Which describes the amplitude of a wave when it carries more energy? It is higher.
It is lower.
It is darker.
It is lighter.

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.