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The tree which sends down roots from its branches to the soil is known as:
The type of glass used in making lenses and prisms is
The unit of measurement of noise is
The Unit of plank’s constant is -
The unit of radioactivity is
The unit to measure the flow of water is
The universal law of gravitation was propounded by
The untreated paper falls in the following class of insulation
The use of Heat treatment of ore that includes smelting and roasting is termed as
The variety of coal in which the deposit contains recognizable traces of the original plant material is