Wave A is being decreased in temperature, and Wave B is moving from a liquid to a gas medium. Which statement can be made about both waves?

They will speed up.

They will increase the density of their medium.

They will slow down.

They will decrease the density of their medium.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

k2s for potassium sulphide