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The rain soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. The sudden conversion of water to water vapor causes a dramatic expansion that can rip apart shoes. Water has density 1000 kg/m3 and requires 2256 kJ/kg to be vaporized. If horizontal current lasts 2.00 ms and encounters water with resistivity 160 Ω•m, length 12.0 centimeter, and vertical cross sectional area 1.4 x 10-4 m2, find what average current is required to vaporize the water? A
An aluminum wire having a cross-sectional area of 4.00 3 1026 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire
A 1 micro Farad capacitor is charged when it is connected across an 18 V battery. Find the final charge and the voltage across the plates
A 10 kg crate is pulled up a 30 degree incline with a rope parallel to the incline. The tension in the rope is 100 N. what is the acceleration of the crate up the incline
You are standing on the surface of a small spherical moon whose radius is 6.30 x 10^4 m and mass of 8.00 x 10^18kg. What maximum height above the surface of the Moon will the rock reach
q1. potassium iodide has an interplanar spacing of d 0.296 nm. a monochromatic x-ray beam shows first-order
Two protons (radius 10^-15 m) are headed directly toward each other with equal speeds. Use the principle of energy conservation to compute the minimum kinetic energy and initial speed each proton must have if they are to collide.
An object with mass 3.2kg is executing simple harmonic motion, attached to a spring with spring constant 260N/m, Calculate the maximum speed attained by the object
A spotlight on a boat is 2.5 m above the water, and the light strikes the water at a point that is 8.0 m horizontally displaced from the spotlight (see the drawing). The depth of the water is 4.0m. Decide the distance d, which locates the point where..
a 15m long string of mass 1.8 kg is stretched such that the tension in the string is 25 n. a wave of frequency 20 hz is
question1a car travelling at 110 rm kmh strikes a tree. the front end of the car compresses and the driver comes to
A 0.2-kg ball is bounced against a wall. It hits the wall with a speed of 20 m/s at a 10 degree angle and rebounds elastically at a 10 degree angle
Using the definition of entropy change, dQ = T dS, what is the entropy change of the hot reservoir
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