2. Which of the following is the best example of a closed system? (2 points)
O
An unsealed beaker
O
Our universe
O
A sealed glass flask
O
An insulated gas cylinder

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:

how to make a simple air condition

the answer is b. dilution