Which term describes the time it takes for an object to complete one full cycle of

Which is not true about oxygen-17 and oxygen-18?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

It is reasonable to assume that the bulk modulus of blood is about the same as that of water (2.2 gpa). as one goes deeper and deeper in the ocean, the pressure increases by 10000 pa for every meter below the surface. if a diver goes down 80.0 m in the ocean, by how much does each cubic centimeter of her blood change in volume? give the answer in cubic centimeters (actually one cubic centimeter equals one milliliter).