Robert has a very detailed model of the solar system where each planet is made out of granite rock. since his little sister really liked the model, he spent two weeks in his dad's workshop building her a styrofoam copy. when he picked up the models to take them back inside the house, which physical property would he immediately notice upon picking them up?

Which statements are true about electrolysis? check all that apply. electrolysis requires an acid be present. electrolysis is described by two half-reactions. electrolysis is not an industrial process. electrolysis results in commercially valuable products. electrolysis involves the transfer of electrons. reduction results in the loss of electrons. oxidation results in the loss of electrons.

Drive down any three characteristic of modern periodic table

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?