Practice Exercise. What must the kinetic energy of a helium atom with a mass of 6.65...
A gas of helium atoms (each of mass 6.65×10−27kg) is at room temperature of 7.1°C. What is the de Broglie wavelength of the helium atoms that are moving at the root-mean-square speed?
What is the de Broglie wavelength of a He atom with a kinetic energy of 0.025 eV? What is the de Broglie wavelength of an electron with the same kinetic energy?
please show all work 9) Calculate the kinetic energy in eV) of a nonrelativistic neutron that has a de Broglie wavelength of 9.9 * 10-12 m. (h-6.626 x 10-34 J·s, mneutron - 1.675 x 10-27 kg, 1 eV = 1.60 10-191)
Calculate the de Broglie wavelength in meters of a tennis ball with a mass of 9.00 x 102 kg that has a kinetic energy of 6.53 x 107 J. (Answer. 1.93 x 10-7 m)
12. What is the average kinetic energy per molecule of a diaatomic gas at 10°c? 13. What is the rms speed of the molecules of helium gas at 25°C. Helium is a monoatomic gas Mass of He atom 6.65 x 1027Kg
2. Consider a sample of helium gas at room temperature. (a) What is the average kinetic energy of an atom of helium in the gas sample? (b) What is the rms speed for the atoms? 3. A beaker with negligible mass contains 0.50 kg of water at a temperature of 800 C. How many grams of ice at a temperature of -20° C must be dropped in the waters temperature of the system is 30° C? (Cice 2010J/(kg C), Cwater...
Alpha particles have a mass of mα=6.64×10−27 kg.mα=6.64×10−27 kg. Calculate the de Broglie wavelength λ1λ1 of an alpha particle that has a kinetic energy of K1=1.30×10−13 J.
Calculate the,energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 4 to n = 1. energy emitted: 2.71 x10-19 J Assuming that the smallest measurable wavelength in an experiment is 0.330 fm, what is the maximum mass of an object traveling at 885 m s for which the de Broglie wavelength is observable? kg m=
A particle has a de Broglie wavelength of 2.1 x 10-1°m. Then its kinetic energy increases by a factor of 3. What is the particle's new de Broglie wavelength, assuming that relativistic effects can be ignored? Number 1.62e-10 unitsym the tolerance is +/-2%
( ulat will eject electrons (i.e. the kinetic energy of the electrons after ejection is equal zero)? 4 (3pt) Calculate the de Broglie wavelength for the following: a. An electron moving at 5.31 x 106 m/s. b. A baseball thrown at a speed of 97 mph. The mass of this baseball is approximately 145 grams. c. A 175 lbs human being running at a speed of 2.2 km/hr. d. How does the de Broglie wavelength of the electron differ from...