Examples of chemical changes in digestion ,1.Stomach acids breaking down food 2.Tongue rolling food into bolus
3. Saliva breaking down sugar in foods
4.Stomach juices dissolving fats
5.Tongue pushing food down esophagus.

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

just did the assignment and the answer was #1 +2 n

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.