Calculate the mass of copper
contained in 400000 tonnes of
Cufes2

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

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

How does the atmosphere to make earth livable? check all that apply. causes the seasons contains oxygen provides warmth creates important nutrients blocks harmful energy from the sun plz like !