I put a hard boiled egg into a jar of vinegar for 3 days. This was my result. Is the change chemical or physical?

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line