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In the Bohr model of the hydrogen atom, an electron in the5th excited state moves at a speed of8.76*104 m/sin a circular path having a radius of 1.32*10-9 m. What is the effective current associated with this orbiting electron?
A certain element has a mass per mole of 54.9380 g/mol. How many moles of atoms are in a 268-g sample
A uniform electric field exists in a region between two oppositely charged plates. What is the speed of the electron as it strikes the second plate
two converging lenses each of focal length 15.2cm are placed 40.9cm apart and an object is placed 30.0 cm in front of
A 2.0 m conductor is formed into a square and placed in the horizontal xy-plane. What is the magnetic flux through the conductor
The track near the top of your favorite roller coaster has a circular shape with a diameter of 29 m. What is the speed of the roller coaster
the molar volume of a certain solid is 142 ml at 1 bar and 427.15k its melting temperature. the molar volume of the
a calculate the resistance per unit length of a nichrome wire which has a radius of 0.321 mm. b if a potential
In 0.975 s, a 14.1-kg block is pulled through a distance of 3.32 m on a frictionless horizontal surface, starting from rest. By how much does the spring stretch
Many chemical reactions release energy. Suppose that at the beginning of a reaction, How much electric potential energy was lost in this reaction (in units of eV)
What is acceleration of the elevator
A camera requires 5.2J of energy for a flash lasting 1.0 ms. What power does the flashtube use while it%u2019s flashing
A nozzle is now attached to the end of the hose. If the nozzle diameter is one-third the diameter of the hose, what is the speed of the water leaving the nozzle
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