What season starts in the northern hemisphere as the suns direct rays strike the equator moving from the southern hemisphere to the northern hemisphere

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.