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In rotatory motion, linear velocities of all the particles of the body are

If a 0.24 g sample is burnt in air to produce 0.22 g of CO₂, what is the percent carbon in the sample ?

Two plants can be conclusively said to belong to the same species if they

To an astronaut in a spaceship the sky appears black due to

In angiosperm, characters of flowers are used in classification because