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when c=4 what is the value of the expression 72/c?

1.In which temperature of water did the food coloring diffuse faster? 2.Using your knowledge of the motion of molecules, explain the results. I need help on a discussion.

A 100-N force is used to push a 15 kg carton 5 meters along the sidewalk. How much work was done? *

Delia's relative long jump length was recorded as 0. what does this mean?