Answer:
Ehrich Weiss (better known as escapologist Harry Houdini), made Australia's first recognised flight in a Voisin biplane at Diggers Rest, Victoria, 18 March 1910.
Explanation:
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Answer:
Some of the key characteristics of CBDs include:
High concentration of offices, banks, financial institutions, and so on.
High density and high-rise buildings.
High land values.
Lack of open and/or green space.
Department stores and high-end shops.
Multi-storey car parks.
Explanation:
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Answer:
The main objective is to maintain "peace, harmony among the nations."
Explanation:
Some objectives of the United Nations are International peace and security should be maintained. Friendly relations between different nations on the terms of equality and also the principle of self determination should be developed. To foster worldwide cooperation so as to solve the economic, social, cultural as well as humanitarian problems. These things will certainly help to maintain the harmony as well as peace among all. It also works on the problems or the situation which arises and can often lead to the international friction.
A primary pollutant is an air pollutant emitted directly from a source.
A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.
Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and <em><u>acid rain</u></em>, which is formed when sulfur dioxide or nitrogen oxides react with water.
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