HELPPPP!!

Create a multimedia presentation about the pros and cons of using fission as an energy source. 

A star maintains its internal thermal pressure this is possible due to which of the following energy sources.

A) Balance of gravity and outward pressure

B) presence of helium and fission reaction

C) formation of black hole and supernova

D) chemical reactions and contraction due to gravity

E) chemical reaction and brightness

Nuclear reactors generate power by harnessing the energy fromnuclear fission. In a fission reaction, uranium-235 absorbs aneutron, bringing it into a highly unstable state as uranium-236.This state almost immediately breaks apart into two smallerfragments, releasing energy. One typical reaction is

^{235} _{\ 92} {\rm U} + ^{1}_{0}{\rm n} \rightarrow \ ^{140} _{\54} {\rm Xe} + ^{94} _{38} {\rm Sr} + 2^{1} _{0} {\rm n},
where ^{1} _{0} {\rm n} indicates a neutron. In this problem,assume that all fission reactions are of this kind. In fact, manydifferent fission reactions go on inside a reactor, but all havesimilar reaction energies, so it is reasonable to calculate withjust one. The products of this reaction are unstable and decayshortly after fission, releasing more energy. In this problem, youwill ignore the extra energy contributed by these secondarydecays.

You will need the following mass data:

* mass of ^{235} _{\ 92} {\rm U} = 235.04393\;{\rm u},
* mass of ^{140} _{\ 54} {\rm Xe} = 139.92144\;{\rm u},
* mass of ^{94} _{38} {\rm Sr} = 93.91523\;{\rm u}, and
* mass of ^{1} _{0} {\rm n} = 1.008665\;{\rm u}.

a. What is the reaction energy Q of this reaction? Use c^2 =931.5\; {\rm MeV/u}.
Express your answer in millions of electron volts to threesignificant figures.
Q =


{\rm MeV}


Part B
Using fission, what mass m of uranium-235 would be necessary tosupply all of the energy that the United States uses in a year,roughly 1.0 \times 10^{19}\; {\rm J}?
Express your answer in kilograms to two significant figures.
m =


{\rm kg}



Please answer fully.... thank you

KEY TERMS

1. work (4.1)                 6. potential energy                                      11. watt

2. joule                         7. gravitational potential energy                   12. horsepower

3. foot-pound                8. conservation of total energy (4.3)             13. kilowatt-hour

4. energy (4.2)              9. conservation of mechanical energy           14. alternative energy source (4.6)

5. kinetic energy           10. power (4.4)                                           15. renewable energy sources

For each of the following items, fill in the number of the appropriate key term from the preceding list.

c. _ _ _ _ Unit of electrical energy