The answer to your question is,
negative to positive
-Mabel <3
Answer:
The net force acting on an object is proportional to the acceleration of that object with respect to an inertial frame of reference. The constant of proportionality in this, Newton's second law, is the classical mass of the object.
Explanation:
Answer:
The sound intensity of train is 1000 times greater than that of the library.
Explanation:
We have expression for sound intensity level,
![L=10log_{10}\left ( \frac{I}{I_0}\right )](https://tex.z-dn.net/?f=L%3D10log_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI%7D%7BI_0%7D%5Cright%20%29)
A train whistle has a sound intensity level of 70 dB
We have
![70=10log_{10}\left ( \frac{I_1}{I_0}\right )](https://tex.z-dn.net/?f=70%3D10log_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI_1%7D%7BI_0%7D%5Cright%20%29)
A library has a sound intensity level of about 40 dB
We also have
![40=10log_{10}\left ( \frac{I_2}{I_0}\right )](https://tex.z-dn.net/?f=40%3D10log_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI_2%7D%7BI_0%7D%5Cright%20%29)
Dividing both equations
![\frac{70}{40}=\frac{10log_{10}\left ( \frac{I_1}{I_0}\right )}{10log_{10}\left ( \frac{I_2}{I_0}\right )}\\\\\frac{7}{4}=\frac{log_{10}\left ( \frac{I_1}{I_0}\right )}{log_{10}\left ( \frac{I_2}{I_0}\right )}\\\\10^7\frac{I_2}{I_0}=10^4\frac{I_1}{I_0}\\\\\frac{I_1}{I_2}=10^3=1000](https://tex.z-dn.net/?f=%5Cfrac%7B70%7D%7B40%7D%3D%5Cfrac%7B10log_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI_1%7D%7BI_0%7D%5Cright%20%29%7D%7B10log_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI_2%7D%7BI_0%7D%5Cright%20%29%7D%5C%5C%5C%5C%5Cfrac%7B7%7D%7B4%7D%3D%5Cfrac%7Blog_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI_1%7D%7BI_0%7D%5Cright%20%29%7D%7Blog_%7B10%7D%5Cleft%20%28%20%5Cfrac%7BI_2%7D%7BI_0%7D%5Cright%20%29%7D%5C%5C%5C%5C10%5E7%5Cfrac%7BI_2%7D%7BI_0%7D%3D10%5E4%5Cfrac%7BI_1%7D%7BI_0%7D%5C%5C%5C%5C%5Cfrac%7BI_1%7D%7BI_2%7D%3D10%5E3%3D1000)
The sound intensity of train is 1000 times greater than that of the library.
Units and Numbers
In order to determine an object’s speed on a Speed vs. Time graph, the axes MUST be labeled with United and numbers.