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Distinguish between a ground state for an electron and an excited state. How many visible lines make up the emission spectrum of hydrogen? What are their colors?
The force that a professional boxer''s fist exerts on his opponent''s head is equivalent to being hit with a 5.9kg bowling ball traveling at 8.9m/s that stops in 0.018 s. Determine the average force that the fist exerts on the head.
A small wooden block with mass 0.875kg is suspended from the lower end of a light cord that is 1.80m long. What was the initial speed v0 of the bullet
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 58.7 cm (0.587 m) and the flow speed of the petroleum is 12.7 m/s. At the refinery the petroleum flows at 6.27 m/s.
A 34.7 m long aluminum wire at a temperature of 24.3 oC has a radius of 0.295 mm. what is the resulting current in the wire
a consider an arbitrary electrostatic field configuration. a small test charge is placed at a null point i.e. where e
A cart loaded with bricks has atotal mass of 23.8 kg and is pulled at constant speed by a rope. The rope isinclined at 21.6 ? abovethe horizontal and the cart moves 15.1 m on a horizontal floor.
four protons are placed at the corners of a square of side length a 1.0 angstrom. the square is in the x y quadrant of
A cylinder contains 3.5 {\rm L} of oxygen at350 {\rm K} and 2.4 {\rm atm}. The gas is heated, causing a piston in the cylinder to move outward. The heating reasons the temperature to rise to 610 {\rm K} and the volume of the cylinder to increase to 9..
A series RCL circuit driven at angular frequency w = 780 rad/s has a capacitive reactance XC = 920 ohms, What is the average power consumption of the circuit
When you look at a clock on a space ship zooming by you at a fair fraction of the speed of light, What does the driver of the space ship see
A series LR circuit with L = 20 mH and R = 2.0 k? is connected to a potential source of amplitude 5.0 V and angular frequency 200 rad/s. find the voltage across the resistor and the inductor
The fresh water behind a reservoir dam is 15.0 m deep. A horizontal pipe 2.50 cm in diameter passes through the dam 7.5 m below the water surface, What volume of water flows out of the pipe in 4.0 hours
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