Questions

Pass input to XOR and give their outputs to OR gate, if your output is 0 both 8-bit signals are same.

OR

Pass input to XNOR and give their outputs to AND gate, if your output is 1 both 8-bit signals are same. 

The Declaration of Independence express Legal rights of citizens.

In chemistry rusting is called as oxidation. Oxidation is a chemical process where metal gains oxygen and become oxide. In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust.

The rusting of iron is a chemical change because it is two substances reacting together to make a new substance. 

Rusting would only be a physical change if iron molecules remained pure iron throughout the process.

Uttar Pradesh is the most polluted state in India, with 15 of its cities among 30 cities with highest levels of toxic air in the country. Prime Minister Narendra Modi’s constituency Varanasi turned out to be the worst polluted city of UP. Countrywide, it came sixth.

Other towns and cities in UP on the list are Hapur, Bareilly, Firozabad, Kanpur, Agra, NOIDA, Allahabad, and Mathura where PM10 levels were way above permissible limits.

Kerala is the least polluted state in the country, India. In all the 14 districts of the state, NAAQ(National Ambient Air Quality Standards) standards are complied with and had lower concentrations of PM10. However, all the cities surpassed the PM10 standards prescribed by WHO.

The report - Airpocalypse II - is based on air pollution related data collected from Central and State Pollution Control Boards and Committees.

Processes that require or give off heat will be limited to changes of state, known as phase changes, and changes in chemical constitution, or chemical reactions. Changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing.

An exothermic process is one that gives off heat, which is transferred to the surroundings. An endothermic process is a reaction which heat has to be supplied to the system from the surroundings.

Here in all the given options, heat is taken away from them to change there phase. 

Liquid to Solid --- Freezing

Gas to Liquid --- Condensation

Gas to Solid --- Deposition 

are all examples of exothermic processes.

Africa - 54 countries

South America - 12 countries

Antarctica - 0 countries

Europe - 43 countries.

Hence, Antarctica continent has the least countries.