Astone falls from a ledge and takes 8 seconds to hit the ground. the stone has an original velocity of 0 m/s. how tall is the ledge? a. 313.6 meters b. 78.4 meters c. 1,254.4 meters d. 39.2 meters

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.