17. The SI unit for force is N.
18. When an Unbalanced force acts upon and object, the object will change speed and/or direction of motion.
19. Average speed is the speed averaged over a span of time. Instantaneous speed would be the speed at any given instance during that span of time.
20. Acceleration= (final velocity - initial velocity) / time
Final velocity= 0 m/s
Initial velocity= 25 m/s
Time = 40 sec.
So, acceleration (0 - 25) m/s / 40 sec.
Acceleration = -0.625 m/s^2
Answer: The food
Explanation: the independent variable is the one to be changed and in this case, it is the food
Actually the sun does change, you are comparing whether the mold will grow faster with and without the sun. so the answer would be the bread, the bread doestn change.
Tough outer coating; organelles are responsible for functions inside a cell.