Awater reclamation plant turns sewage water directly into drinking water.
a. true
b. false

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Which of the following is true about the speed of light? it depends on the wavelength.

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?