Questions

XPath is an expressions to select a xml node in an XML document.

It allows the navigation on the XML document to the straight to the element where we need to reach and access the attributes.

The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.

Sevagram

According to the Mercer’s 19th annual Quality of Living survey released Hyderabad emerged as the best city in terms of living standards among Indian cities for the third year in a row.

Geysers are fountains of hot water and superheated steam that erupts with an explosion whereas hotsprings or thermal springs are found where water sinks deep enough the surface to be heated up by the interior forces and it comes out without any explosion. Iceland and New Zealand are the other countries having geysers while hot springs are relatively common.

ECHO.

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.

Photosynthesis can be represented using a chemical equation.

The overall balanced equation is

              $$\begin{gathered} 6CO2 + 6H2O →Sunlight C6H12O6 + 6O2 \\ Source of Carbon & Oxygen + \\ Source of Electrons & Hydrogen + \\ Energy that drives Photosynthesis ----> \\ Sugar + Gas produced by splitting water. \end{gathered}$$

Where 

CO2 = carbon dioxide 

H2O = water

C6H12O6 = glucose 

O2 = oxygen.