In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using? Which quantity is a vector quantity?

A. chromatography
B. distillation
C. filtration
D. fragmentation
E. condensation

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

Which sentences describe point source pollution? in this type of pollution, the source of the pollution is single and easily identifiable. when runoff water from the melting of snow mixes with debris, it creates pollution. the runoff water, mixed with pollutants, reaches large areas with disastrous effects. alternatively, when a wastewater treatment plant releases harmful chemicals into a stream, the chemicals pollute the stream water because they are not treated for safety.

Substances that assume the shape of their container, but do not have a definite size are called