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If the electric charge did not exist and electrons were bound to protons by the gravitational force to form hydrogen, derive the corresponding expressions for ao and En and compute the energy and frequency of the light emitted in the n=2 to n=1 transition. Compare these quantities with those of real hydrogen and comment.
A force of 10N acts on a 5Kg mass for a shot 0.5s duration. What is the resulting velocity of the mass if it started with no velocity
Water at a pressure of 13 atm, at street level, flows into a building at 3m/s through a 6 cm diameter pipe. The pipe tapers down to a 2 cm diameter by the top floor 50 m above. The density of water is 1,000 kg/m^3. Calculate the water pressure and ve..
The tube of a mercury thermometer has an inside diameter of 0.142 mm. The bulb has a volume of 0.242 cm^3. How far will the thread of mercury move when the temperature changes from 12.1 degrees C to 30.9degrees C
What is the temperature of a sample of gas, when the average translational kinetic energy of a molecule in the sample is 8.01 × 10-21 J? What is the total translational kinetic energy, in kilojoules, of all the molecules of this sample, when it conta..
A 80 g, 33-{rm cm}-long rod hangs vertically on a frictionless, horizontal axle passing by its center. A 11 g ball of clay traveling horizontally at 2.5 m/s hits and sticks to the very bottom tip of the rod.
In a popular amusement park ride, a rotating cylinder of radius3.00 m is set in rotation at anangular speed of 6.00 rad/s, as inFigure P7.51. The floor then drops away, leaving the riders suspended against the wall in a vertical position. What min..
An Escort and a Camaro traveling at right angles collide and stick together. What was the speed of the Camaro
Tritium has a half-life of 12.3 y and can also be used to date organic matter. If the activity of tritium is determined to be 3% of the expected activity, what is the age of the sample
A visible disturbance propagates around a crowded soccer stadium when fans, section by section, jump up and then sit back down
the displacement in meters of a particle moving in a straight line is given by s t2 - 8t 18 where is measured in
Two sleds are hooked together in tandem . The front sled is is twice as massive as the rear sled. Determine the ratio of the magnitude of the two forces.
A 27 year-old biologist makes a trip to study lifeforms in a distant planet 17 light-years away. How old is she when she returns according to her clock
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