Calculate the acceleration of a bus that speed up from 20ms-1 to 40ms-1 in 8 seconds?

Which feature indicates that mars resides in the inner region of the solar system

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.