Is crumbling sheet of paper physical or chemical change and why! Pls help fast :((

When will le chatelier's principle come into effect? at the beginning of a reaction, when there are only reactants when a reaction has reached chemical equilibrium when a catalyst is added to a reaction mixture when a reaction is occurring but not yet at equilibrium

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

How do scientists think that gravity affected the formation of our solar system?