Thorium-234 has a half-life of roughly 24 days. If you have a 500 g sample of thorium-234, how much will be left after 48 days?

Why do carbohydrate molecules function so well as fuel for the body?

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity