Ex. 48 : At what temperature will helium molecules have the same R.M.S. velocity as that of hydrogen at N.T.P. ? (M = 4, My = 2)
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- A hypothetical speed distribution of gas molecules is defined as follows: P(v) = 0 for 0≤v < vo P(v) = 0.21 for vo ≤ v << 2vo P(v) = 0 for 2v0 < v where P(v) is the probability distribution as a function of speed, v. a) Use the normalisation condition to find the value of v. b) What percentage of the gas molecules has its speed between vo and/vo? c) What percentage of the gas molecules has its speed between 0 and 2 ?Helium atoms interact very weakly with each other; helium only liquefies at 4.2 K at standardpressure. What is the kinetic energy of a helium atom:(a) at 100. K?(b) at 10.0 K?In the question its asks for the rate of energy transfer P after you find what the interface temperature T is. Upon completion from submitting T in into the intial rate equation the final expansion gives: P = A(Th - Tc) / (L1/ k1) + (L2/ k2) I understand how T was achieved from expanding the P1 = P2 substitution, but how is P found from inserting T into P1 = k1A (T - Tc / L1)?
- The total power emitted by a spherical black body of radius Rat a temperature T is P,. R Let P, be the total power emitted by another spherical black body of radius kept at 2 temperature 27T . The ratio, is (Give your answer upto two decimal places) P2Much of the gas near the Sun is atomic hydrogen. Its temperature would have to be 1.50 107 K for the average speed vrms to equal the escape speed of the Sun. What is that speed? The atomic mass of hydrogen is 1.008 10-3 kg/mol.How does the density of He-gas at 22C compare to the density of air at 22C? (He=5 g/mol)
- Hi I need help with this question: The Goodyear blimp we usually see hovering above our heads at a football game contains 5200 m3 of helium gas. If there are 1090 kg of gas at an absolute pressure of 1.10 105 Pa in the blimp, what is the temperature of the gas? The atomic mass of helium 4.00260 g/mol.The mass of a helium atom is 6.650e–27 kg. What is the average speed of a helium molecule in a monoatomic gas at a temperature of 77 C?The sun can be modeled as a blackbody emitting at a temperature of 5800.0 Kelvin. Determine the following: a) The blackbody emissive power of the sun. b) The fraction of the sun’s emission in the visible range (0.40μm – 0.70μm).
- My Dyson vacuum cleaner can achieve a pressure as low as 10−8 Pa at 25C. How many molecules are there in a cubic centimeter at this pressure and temperature?The temperature inside a supernova explosion is said to be 2.00×1013 K . (a) What would the average velocity vrms of hydrogen atoms be?(b) What is unreasonable about this velocity? (c) Which premise or assumption is responsible?2 Thermo Physics The ground state of Cyanogen gas (Energy = 0 eV) and 1st excited state is (E = 4.7x10^-4eV) can be separately identified by their spectra. An astronomer determines that on interstellar gas has a ratio of 10:1. 10 molecules of cyanogen gas to every 1 excited state. Use this to determine the temperature of the gas?