How is the form of energy being changed when a student uses an electric sharpener to sharpen a pencil? from electrical to mechanical

from magnetic to electrical

from mechanical to electrical

from thermal to mechanical

If a || b and e || f, what is the value of y ?

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

Which proportionality applies to avogadro’s law?