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A 42 g ice cube at its melting point is dropped into an insulated container of liquid nitrogen. How much nitrogen evaporates if it is at its boiling point of 77 K and has a latent heat of vaporization of 200 kj/kg? Assume for simplicity that the specific heat of ice is a constant and is equal to its value near its melting point.
A 2.74-nF parallel-plate capacitor is charged to an initial potential difference ?Vi = 100 V and is then isolated. The dielectric material between the plates is porcelain, with a dielectric constant of 6. (a) How much work is required to withdraw the..
Assuming that the Earth is spherical and recalling that latitudes range from 0 degrees at the Equator and 90 degrees N at the North Pole, at what angle below the horizantol would the tunnel be directed
A copper container of mass 0.300kg contains 2.0 kg of lemonade at 33degree Celsius. What is the final temperature of the lemonade
A 2.0m length of metal wire is connected to a 1.5 V battery, and a current of 5.0mA flows through it. What is the diameter of the wire
question1a 58 kg pole vaulter running at 14 ms vaults over the bar. her speed while she is above the bar is 1.7 ms.
A molecule of DNA (deoxyribonucleic acid) is 2.22 µm long. The ends of the molecule become singly ionized, Determine the effective spring constant of the molecule
An electromagnetic wave of wavelength 405 is traveling in vacuum in the direction. The electric field has amplitude 2.20×10?3, What is the frequency of this wave
q1. an observer moving toward earth with a speed of 0.97 notices that it takes 5min for a person to fill her car with
An explosion breaks an object into two pieces, one of which has 1.48 times the mass of the other. How much kinetic energy did the heavier piece acquire
Assume that none of the alpha particles bounced back from the sheet, meaning that the alpha particles either were captured by the shielding or penetrated completely through the shielding.
Moon effect. Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 108 m..
A railroad car is released from a locomotive on an incline. what negative acceleration must it produce to bring the car to rest
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