I and II only it’s has multiple paths for the electricity to flow
The question is incomplete. The complete question is :
A plate of uniform areal density
is bounded by the four curves:
![$y = -x^2+4x-5m$](https://tex.z-dn.net/?f=%24y%20%3D%20-x%5E2%2B4x-5m%24)
![$y = x^2+4x+6m$](https://tex.z-dn.net/?f=%24y%20%3D%20x%5E2%2B4x%2B6m%24)
![$x=1 \ m$](https://tex.z-dn.net/?f=%24x%3D1%20%5C%20m%24)
![$x=2 \ m$](https://tex.z-dn.net/?f=%24x%3D2%20%5C%20m%24)
where x and y are in meters. Point
has coordinates
and
. What is the moment of inertia
of the plate about the point
?
Solution :
Given :
![$y = -x^2+4x-5$](https://tex.z-dn.net/?f=%24y%20%3D%20-x%5E2%2B4x-5%24)
![$y = x^2+4x+6$](https://tex.z-dn.net/?f=%24y%20%3D%20x%5E2%2B4x%2B6%24)
![$x=1 $](https://tex.z-dn.net/?f=%24x%3D1%20%24)
![$x=2 $](https://tex.z-dn.net/?f=%24x%3D2%20%24)
and
,
,
.
So,
![$dI = dmr^2$](https://tex.z-dn.net/?f=%24dI%20%3D%20dmr%5E2%24)
, ![$r=\sqrt{(x-1)^2+(y+2)^2}$](https://tex.z-dn.net/?f=%24r%3D%5Csqrt%7B%28x-1%29%5E2%2B%28y%2B2%29%5E2%7D%24)
![$dI = (\rho)((x-1)^2+(y+2)^2)dx \ dy$](https://tex.z-dn.net/?f=%24dI%20%3D%20%28%5Crho%29%28%28x-1%29%5E2%2B%28y%2B2%29%5E2%29dx%20%5C%20dy%24)
![$I= 2 \int_1^2 \int_{-x^2+4x-5}^{x^2+4x+6}((x-1)^2+(y+2)^2) dy \ dx$](https://tex.z-dn.net/?f=%24I%3D%202%20%5Cint_1%5E2%20%5Cint_%7B-x%5E2%2B4x-5%7D%5E%7Bx%5E2%2B4x%2B6%7D%28%28x-1%29%5E2%2B%28y%2B2%29%5E2%29%20dy%20%5C%20dx%24)
![$I= 2 \int_1^2 \int_{-x^2+4x-5}^{x^2+4x+6}(x-1)^2+(y+2)^2 \ dy \ dx$](https://tex.z-dn.net/?f=%24I%3D%202%20%5Cint_1%5E2%20%5Cint_%7B-x%5E2%2B4x-5%7D%5E%7Bx%5E2%2B4x%2B6%7D%28x-1%29%5E2%2B%28y%2B2%29%5E2%20%5C%20%20dy%20%5C%20dx%24)
![$I=2 \int_1^2 \left( \left[ (x-1)^2y+\frac{(y+2)^3}{3}\right]_{-x^2+4x-5}^{x^2+4x+6}\right) \ dx$](https://tex.z-dn.net/?f=%24I%3D2%20%5Cint_1%5E2%20%5Cleft%28%20%5Cleft%5B%20%28x-1%29%5E2y%2B%5Cfrac%7B%28y%2B2%29%5E3%7D%7B3%7D%5Cright%5D_%7B-x%5E2%2B4x-5%7D%5E%7Bx%5E2%2B4x%2B6%7D%5Cright%29%20%5C%20dx%24)
![$I=2 \int_1^2 (x-1)^2 (2x^2+11)+\frac{1}{3}\left((x^2+4x+6+2)^3-(-x^2+4x-5+2)^3 \ dx$](https://tex.z-dn.net/?f=%24I%3D2%20%5Cint_1%5E2%20%28x-1%29%5E2%20%282x%5E2%2B11%29%2B%5Cfrac%7B1%7D%7B3%7D%5Cleft%28%28x%5E2%2B4x%2B6%2B2%29%5E3-%28-x%5E2%2B4x-5%2B2%29%5E3%20%5C%20dx%24)
![$I=\frac{32027}{21} \times 2$](https://tex.z-dn.net/?f=%24I%3D%5Cfrac%7B32027%7D%7B21%7D%20%5Ctimes%202%24)
![$= 3050.19 \ kg \ m^2$](https://tex.z-dn.net/?f=%24%3D%203050.19%20%5C%20kg%20%5C%20m%5E2%24)
So the moment of inertia is
.
Heat of combustion.<span> The calorific value is the total energy released as heat when a substance undergoes complete combustion with oxygen under standard conditions. The chemical reaction is typically a hydrocarbon or other organic molecule reacting with oxygen to form carbon dioxide and water and release heat.</span>
<span>The three states of matter are the three distinct physical forms that matter can take in most environments: solid, liquid, and gas. In extreme environments, other states may be present, such as plasma, Bose-Einstein condensates, and neutron stars. Further states, such as quark-gluon plasmas, are also believed to be possible. Much of the atomic matter of the universe is hot plasma in the form of rarefied interstellar medium and dense stars.</span>