9.Which part of the conductivity apparatus should you never touch

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

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.

What is another way to determine mass times acceleration?