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Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons.
(a) How many electrons are there in 4.95 liters of water? (1 liter is equivalent to 1.00 × 10-3 m3)
(b) What is the net charge of all these electrons?
A 100-W lightbulb has a resistance of about 12 ? when cold (20 ?C) and 140? when on (hot). Estimate the temperature of the filament
A fire hose ejects a stream of water at an angle of 31.20° above the horizontal. The water leaves the nozzle with a speed of 24.50 m/s. assume that the water behaves like a projectile, how far from a building should the fire hose be located to hit..
A 2.8-kg piece of aluminum at 28.5 degrees celsius is placed in 1.0 kg of water in a Styrofoam container at room temperature (20 degrees celsius)
An observer on the ground watches the boy throw the can and catch it. In this observer's ground frame of reference, explain the shape of can's path and determine the initial velocity of the can.
a worker drags a 310 kg crate at a constant velocity of 3 m/s, across a factory floor by pulling on a rope tied to the crate. What is the acceleration of the crate
A radio station broadcasts at a rate of 89.3 million cyces each second. what is the period of this wave and if the wavelength is 3.359 meters, what is the speed of this radio wave
A 9 m, 220 N uniform ladders rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50° angle with ground. How far up the ladder can an 850 N person climb before ladder beg..
The current in a 1.70mm Ã? 1.70mm square aluminum wire is 1.80A. compute the electron drift speed
A water-skier, moving at a speed of 9.15 m/s, is being pulled by a tow rope that makes an angle of 37.0° regarding the velocity of the boat (see the Illustrating). The tow rope is parallel to the water. The skier is moving in the similar direction..
A lens produces a magnification of -1.8 when an object is placed 2.5 cm from the lens. compute the focal length of the lens?
An ocean liner leaves New York City and travels 21° north of east for 134km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
The primary winding of a transformer has 1200 turns, and is connected to 120 V A.C. (r.m.s. value). The secondary has a 25 W load resistor, Continuing, how many turns are in the secondary winding
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