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How is physics used in electricity in the past, present and the future.
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If 11.6 g of gold is deposited on the negative electrode of an electrolytic cell in a period of 3.03 hours, then what is the current through the cell during this period
When you push a 1.77 kg book resting on a tabletop, it takes 2.29 N to start the book sliding. Once it is sliding, but, it only takes 1.45 N to keep the book moving with a constant speed. What is the coefficient of static friction among the book and ..
Determine the absolute pressure in the duct, the gauge pressure in the duct and the atmospheric pressure, all in mm Hg.
Block M = 7.50 kg is initially moving up the incline and is increasing speed with a = 4.32 m/s2. What is the normal force N (in N) between the block and incline
A) Find v so that the rod swings up and is horizontal at the max height of the bob. B) Find the minimum v so that the rod will make a complete circle C) Find v so that the tension in the rod is zero at the top of its swing.
Two balls are projected simultaneously with the same speed from the top of the tower , one vertically upwards and the other vertically downwards. they reach the ground in 9sec and 4sec respectively. Calculate the height of the tower
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -89\mu C. How many excess electrons does she get
A 200-m-wide river flows due east at a uniform speed of 4.5m/s. A boat with a speed of 9.0m/s relative to the water leaves the south bank pointed in a direction 28o west of north. How long does it take for the boat to cross the river
An insect 1.1mm tall is placed 0.9 mm beyond the focal point of the objective lens of a compound microscope. Where is the image formed by the objective lens
A helium-neon laser beam has a wavelength in air of 633 nm. It takes 1.48ns for the light to travel through 31.0cm of an unknown liquid. What is the wavelength of the laser beam in the liquid
(a) What is the frequency heard by the pilot in the moving jet?
Two steel wires of the same length, one with radius r and the other with radius 2r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
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