List some ways you can separate a mixture into different substances? example: i have a bag of iron filings and sand how do i separate them?

What is the formula for the molecular compound nitrogen monoxide

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

What term describes technology that operates on an atomic level