How do you translate 4.52*10^3 into standard notation maintaining the same number of significant figures?

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.