C3h8 + o2 yields co2 + h2o with balancing a chemical equation. need before tomorrow.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.

Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)