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1. Ultraviolet light of wavelength 280 nm is used in an experiment on photoelectric effect with lithium (c = 2.5 eV) cathode. Find (a) the maximum kinetic energy of the photoelectrons and (b) the stopping potential.
2. Consider an X-ray beam, with λ = 1.00 A° and also a y-ray beam from a Cs sample, with λ = 1.88 x 10-2 A°. If the radiation scattered from free electrons is viewed at 90° to the incident beam:
(a) what is the Compton wavelength shift in each case?
(b) What kinetic energy is given to recoiling electron in each case?
(c) What percentage of the incident photon energy is lost in the collision in each case?
3. Find the amplitude A in the wave function for the infinite potential well. Determine the probability of finding a particle of mass m between x = 0 and x = a/10 if it is in the n = 4 state.
4. Use a computer program or Mathematica to calculate values En, Ψn Ψn2 for an electron in an infinite potential well with a = 10 A° and a = 20 A°. Plot separately, to scale Ψn Ψn2 for n=1 to 6.
Four objects are situated along the x axis as follows: a 1.70kg object is at -0.9m, a 1.60kg object is at 0.2m, a 2.4-kg object is at the origin, and a 2.50kg object is at -1.10m.
An energy of 28.0 eV is required to ionize a molecule of the gas inside a Geiger tube, What maximum number of ion pairs can it create
The radial acceleration of the tip of the second hand of a clock is .0033 m/sec2. What is the lenght of the second hand of this clock?
A two-slit pattern is viewed on a screen 1.04 m from the slits. what is the total width of the central bright fringe?
A box is dropped from a spacecraft moving horizontally at 27.0 m/s at a distance of 155 m above the surface of a moon. The rate of freefall acceleration on this airless moon is 2.79 m/s2.
The position vector of a 1.0-kg particle is given by r = 3 i + 2 j + 5 k and its velocity by v = 8 i - 2 k. Find the magnitude of the particle's angular momentum in kg.m2/s
Find the maximum rms current allowed in the primary circuit.
A car of mass M = 1200 kg traveling at 45.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires.
If the rms electric field of this light is 18.0N/C at a distance of 1.50m from the bulb, what is the average total power radiated by the bulb
The frequency of light reaching Earth from a particular galaxy is 16% lower than the frequency the light had when it was emitted. What is the speed of this galaxy relative to the Earth
A professor's office door is 0.80 wide, 3.0 high, and 5.0 thick; has the mass of 25; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of door frame.
Your cell phone typically consumes about 440 mW of power when you text a friend. what is the current flowing through the cell-phone circuitry under these circumstances
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