All substances are matter but all matters are not substance. Matter is generally a loose term used in respect to a substance. Matter and substance are sometimes used for the same context, this is certainly not correct. Various examples have already proved that a matter will not always be a substance depending on its physical nature, but a substance is always a matter.
(cc/ to Taskmasters , I just switched it up a little bit.)
Solution :
The sun emits =
J of energy per second
= ![$4 \times 10^{26} \ kg m^2 s^{-3} $](https://tex.z-dn.net/?f=%244%20%5Ctimes%2010%5E%7B26%7D%20%5C%20kg%20m%5E2%20s%5E%7B-3%7D%20%24)
We know, ![$1 \ J =1 \ kg \ m^2 / s^2 $](https://tex.z-dn.net/?f=%241%20%5C%20J%20%3D1%20%5C%20kg%20%5C%20m%5E2%20%2F%20s%5E2%20%24)
, where C = ![$3 \times 10^8 \ m/s$](https://tex.z-dn.net/?f=%243%20%5Ctimes%2010%5E8%20%5C%20m%2Fs%24)
![$E=mC^2$](https://tex.z-dn.net/?f=%24E%3DmC%5E2%24)
![$J=M(M/s)^2$](https://tex.z-dn.net/?f=%24J%3DM%28M%2Fs%29%5E2%24)
Dividing both sides by 1 second
![$\frac{J}{s}=M \times m^2 s^{-3}$](https://tex.z-dn.net/?f=%24%5Cfrac%7BJ%7D%7Bs%7D%3DM%20%5Ctimes%20m%5E2%20s%5E%7B-3%7D%24)
Then, ![$4 \times 10^{26} \ J/s = M \times m^2 s^{-3} \times (3 \times 10^8)^2$](https://tex.z-dn.net/?f=%244%20%5Ctimes%2010%5E%7B26%7D%20%5C%20J%2Fs%20%3D%20M%20%5Ctimes%20m%5E2%20s%5E%7B-3%7D%20%5Ctimes%20%283%20%5Ctimes%2010%5E8%29%5E2%24)
![$M = \frac{4 \times 10^{26}}{9 \times10^{16}}$](https://tex.z-dn.net/?f=%24M%20%3D%20%5Cfrac%7B4%20%5Ctimes%2010%5E%7B26%7D%7D%7B9%20%5Ctimes10%5E%7B16%7D%7D%24)
![$M=4.44 \times 10^9 \ kg$](https://tex.z-dn.net/?f=%24M%3D4.44%20%5Ctimes%2010%5E9%20%5C%20kg%24)
Now according to the information, 99.3% hydrogen.
If 0.7 % of hydrogen produce =
J of energy per second
Then 1% of hydrogen will produce =
J energy per second
So, 100% of hydrogen will produce =
J energy per second
=
J energy per second
Mass of hydrogen undergo fusion in sun per second
![$E=mC^2$](https://tex.z-dn.net/?f=%24E%3DmC%5E2%24)
Similarly, ![$\frac{J}{s}=M \times m^2 s^{-3}$](https://tex.z-dn.net/?f=%24%5Cfrac%7BJ%7D%7Bs%7D%3DM%20%5Ctimes%20m%5E2%20s%5E%7B-3%7D%24)
![$5.714 \times 10^{28} \ J/s = M \times (3 \times 10^8)^2 \ m^2 \ s^{-3}$](https://tex.z-dn.net/?f=%245.714%20%5Ctimes%2010%5E%7B28%7D%20%5C%20J%2Fs%20%3D%20M%20%5Ctimes%20%283%20%5Ctimes%2010%5E8%29%5E2%20%5C%20m%5E2%20%5C%20s%5E%7B-3%7D%24)
kg
kg
The correct option is this: WHEN THE ENTHALPY CHANGE OF THE REACTION IS POSITIVE, THE REACTION IS ENDOTHERMIC.
All chemical reactions are divided into two classes, these are exothermic and endothermic reaction. An exothermic reaction is a type of reaction in which energy is lost to the environment, thus the enthalpy change of the reaction is negative. An endothermic reaction is a type of reaction in which energy is absorbed from the environment, thus the enthaply change of the reaction is positive.
Geomagnetic storms could impact power grids, blacking out entire cities, disconnecting radio communications and GPS navigation. Hope this helped! :)