How long would it take for a 20 gram sample of phosphorus-32 to decay to 5 grams? Can you show the work as well I'm very confused?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean

Compare and contrast physical changes with chemical changes.