 mm from a positive point charge of 7.80×10-9C, Calculate the value of the second charge
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