Select the word from the list that best fits the definition what wavelength measures. depth distance energy speed time volume

Which of there factors contributed most to us westward expansion in the second half of the nineteenth century?

Can someone list any possible solutions to air pollution ?

Sarah is making a scale drawing of a painting that is 48inches wide by 120 inches high her paper is 12 inches wide and 24 inches tall she decides to use a scale 1 inches equals 4 inches is this a reasonable scale