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When an electron in a hydrogen atom falls from a higher energy state down to the ground state, the atom emits a photon with the momentum whose magnitude is 5.452 x 10^-27 kg*m/s. What is the quantum number of the level from which the electron fell?
For lead 82Pb207 (atomic mass = 206.975880 u) obtain the mass defect in atomic mass units,
Water flowings through a 2.1 cm diameter pipe can fill a 400 L bathtub in 5.2 min. What is the speed of the water in the pipe
Calculate torques about an axis
the cube of insulating material has the one corner at the origen . each side of the cube has length 0.250m so the top face of the cube is parallel to the xz-plane and is at y=.250m, calculated the net charge enclosed by the cube
Type your question hereA bullet (m = 0.0210 kg) is fired with a speed of 92.00 m/s and hits a block (M = 2.60 kg) supported by two light strings as shown, Find the height to which the block rises
A traveling sinusoidal electromagnetic wave in vacuum has an electric field amplitude of 57.1 V/m. Find the intensity of this wave and calculate the energy flowing during 16.9 s through an area of 0.0217 m2
A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving.
Two workers are trying to move a heavy crate. One pushes on the crate with a force , which has a magnitude of 485 newtons and is directed due west.
An aerosol can of whipped cream is pressurized at 440kPa when it's refrigerated at 3 C. The can warns against temperature in excess of 50 C. What is the safest pressure for the can .
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
Three blocks, each of mass 9 kg are on a frictionless table. A hand pushes on the left most box (A) such that the three boxes accelerate in the positive horizontal direction, What is the magnitude of the force on block A from the hand
How many revolutions will the car have gone through.
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