What is the mass of the necklace
A 0.44 kg meter stick balances at its center. If a necklace is suspended from one end of the stick, the balance point moves 9.5 cm toward that end. What is the mass of the necklace?
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An electric dipole consists of charges +2e and -2e separated by 0.78 nm. It is an electric field of strength 3.6x10^6 N/C. calculate the magnitude of the torque on the dipole when the dipole moment is (a) parallel to (b) perpendicular to (c) anti
The rms speed of the molecules in 1.0 g of hydrogen gas is 1800 m/s. A) what is the total translational kinetic energy of the gas molecules?
A canoe has a velocity of 0.380 m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.520 m/s east relative to the earth. Find the magnitude of the velocity V c/r of the canoe relative to the river.
A 3.30 kg birdfeeder hangs from the tip of a 1.00 m pole that sticks up from the ground at a 65.0° angle. What is the magnitude of the torque exerted on the pole by the birdfeeder? Treat the bottom end of the pole as the pivot point.
Find the diameter of a cylindrical copper wire of the same length (having resistivity 1.70×10^-8 W×m) that would produce the same resistance.
At a maximum level of loudness, the power output of a 75-piece orchestra radiated as sound is 70.0 W. What is the intensity of these sound waves to a listener who is sitting 25.0 m from the orchestra?
Two trains, each having a speed of 28 km/h, are headed at each other on the same straight track. A bird that can fly 56 km/h flies off the front of one train when they are 56 km apart and heads directly for the other train. On reaching the other
A two-slit pattern is viewed on a screen 0.950 m from the slits. If the two third-order minima are 20.0 cm apart, what is the width of the central bright fringe? (This is the distance between the nearest minima which bracket the central fringe.)
On reaching the other train it flies directly back to the first train, and so forth. (We have no idea why a bird would behave in this way.) What is the total distance (in km) the bird travels?
Two moles of a monoatomic ideal gas are contained at a pressure of 1 atm and a temperature of 300k. 34166j of heat are transferred to the gas, as a result of which the gas expands and does 1216j of work against its surroundings. the process is re
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