A subwoofer is a type of speaker which plays only the very low notes in a song or movie, which following frequencies would you expect to be able to hear from a subwoofer 10hz
25hz
750hz
1,050hz

Natural forces that can alter ecosystems include seasons and climate changes. t or f

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

The ozone hole appears in antarctica during