A flask has volume of 200 cm3. when full of air the flask has mass of 30.98g the flask is connected to a vaccum pump the air is pumped out and tap is closed the flask has now mass og 30.72g
calculate
a) the mass of air in flask before connecting to vaccum pipe
b) the density of air in flask
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The root hairs are suited for absorbing water from the soil because: The root hairs present a large surface area. The more the surface area, the greater is the absorption. ... It contains a solution (cell sap) of a higher concentration than surrounding soil water.
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this is form kinematics concept
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