When sunlight passes through our home’s window, the dust particles move in a light path of the light visible. Why the dust particles move in light rays?
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A. Oxygen B. Hydrogen sulphide C. Carbon dioxide D. Nitrogen
explain with example mass number. where we use mass numbers and how to identify them?
[A] Ketones [B] Esters [C] Aldehydes [D] Alkynes
World Environment Day is celebrated on ….. A) February 7 B) April 19 C) June 5 D) October 22
[A] Selenium [B] Tellurium [C] Neon [D] Krypton
explain with examples the different components of environment
[A] Bladder [B] Stomach [C] Small Intestine [D] Large Intestine
Why is a demultiplexer called a data distributor?
[A] Epethelial cells [B] Pancreatic cells [C] Nerve cells [D] Epidermal cells
explain the theory of plate tectonics. Who proposed the theory and when?
