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Question
Electric charge on the earth's surface and in the earth's atmosphere produces an electric field that on a clear day is directed vertically downward and has a magnitude of about 100 N/C just above the earth's surface. Extremely small negative particles can be supported by the field. For large particles, the charge that must be carried may be so great that the field around the charge causes the surrounding air to conduct the charge away. This occurs at field of about 3.0 * 10^6 N/C in dry air. Find the radius of the largest water drop that could be supported in the earth's electrostatic field. Believe that the drop is spherical. Find out the radius.
If the piston has a cross sectional area of 0.0100 m^2 and negligible mass, how high would it rise when the temperature is raised to 250°C.
Suppose the pressure of the gas equals to p=aV^2, where a is constant. Find the heat transfer to the gas during this process if this is a reversible change.
A string is 41.0 cm long and has a mass of 3.00 g. A wave travels at 4.20 m/s along this string. what is the speed of a wave along the second string
An air bubble ascends from the bottom of a lake 15 m deep. The temperature at the bottom of the lake is 4oC, what would be the volume of the bubble at the top of the lake?
A 10cm -diameter cylinder contains argon gas at 10 atm pressure and a temperature of 60?C . A piston can slide in and out of the cylinder. What is the final length of the cylinder
An underwater scuba diver sees the Sun at an apparent angle of 45.0° above the horizon. What is the actual elevation angle of the Sun
Humid air breaks down in a sufficiently strong electric field, What is the magnitude of the electrostatic force for an electron and for an ion with a single electron missing
A circular loop of wire 66 mm in radius carries a current of 102 A. find the energy density at the center of the loop
Suppose the tension in a cord is 12.0 N. If the speed of a wave in the cord is 9.50 m/s, then what must be the linear mass density of the cord
Two charges of equal magnitude exert an attractive force of 3.0×10-4 N on each other. how far apart are the charges
How many homes could be heated with the waste heat
The Starship Enterprise returns from warp drive to ordinary space with a forward speed of 58 . To the crew's great surprise, a Klingon ship is 120 directly ahead, traveling in the same direction at a mere 30 .
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