Physics, 25.09.2021 21:20, elishane864
Problem 2. A sodium photoelectric surface with work function 2.3eV is illuminated and emits electrons. The electrons travel toward a negatively charged cathode and complete a circuit. The potential difference supplied by the power supply is increased, and when it reaches 4.5V, no electrons reach the cathode. a) For the electrons emitted from the sodium surface, calculate the following. i. The maximum kinetic energy ii. The electron speed at this maximum kinetic energy b) Calculate the wavelength of the radiation that is incident on the sodium surface. c) Calculate the minimum frequency of light that will cause photoemission from this sodium surface.
Answers: 2
Physics, 21.06.2019 22:00, westes0376
Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?
Answers: 3
Physics, 21.06.2019 22:30, nolandh7940
The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
Answers: 1
Physics, 22.06.2019 00:00, raeganwelch
Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.
Answers: 2
Problem 2. A sodium photoelectric surface with work function 2.3eV is illuminated and emits electron...
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