Varför har salt en högre smältpunkt än socker?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

What is the standard unit of measure for acceleration?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.