Someone help Its a Friday night and i have no idea what this answer for my hmw is

Average speed is described as .

A) speed that does not change

B) speed that does not always move at the same rate

C) speed that decreases

D) none of these

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .