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A 3.0 g. copper penny has a positive charge of 0.52 millicoulombs. What decimal fraction of its electrons has it lost?
A vector is given by Rvec = 1.70 ihat + 2.30 jhat + 2.99 khat. Find the magnitude of Rvec
A cube of ice is taken from the freezer at -7.2 ?C and placed in a 115g aluminum calorimeter filled with 318g of water at room temperature of 20.0 ? C. What was the mass of the ice cube
A man traveling on a bicycle at 10 m/s along a straight road that runs parallel to some railroad tracks. What frequency is heard by a stationary observer located between the train and the bicycle
A tank holds a layer of oil, 1.65 m thick, which floats on a layer of syrup that is 0.83 m thick. Both liquids are clear and do not intermix. A ray, The index of refraction of the syrup is
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 11.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge ha..
Shantel was the sole owner of the residence until it was sold. Explain how much of the gain may Shantel and Daron exclude?
At what angle does it leave the field region?
What is the spring constant of each spring if the empty car bounces up and down 1.4 times each second?
A 250 kg weather rocket is loaded with 100kg of fuel and fired straight up. It accelerates upward at 32m/s2 for 34 s, then runs out of fuel. overlook any air resistance effects.
A gymnast of mass 60kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
The cable lifting an elevator is wrapped around a 1.0--diameter cylinder that is turned by the elevator's motor. The elevator is moving upward at a speed of 2.3 . It then slows to a stop, while the cylinder turns one complete revolution.
A pump uses a piston of 15 cm diameter which moves 2 cm/s. What is the fluid velocity of a tube 3mm in diameter
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