Consider an electron, mass m = 0.9 X 10-30 kg, in aninfinite well that is 2 cm wide. For what value of n willthe electron have an energy of 1ev?
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An electron and a proton each have a thermal kinetic energy of3kBT/2. Calculate the de Broglie wavelength of each particle at atemperature of 2040 K. (kB is Boltzmann's constant, 1.38รย10-23 J/K.The mass of the electron is 9.11รย10-31 kg and the mass of theproton is 1.67รย10-27 kg.)Wavelength of the electron =Wavelength of the proton =
The mass of an electron is 9.11 x 10-31 kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31 x 10-10 m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00 x 108 m/s.
A slinky has a mass of 0.28 kg and negligible length. When itisstretched 1.8 m, it is found thattransverse waves travel thelength of the slinky in 0.72 s. (The Slinky stretches like an idealspring,and propagates transverse waves like a rope with variabletension.)
(a) What is the force constant, k, oftheslinky?1 N/m(b) If the slinky is stretched less, willthe time required for awave to travel the length of the slinkyincrease, decrease, or staythe same?2---Select---increasedecreasestay the sameExplain.3(c) If the slinky is stretched 0.9 m, howmuch time does it take awave to travel the length of theSlinky?4 s