Two gas cylinders are identical. one contains the monatomic gas argon (ar), and the other contains an equal mass of the monatomic gas krypton (kr). the pressures in the cylinders are the same, but the temperatures are different. determine the ratio of the average kinetic energy of a krypton atom to the average kinetic energy of an argon atom.

The consumption of fossil fuels could be

Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.