Physics, 30.08.2019 22:30 hidalgo8429
In a gas at (absolute) temperature t, the molecules have a typical kinetic energy of 3kbt/2, where kb is boltzmann’s constant.
derive an expression for the thermal debroglie wavelength, a typical value for the debroglie wavelength λ of a molecule in the gas.
for helium atoms, calculate the debroglie wavelength at room temperature and at the boiling point of helium, and compare each number with the typical distance between the particles in each state.
comment on when we will need to use quantum mechanics in understanding the behavior of helium.
Answers: 2
Physics, 22.06.2019 07:00, Angelanova69134
Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j
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Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?
Answers: 3
Physics, 23.06.2019 00:30, cr22estiles
Why is no-till farming more sustainable than many traditional methods of farming
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In a gas at (absolute) temperature t, the molecules have a typical kinetic energy of 3kbt/2, where k...
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