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In the Bohr model of the hydrogen atom, an electron in the 1st excited state moves at a speed of 2.19 *10^6 m/s in a circular path having a radius of 5.29*10^-11 m. What is the effective current associated with this orbiting electron?
q1. an airplane flies 200 km due west from city a to city b and then 315 km in the direction of 33.0deg north of west
A solid cylinder of mass 148.7 kg and diameter 0.72m has mounted to rotate around its axis, the cylinder has an initial angular velocity of wi, and the mass is 26m below the cylinder
A 5.5 ohm resistor, a 11.3 ohm resistor and a 11 ohm resistor are connected in series with a 36 V battery. If the resistors are instead connected in parallel across the battery, what is the equivalent resistance
q1.a race car starts from rest on a circular track of radius 453 m. the cars speed increases at the constant rate of
A 50.0 g copper calorimeter contains 200 g of water at 20.0°C. How much steam must be condensed into the water if the final temperature of the system
a wheel 2cm wide with a 3.5cm radius is being spun at a constant velocity "w" by a static force "F", how much work is being 'lost' through the bar
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 460 lines/mm , and the light is observed on a screen 1.7 m b..
When monochromatic light is being used with a certain diffraction grating, it is found that the first-order maximum occurs at 8°. What is the highest order of maximum that can be observed
The average speed of a nitrogen molecule in air is about 6.70 * 10^2 m/s, and its mass is about 4.68 * 10^-26 kg. What average force does the molecule exert on the wall
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. find the temperature of the inner surface of the bottom of the pot
A bug is hovering in the air (v=0) when a heavy automobile, moving at 20 m/s, suddenly collides with it. what is the bug's speed after the collision
Spherical mirror has a focal length of 10 cm. find location and then describe image for an object distance of 25 cm. How fast does the image of the object move
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