B)............... Have a good day, Have a nice day:)
Answer:
(a) ![\alpha =-1.43rev/sec^2](https://tex.z-dn.net/?f=%5Calpha%20%3D-1.43rev%2Fsec%5E2)
(b) 4.17 rev
(c) 6.40 sec
Explanation:
We have given the angular velocity of fan decreases from 550 rev/min to 180 rev/min
So initial angular speed ![\omega _0=550rev/min=\frac{550}{60}=9.166rev/sec](https://tex.z-dn.net/?f=%5Comega%20_0%3D550rev%2Fmin%3D%5Cfrac%7B550%7D%7B60%7D%3D9.166rev%2Fsec)
Final angular speed ![\omega =180rev/min=\frac{180}{60}=3rev/sec](https://tex.z-dn.net/?f=%5Comega%20%3D180rev%2Fmin%3D%5Cfrac%7B180%7D%7B60%7D%3D3rev%2Fsec)
Time is given as t = 4.3 sec
(a) We know that angular acceleration is given by ![\alpha =\frac{\omega -\omega _0}{t}=\frac{3-9.166}{4.3}=-1.43rev/sec^2](https://tex.z-dn.net/?f=%5Calpha%20%3D%5Cfrac%7B%5Comega%20-%5Comega%20_0%7D%7Bt%7D%3D%5Cfrac%7B3-9.166%7D%7B4.3%7D%3D-1.43rev%2Fsec%5E2)
(b) We know the relation \Theta =\omega _0t+\frac{1}{2}\alpha t^2=9.166\times 4.3-\frac{1}{2}\times 1.43\times 4.3^2=26.1935rad=\frac{26.1935}{2\pi }=4.17rev
(c) Now final angular velocity ![\omega =0rev/sec](https://tex.z-dn.net/?f=%5Comega%20%3D0rev%2Fsec)
So time ![t=\frac{0-9.166}{-1.43}=6.40sec](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B0-9.166%7D%7B-1.43%7D%3D6.40sec)
Answer:
all atoms will be more stable if they a full valance shell or a full outer most shell or my teacher also tell us that the lucky number is 8 and if an atom has 8 valance electron it will be stable, like the noble gas
Explanation:
Answer:
To differentiate the two concepts each colour represents (perhaps)
Explanation:
Where is the map?
I think c it’s probably c yea but I’m sorry if it’s wrong