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A cube of mass m1 = 3.2 kg is sitting on top of another cube of the same size and mass m2 = 9.6 kg while they are both in free-fall. What is the magnitude of the normal force with which the top cube is acting on the bottom cube?
A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 8.0- cm radius. How far apart are the masses of the dumbbell
A sparrow's maximum air speed (speed relative to the air around it) is 20 m/sec. She wants to fly to her nest which is due north, but there is 10 m/sec wind blowing from west to east. What direction should she fly?
14 electrons are placed on a metal sphere. if the potential of the sphere is -38 V, what is the radius?
Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can while it reaches bottom.
A string 1.5 meter long with a mass of 2.5 gram is stretched between two fixed points with a tension of 99 Newton. Obtain the frequency of the fundamental on this string
A small Statue recovered by an archaeological dig. its weight is measured to be 4.4 lb and its volume .008 ft^3. What is the statues weight density?
If the atmospheric pressure is 1.1Af-10 raise to the power 5 Pa, the corresponding downward force on the top of a horizontal square areas 6cm on each side is approximately. show calculation.
A father racing his son has 2/3 the kinetic energy of the son who has 2/3 the mass of the father. What is the origianal speed of the father
A person makes a quantity of iced tea by mixing 500g of hot tea (basically water) with an equal mass of ice at its melting point. Suppose the mixture has negligible energy exchanges with its environment.
A uranium nucleus with a charge of 92e can spontaneously decay into a thorium nucleus of charge 90e and an alpha particle of charge 2e. what is the initial potential energy
Show that, if the Kelvin thermoelectric effect did not exist (i.e., if τAB were zero), then the voltage produced by a thermocouple would always depend linearly on temperature.
A uniform rope of mass m and length L is hanging straight down from the ceiling. A small-amplitude transverse wave is sent up the rope from the bottom end. Derive an expression that gives the speed v of the wave on the rope in terms of the distanc..
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