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what energy goes into a popsicle stick catapult

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

Why do electron microscopes have higher resolving power than light microscopes?

Which is not true about oxygen-17 and oxygen-18?