What function does the skull serve for the skeleton?

a.
movement

b.
protection

c.
support

d.
height

What is the relation between concentration of reactants and the rate of chemical reaction?

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

What happens to isotopes that are unstable?