An apple weighs 0.25 lb. Which of the following expressions converts this mass to kg?
1 lb =454 g

Which of these conditions most likely produces an unstable isotope?

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude