Achef fills a 50ml container with 43.5g of cooking oil. whats the density of the oil

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.

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

Which item is most likely part of the safety contract