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Using the Bohr model what is the radius of the electron orbit in the Hydrogen atom when the electron is in the n = 12 state?What is the energy of the Hydrogen atom when the electron is in the n = 3 state?
A student in an undergraduate physics lab is studying Archimede\'s principle of bouyancy. The student is given a brass cylinder and using a triple beam balance finds the mass to be 2.72 kg. calculate the volume of the cylinder
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
A light ray in air is incident on a transparent material whose index of refraction is n, Evaluate your expression for light incident on glass
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. A typical mantle contains 439 mg of thorium. What is the reactivity of the mantle
A pyramid has a height of 503 ft and its base covers an area of 12.0 acres, Find the volume of this pyramid in cubic meters
Brain injuries generally occur any time the brain's acceleration reaches 100 g for even a short time, Consider a car running into a solid barrier
if an acoustic wave from an echo sounder on a ship take .30 seconds to reach the sea-floor and reflected wave returns to the boat in .30seconds how deep is the water.
Two 34.8-cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. How far does the other end of the system of rods move
A block of mass 2.50 kg is pushed 3.00 m along a frictionless horizontal table by a constant 18.0 N force directed 25.0° below the horizontal. Determine the work done by the net force on the block
plane polarized light of intensity I0 is passed through two polarizers, the first one at 45 degrees to the original plane of polarization, what intensity is transmitted
A water pump lifts water from a well depth of 30 to ground level. How much work does the pump do by moving 3 m^3 of water
A student suspends two identical conductive spheres (m = 0.30g) from two equally long nylon threads each 25 cm long. What is the charge on each sphere
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