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The density of copper is 8.91 g/cm3, and its atomic mass is 63.5. Assuming each copper atom contributes one mobile electron to the metal, obtain the number density of free charges in the wire, in electrons/m3? Use your results to determine the drift speed of the electrons in the wire?
A block of mass 10 kg is resting on a frictionless ramp. The ramp is free to slide on a horizontal, frictionless table and has a mass of 40 kg. What is the acceleration of the ramp
a particle of mass 0.000141 g and charge 18 mc moves in a region of space where the electric ?eld is uniform and is 5.4
a particle moves on the x axis attracted toward the origin o on itwith a force proportional to its instantaneous
A golf ball is struck at ground level. The speed of the golf ball as a function of time is shown in the figure below, where t = 0 at the instant the ball is struck. What is the maximum height above the ground level attained by the ball
A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. What was the magnitude of the dryer's angular acceleration
What is the resolving power of the objective if it is used in an oil-immersion microscope with n oil = 1.45
A steel strut near a ship's furnace is 1.80 m long, with a mass of 1.52 kg and a cross-sectional area of 1.00 10-4 m2. Find the change intemperature of the strut
What would happen to the gravitational force between Earth and the Sun. A reconnaissance plane flies 600 km away from its base at 240 km/h, then flies back to its base at 320km/h.
A novice skier, starting from rest, slides down a frictionless 13degree incline whos vertical height is 125m. how fast is she going when she reaches the bottom
Lightbulbs with the power ratings giving in the figure are connected in a circuit as shown. Find the power dissipated to each bulb
Two grams of liquid water are at 0 degree Celsius and anothertwo grams are at 100 degree Celsius. What is the mass (in gr) of the liquid water that remains
A pail of water is rotated in a vertical circle of radius1m, what two external forcces act on the water in the pail
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