How many years does one month symbolize on the cosmic calendar

Gunpowder residue is most likely to show up where on a shooters hands

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?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine