Base your answers on the following four graphs, which represent the relationship between speed and time for four different objects, a, b, c, and d moving, in a straight line

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults