Answer:ummm ok
Explanation:I really don’t get it but ok
It could measure the person's speed or also known as velocity. The object could be similar to a police officer using a radar gun to measure someone's MPH/speed.
1) There must not be credible contrary evidence to the ideas suggested by the theory.
2) The models and theories must obey the already established laws of physics. Laws are theories which have such an overwhelming amount of evidence that they are universa, and cannot be disproven.
<span>Under normal conditions, the forced expiratory volume is normally 75-85 % of the vital capacity.
According to its definition, forced expiratory volume (FEV) refers to "how much a person can exhale during a forced breath." And a person can exhale from 75 to 85 percent of their entire breathing capacity. This is one of the tests to check the function of the lungs. </span>
Answer:
13.02 m/s the velocity and 86.92 degrees the direction relative to ground
Explanation:
We need to add velocities in vector addition to find the resultant velocity "
" of the balloon (the 13 m/s and the 0.7 m/s).
The velocities are at 90 degrees from each other (one pointing up and the other to the East). Notice from the attached image that the resultant velocity vector (picture in red) is actually the hypotenuse of a right angle triangle.
So we use Pythagoras to find the length (magnitude) of the resultant velocity vector:
![v = \sqrt{13^2 +0.7^2} = 13.018832...](https://tex.z-dn.net/?f=v%20%3D%20%5Csqrt%7B13%5E2%20%2B0.7%5E2%7D%20%3D%2013.018832...)
we can round the answer to 13.02 m/s
Now we need to find the angle that this new vector makes with the ground by using the definition of tangent of an angle that relates the two quantities that we just added:
![tan (\theta) = 13/0.7 \\ \theta = arctan (\frac{13}{07} = 86.91781918...](https://tex.z-dn.net/?f=tan%20%28%5Ctheta%29%20%3D%2013%2F0.7%20%5C%5C%20%5Ctheta%20%3D%20arctan%20%28%5Cfrac%7B13%7D%7B07%7D%20%3D%2086.91781918...)
So we round it to 86.92 degrees