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A 15 g piece of Styrofoam carries a net charge of -5.1 µC and floats above the center of a large horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per unit area on the plastic sheet?
Consider a heat engine that operates between thermal reservoirs at 510 K and 242 K. Suppose the engine does 4900 J of work while it expels 103 J of energy to the cold reservoir. Is this engine possible in the real world? Hint: Violations of the secon..
the san vicente reservoir north of san diego currently has a residence time for water of approximately 14 days. the
An aluminum rod is 18.0 cm long at 20°C and has a mass of 350 g. If 12500 J of energy is added to the rod by heat, what is the change in length of the rod
If an object is projected upward with a velocity of 7.3 m/s at an angle of 25 degrees, how far in the horizontal direction did it travel
1. calculate the speed of a proton after it accelerates from rest through a potential difference of 290 v . express
A spacecraft of 140 kg mass is in a circular orbit about the Earth at a height h = 3RE. What is the spacecraft's kinetic energy
a monkey escapes from the zoo and climbs a tree. after failing to entice the monkey down the zookeeper fires a
On a dry day, just after washing your hair to remove natural oils and drying it thoroughly, run a plastic comb through it. Small bits of paper will be attracted to the comb. Explain why.
You have a solid conducting sphere (radius A, net charge -2Q) surrounded by a conducting spherical shell (inner radius B, outer radius C, net charge +3Q). What is the electric field everywhere
you are on a boat heading out to sea. the boat is going 5ms toward a buoy the origin in your chosen frame of reference
A particle of mass m0 is given a kinetic energy equal to one-third its rest-mass energy. How fast must the particle be traveling
What are the advantages of placing capacitors in parallel?What are the disadvantages? What are the advantages of placing capacitors in series? Whatare the disadvantages?
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