Which of the following is a common property or characteristic of a base? a. sour taste b. corrosive to skin, clothing, and other substances c. increases the hydrogen ion concentration of a solution d. slippery feel

Which of the following statements is true? a. most heat energy is easily recovered and used for useful actions. b. friction causes molecules to vibrate more slowly. burning air and gasoline in an c. engine changes chemical energy into mechanical energy. it is impossible to d. change mechanical energy into mechanical energy.