In a laboratory experiment, john uses a mesh to separate soil particles from water. what technique of separation is he using? chromatography distillation filtration fragmentation condensation

What is the chemical formula for the compound formed between sodium and flour one

The footprints of a dinosaur and the burrow of an ancient shrimp are examples of which kind of fossils

Ariver current has a velocity of 5km/h relative to the shore, and a boat moves in the same direction as the current at 5 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?