Researchers must utilize a control group in a scientific study because <span>it is important to show that between two groups that were similar from the beginning of the study, the one that received the manipulation is the one that changes. Note that the control group is the group in the experiment that does not receive manipulation by the experimenter and is thus used as basis for how the other test subjects changed. </span>
World war II ended in 1945, it looks like there was a large decline right after in 1946. The cold war began in 1947 until 1991, which is not seen on the graph. But yes, I would say C is the best answer.
A, cant be proven with this graph.
B Nothing about the soviet union on this graph. (unless there is another graph about the soviet union on your quiz?)
D, Wrong because it was at its lowest in 1946 not its highest
The subject of a sentence is the person, place, thing, or idea that is performing the action.
Federal court is the court system that is charged with handiling violations of the US constitution.
Answer:
There is no short answer.
Explanation:
Underdamped motion can be described as the type of motion where if the system is affected by a force, the oscillations of the movement slowly decreases until it reaches to an equilibrium. An example the underdamped motion can be a door that automatically closes with the help of a spring. If underdamped, the door swings back and forth until it stops.
Critically damped motion can be described as where the system does not oscillate and returns to its equilibrium as quickly as possible. Going with the door example, if the system is critically damped, the door closes as soon as it is released and does not move anymore.
Overdamped motion can be described as where the system again does not oscillate and returns to its equilibrium point but does so more slowly than the critically damped system. This time the door closes without swinging but its motion is much slower compared to the previous example.
Resonance can be described as a force or a wave of any kind overlapping with another with the same frequency and therefore amplifies the original amplitude of the force or wave. An example to this concept can be a swing, when pushed at the same frequency, its motion becomes bigger.
