a 100 g sample of a compound is composed of 26.5 g of potassium, 35.4 g of chromium and 38.1 g. what is the empirical formula

Light waves can move through , but they travel fastest when they move through a(n) .

Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.

Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.