Suppose 2 grams of one element, let’s call it x, and 4 grams of another element, let’s call it y, combine to form a compound called xy. that would mean that if there are 10 grams of element x, 10 grams of element y are needed to make the compound xy. true or false?

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

there are no components of a physical goal mentioned on the list of choices that you've provided.

friction

explanation:

they us to move forward and backwards