Answer:
Damian here! (ノ◕ヮ◕)ノ*:・゚✧
Stretching is used to improve range-of-motion (ROM) of a joint, but why? The most common reason is that the joint ROM is limited and is somehow affecting performance of a desired activity. Stretching is also used as a preventative measure.
Explanation:hope this helps? :))
"Wind patterns" is the one among the following choices given in the question that <span>involves convection currents. The correct option among all the options that are given in the question is the second option or option "B". The other choices can be easily negated. i hope that this is the answer that has helped you.</span>
Answer: It is the product of the (force)multiplied by the (perpendicular) distance from the line of action of the force to the pivot
Explanation:
First choice: the inability of current technology to capture
large amounts of the
Sun's energy
Well, it's true that large amounts of it get away ... our 'efficiency' at capturing it is still rather low. But the amount of free energy we're able to capture is still huge and significant, so this isn't really a major problem.
Second choice: the inability of current technology to store
captured solar
energy
No. We're pretty good at building batteries to store small amounts, or raising water to store large amounts. Storage could be better and cheaper than it is, but we can store huge amounts of captured solar energy right now, so this isn't a major problem either.
Third choice: inconsistencies in the availability of the resource
I think this is it. If we come to depend on solar energy, then we're
expectedly out of luck at night, and we may unexpectedly be out
of luck during long periods of overcast skies.
Fourth choice: lack of
demand for solar energy
If there is a lack of demand, it's purely a result of willful manipulation
of the market by those whose interests are hurt by solar energy.
Answer:
![S_a_v_e_r_a_g_e=48km/h](https://tex.z-dn.net/?f=S_a_v_e_r_a_g_e%3D48km%2Fh)
Explanation:
Ok, the average speed can be calculate with the next equation:
(1)
Basically the car cover the same distance "d" two times, but at different speeds, so:
![Total\hspace{3}distance=2*d](https://tex.z-dn.net/?f=Total%5Chspace%7B3%7Ddistance%3D2%2Ad)
and the total time would be the time t1 required to go from A to B plus the time t2 required to go back from B to A:
![Total\hspace{3}time=t1+t2](https://tex.z-dn.net/?f=Total%5Chspace%7B3%7Dtime%3Dt1%2Bt2)
From basic physics we know:
![t=\frac{d}{S1}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7Bd%7D%7BS1%7D)
so:
![t1=\frac{d}{S1}](https://tex.z-dn.net/?f=t1%3D%5Cfrac%7Bd%7D%7BS1%7D)
![t2=\frac{d}{S2}](https://tex.z-dn.net/?f=t2%3D%5Cfrac%7Bd%7D%7BS2%7D)
Using the previous information in equation (1)
![S_a_v_e_r_a_g_e=\frac{2*d}{\frac{d}{S1} +\frac{d}{S2} }=\frac{2*d}{\frac{d*S2+d*S1}{S1+S2} }](https://tex.z-dn.net/?f=S_a_v_e_r_a_g_e%3D%5Cfrac%7B2%2Ad%7D%7B%5Cfrac%7Bd%7D%7BS1%7D%20%2B%5Cfrac%7Bd%7D%7BS2%7D%20%7D%3D%5Cfrac%7B2%2Ad%7D%7B%5Cfrac%7Bd%2AS2%2Bd%2AS1%7D%7BS1%2BS2%7D%20%7D)
Factoring:
(2)
Finally, replacing the data in (2)
![S_a_v_e_r_a_g_e=\frac{2*40*60}{60+40} =48km/h](https://tex.z-dn.net/?f=S_a_v_e_r_a_g_e%3D%5Cfrac%7B2%2A40%2A60%7D%7B60%2B40%7D%20%3D48km%2Fh)