Answer:B
Explanation:
Because the Earth's core isn't moving around earth therefore the center of Earth will forever be warm
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Description
In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Since force is a vector quantity, impulse is also a vector quantity. Impulse applied to an object produces an equivalent vector change in its linear momentum, also in the resultant direction.
It will be unaffected by the magnet because it has no magnetic field. If you were to maybe have electricity going through it is the only way it would have anything to do with the magnet.
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We have a problem with three different state of the ratio of flow velocity to speed of sound.
That is,
a) Mach number to evaluate is 0.2, that mean we have a subsonic state.
The equation here for lift coefficient is,
![c_1 = 2\pi \alpha](https://tex.z-dn.net/?f=c_1%20%3D%202%5Cpi%20%5Calpha)
where
should be expressed in Rad.
![\alpha = \frac{5}{57.3}= 0.087](https://tex.z-dn.net/?f=%5Calpha%20%3D%20%5Cfrac%7B5%7D%7B57.3%7D%3D%200.087)
So replacing in equation for subsonic state,
![c_1 = 2\pi (0.087)=0.548](https://tex.z-dn.net/?f=c_1%20%3D%202%5Cpi%20%280.087%29%3D0.548)
b) In this situation we have a transonic state, so we need to use the Prandtl-Glauert rule,
![c_{t}=\frac{\c{t_0}}{\sqrt{1-M^2_{\infty}}} = \frac{0.548}{\sqrt{1-0.7^2}}=0.767](https://tex.z-dn.net/?f=c_%7Bt%7D%3D%5Cfrac%7B%5Cc%7Bt_0%7D%7D%7B%5Csqrt%7B1-M%5E2_%7B%5Cinfty%7D%7D%7D%20%3D%20%5Cfrac%7B0.548%7D%7B%5Csqrt%7B1-0.7%5E2%7D%7D%3D0.767)
c) For this case we have a supersonic state, so we use that equation,
![c_s = \frac{4\alpha}{\sqrt{M^2_{\infty}-1}}=\frac{4(0.087)}{\sqrt{2^2-1}}=0.2](https://tex.z-dn.net/?f=c_s%20%3D%20%5Cfrac%7B4%5Calpha%7D%7B%5Csqrt%7BM%5E2_%7B%5Cinfty%7D-1%7D%7D%3D%5Cfrac%7B4%280.087%29%7D%7B%5Csqrt%7B2%5E2-1%7D%7D%3D0.2)