C. The Independent variable
It is the variable that you manipulate, while dependent is the response.
E. Nonsense longitudinal waves have all of these properties
Answer:

Explanation:
The Work-Energy Theorem is applied herein:

The number of turns needed to stop the grindstone is:

![n = \frac{(15\,kg)\cdot (0.186\,m)^{2}\cdot [(1.83\,\frac{rev}{min} )\cdot (\frac{2\pi\,rad}{1\,rev} )\cdot (\frac{1\,min}{60\,s} )]^{2}}{4\cdot (0.80)\cdot (8.82\,N)\cdot(0.186\,m)\cdot 2\pi}](https://tex.z-dn.net/?f=n%20%3D%20%5Cfrac%7B%2815%5C%2Ckg%29%5Ccdot%20%280.186%5C%2Cm%29%5E%7B2%7D%5Ccdot%20%5B%281.83%5C%2C%5Cfrac%7Brev%7D%7Bmin%7D%20%29%5Ccdot%20%28%5Cfrac%7B2%5Cpi%5C%2Crad%7D%7B1%5C%2Crev%7D%20%29%5Ccdot%20%28%5Cfrac%7B1%5C%2Cmin%7D%7B60%5C%2Cs%7D%20%29%5D%5E%7B2%7D%7D%7B4%5Ccdot%20%280.80%29%5Ccdot%20%288.82%5C%2CN%29%5Ccdot%280.186%5C%2Cm%29%5Ccdot%202%5Cpi%7D)

Answer:
It would be a straight line
Explanation:
On a distance-time graph, an object that moves at constant speed would be represented by a straight line.
In fact, in a distance-time graph, the slope of the line corresponds to the speed of the object. We can demonstrate that. In fact:
- The speed of the object is equal to the ratio between the distance covered
and the time taken (
):

On a distance-time graph, the distance is on the y-axis while the time is on the x-axis. The slope of the line is defined as:

But the variation on the y-axis (
) is equal to the distance covered (
), while the variation on the x-axis
corresponds to the time taken (
), so the slope can also be rewritten as

which is equal to the speed of the object. Therefore, an object moving at constant speed would be represented by a line with constant slope, which means a straight line.