For physics

the graph shows the motion of an object traveling in a straight line as a function of time. what is the average speed of the object during the first two seconds?
a. 5m/s
b. 2.5m/s
c. 10m/s
d. 20m/s

see picture above

A. 5 m/s

Explanation:

From the graph, for the first 2 seconds, the graph is a straight line meaning that the slope is a constant.

Average speed of an object is the rate of change of position. Here, the position of the object changes from 0 m to 10 m for a time interval of 2 seconds.

The change in position () and time interval () are given as:

Therefore, the average speed () is given as the ratio of the total change in position and the time interval for the change.

Hence, the average speed is 5 m/s.

d. air pressure decreases as altitude increases.

3. dark matter

empty space could also be a simple vacuum