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In electronics it is customary to describe the potential of ground (thinking of the earth as a large conductor) as zero. Is this consistent with the fact that the earth has a net electric charge that is not zero? (Refer to ex. 21.32)
1. gaseous helium is to be used to quench a hot piece of metal. the helium is in storage in an insulated tank with
Unpolarized light passes through two polarizers in turn withpolarization axes at 45° to each other. What is the fraction ofthe incident light intensity that is transmitted?
An ocean liner leaves New York City and travels 56.0° north of east for 170 km. 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 following directions.
A 51kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 250N. For the first 10.5m the floor is frictionless, and for the next 10.5m the coefficient of friction is 0.18. What is the final speed of the crate af..
Physics - Classical Mechanics : explained, A student could either pull or push, at an angle of 300 from the horizontal, a 50-kg crate on a horizontal surface, where the coefficient of kinetic friction between the crate and surface is 0.20. The cra..
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 21 m/s, How far from where it was kicked will the ball land
a roller coaster has a hydraluic catapult propels the car to the top of the ride at a height of 405 ft. if the car and
2.00 mole of an ideal gas at 330k, 3.50 atm and 3.0L are isothermically compressed causing a change of entropy in the system equal to -25.0 J*K^-1. determine the final volume of the system
Calculate the de Broglie wavelength for a proton moving with a speed of 6.3 × 106 m/s. The mass of a proton is 1.67262 × 10-27 kg and Planck's constant is 6.62607 × 10-34 J · s
a 1200 kg car going 25m/s is brought to stop using its brakes. what is the change in temperature of the brakes and wheels
Liquid-detecting prism devices may be used in a washing machine or other liquid-containing devices. If no liquid covers the prism's hypotenuse, total internal refletion from the light source produces a large signal in the light sensor.
In an emergency stop to avoid an accident, a shoulder-strapseat belt holds a 60-kg passenger firmly in place. what was the average force applied to the passenger by the seatbelt
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