The setup set up below was used to investigate the reaction between metals and water identify solid x and state its purpose

The reaction q+r2=r2q is found to be first order in r2 and

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?