What is the name of the compound that occurs when Lead (IV) and Phosphate combine?

Which answer lists the fundamental forces in order from strongest to weakest

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

Light waves travel than sound waves.