Answer:
Ws=8.75 Watts
Explanation:
As per fig. of prob 02.061, it is clear that R5 and R4 are in parallel, its equivalent Resistance will be:
![\frac{1}{Req45}=\frac{1}{R4}+\frac{1}{R5}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq45%7D%3D%5Cfrac%7B1%7D%7BR4%7D%2B%5Cfrac%7B1%7D%7BR5%7D)
![\frac{1}{Req45}=\frac{1}{5}+\frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq45%7D%3D%5Cfrac%7B1%7D%7B5%7D%2B%5Cfrac%7B1%7D%7B4%7D)
![\frac{1}{Req45}=0.2+0.25=0.45\\ Req45=2.22](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7BReq45%7D%3D0.2%2B0.25%3D0.45%5C%5C%20Req45%3D2.22)
Now, this equivalent Req45 is in series with R3, therefore:
![Req345=R3+Req45\\Req345=4+2.22\\Req345=6.22](https://tex.z-dn.net/?f=Req345%3DR3%2BReq45%5C%5CReq345%3D4%2B2.22%5C%5CReq345%3D6.22)
This Req345 is in parallel with R2, i.e
![Req2345=(R2^{-1}+Req345^{-1} )^{-1}\\ Req2345=(4^{-1}+6.22^{-1} )^{-1} \\Req2345=2.43](https://tex.z-dn.net/?f=Req2345%3D%28R2%5E%7B-1%7D%2BReq345%5E%7B-1%7D%20%20%29%5E%7B-1%7D%5C%5C%20Req2345%3D%284%5E%7B-1%7D%2B6.22%5E%7B-1%7D%20%20%29%5E%7B-1%7D%20%5C%5CReq2345%3D2.43)
Now this gets in series with R1:
![Req12345=R1+Req2345\\Req12345=9+2.43\\Req12345=11.43](https://tex.z-dn.net/?f=Req12345%3DR1%2BReq2345%5C%5CReq12345%3D9%2B2.43%5C%5CReq12345%3D11.43)
Now, the power delivered Ws is:
![Ws=Vs*I=\frac{Vs^{2}}{Req} \\Ws=\frac{10^{2} }{11.43} \\Ws=8.75 Watts](https://tex.z-dn.net/?f=Ws%3DVs%2AI%3D%5Cfrac%7BVs%5E%7B2%7D%7D%7BReq%7D%20%20%5C%5CWs%3D%5Cfrac%7B10%5E%7B2%7D%20%7D%7B11.43%7D%20%5C%5CWs%3D8.75%20Watts)
An isolated system , it does not allow any matter or energy to be exchanged
Answer:
(a) True
Explanation:
A supernova is a powerful light explosion that occurs in massive stars.
During a supernova, the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron, such as silver, uranium and lead, to be produced.
Therefore, the correct option is "a" True
Elements more massive than iron (e.g. silver, uranium and lead) are created from supernova events.
In a closed system, energy in form of heat (work) can be exchanged but not matter.
The answer to your question is C.
Hope it helped!
This type of wave is a transverse wave. Transverse waves are always characterized by particle motion being perpendicular to wave motion. A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.