Aspeedometer show the what speed of a vehicle

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.

Complete each row of the table below by filling in the missing prefix or missing exponent.

What conclusion can you draw from this experiment about the components of the black ink?