The diagram below represents two cells next to a metric measuring device under the low power objective of a compound light microscope what is the approximate length of a nucleus of one of these cells

Acompound is found to contain 6.1% hydrogen and 93.9% oxygen. find it’s empirical formula.

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 a large body of water, such as the ocean, influence climate?