Acylinder of oxygen gas is cooled from 300k to 150k by what factor does the average kinetic energy of the oxygen molecules in the cylinder decrease

The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

where,

K = Average kinetic energy

R = Gas constant

T = Temperature of the system

= Avogadro's number

Average kinetic energy of oxygen gas molecule at 300 K.

..[1]

Average kinetic energy of oxygen gas molecule at 150 K.

..[2]

[1] ÷ [2]

The factor by which the average kinetic energy of the oxygen molecules in the cylinder decreases is '0.5'.

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.