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Question 1: A 1.0-mW laser with a 405-nm wavelength illuminate a sodium target. If 1 in 105 incident photons generate photoelectrons, what is the photocurrent?
Question 2: In an experiment to measure Planck's constant, a metal target is illuminated with ultraviolet light. When the wavelength is 300nm, the measured stopping potential is 1.10 V. When the wavelength is changed to 200 nm, the stopping potential becomes 3.06 V.
(a) what value does this experiment yield for Planck's constants? What is the percent error for the accepted value of h?
(b) Using the experimental value of h, find the threshold frequency and work function for this metal.
A billiard ball moving at 1.5 m/s in the x direction collides with an identical ball initially at rest. after the collison one ball moves off at 45 degrees above the x axis. find both balls post collision velocities
A long, straight wire carries a current of 2.70 A. An electron is traveling in the vicinityof the wire. At the instant when the electron is 4.44 cm from the wire and traveling with a speedof 7.00 104 m/s parallel to the wire inthe direction opposit..
Determine the acceleration of a car which starting from rest reaches a speed of 30 meter per second after 6 seconds
110 grams of boiling water (temperature 100° C, heat capacity 4.20 J/gram/K) are poured into an aluminum pan whose mass is 1000 grams and initial temperature 24° C (the heat capacity of aluminum is 0.9 J/gram/K).
assuming the diameter of a penny is 2.00 cm and its mass is 2.60g what is the minimum air speed needed to lift the
Electrons in a photoelectric-effect experiment emerge from a potassium surface with a maximum kinetic energy of 1.00 eV. What is the wavelength of the light
Suppose that you hear a clap of thunder 18.4 s after seeing the associated lightning stroke. The speed of sound waves in air is 343 m/s and the speed of light in air is 3.00 x10^8 m/s. How long are you from the lightning stroke.
a binary star system consists of two equal mass stars that revolve in circular orbits about there center of mass. the
A small electric car overcomes a 260N friction force when traveling 23km/h. What percent of the input power is used to drive the car
question the tallest spot on earth is mt. everest which is 8857 m above sea level. if the radius of the earth to sea
A glass is half-full of water, with a layer of vegetable oil(n = 1.47) floating on top. A ray of light travelingdownward through the oil is incident on the water at an angle of70.3°. Determine the critical anglefor the oil-water interface.
A model airplane of mass .75 kg is flying at constant speed in ahorizontal circle at one end of a 30m cord and at a height of 18m. What is the acceleration of the plane
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