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(a) A hydrogen atom has its electron in the n = 2 level. The radius of the electron's orbit in the Bohr model is 0.212 nm. Find the de Broglie wavelength of the electron under these circumstances. (in m)
(b) What is the momentum, mv, of the electron in its orbit? (in kg-m/s)
The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 950 ohm resistor in series with the deflection plates.
A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a tightly wound inner core. what is the angular speed of the spool
A proton, an electron and an a particle, accelerated through the same potential difference enter a region of uniform magnetic field, moving at right angles to B. what are the radii of the proton and the a-particle path
A fluid with viscosity n flows through a tube of radius R and length L. What must be the radius of the second tube so that both fluids have the same volume flow rate
A light source emits two spectral lines: one at 552 nm and one at 642 nm. If the spectrum is observed using a diffraction grating with 445 line/mm and vied on a screen 2.0 m away, what is the distance between the two spectral lines in the first or..
A concave mirror (f = 35cm) produces an image whose distance from the mirror is one-fourth the object distance. Decide the object distance. Decide the (positive) image distance.
The current in the figure below is 0.53 A. (Let the internal resistance of battery 1 be r1 = 1.4 Ω and the internal resistance of battery 2 be r2 = 1.3 Ω.), Find the voltage drop Vab.
A transverse wave travels on a string of length 1.3 m and diameter 1.1 mm, What is the linear mass density of the string
A small turtle moves at a speed of 165 furlongs per fortnight. Find out the speed of the turtle in centimeters per second. Note that 1 furlong = 220 yards and 1 fortnight = 14 days.
Earthquakes are basically sound waves (seismic waves) traveling through the earth. Because the earth is solid, it can support both “P waves” (longitudinal) and “S waves” (transverse). The P waves travel at 8000m/s, while S waves are slower, only 4500..
A 67.0-kg climber is scaling the vertical wall of a mountain. How much is the rope stretched
A hockey puck with an intial velocity of 15 m/s slides 73 m before coming to rest. How long does it take for the puck to stop
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