How are continental drift and plate tectonics related

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?