PLS HELP!!! SCIENCE FINAL AH:( What are the three types of plate
boundaries? Describe their movement and what happens at each boundary.

What are the first three quantum numbers for the electrons located in subshell 2s?

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.

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device