Vito was having a picnic by a lake with his classmates. he threw a rock into the lake and watched i sink his friend, romeo, threw his apple in the lake and watched it float. what is the best explanation for why the rock sank and the apple floated?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

The grooves or folds of the brain are called

How many liters of oxygen gas, at standard temperature and pressure, will react with 35.8 grams of iron metal? 4 fe (s) + 3 o₂ (g) → 2 fe₂o₃ (s)