Athermopane window consists of two sheets of glass each 10 mm thick, separated by a layer of stagnant air 6 mm thick. find the percentage reduction in heat loss from this pane as compared to that of a single sheet of glass 10 mm thickness. the temperature drop between inside and outside remains same at 25"c. thermal conductivity of glass is 40 times that of air. a) 86.15% b) 96.15% c) 56.15% d) 76.15%

Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.

The answer to the question: choose the correct statement.  a) when ethane reacts with fluorine gas the product is less stable.b) addition reactions of unsaturated hydrocarbons and halogens requires a high activation energy.  c)the double covalent bond within unsaturated hydrocarbons requires a lot of energy to break.  d)the double covalent bond within unsaturated hydrocarbons can be broken easily.is: a) when ethane reacts with fluorine gas the product is less stable.

Hey : )a transition from the first energy level to the fourth energy level