What is the function of tendons?

Compare and contrast physical changes with chemical changes.

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?