Can anything be done to stretch out the fuel supply for fission ...

[fox]

Can anything be done to stretch out the fuel supply for fission nuclear reactors so that such reactors could be used for many more centuries?
 
  A) No, because fission reactors must use uranium, and uranium resources will run out within a century.
  B) No, because fission reactors must use plutonium, and plutonium resources will run out within a century.
  C) Yes, by converting the 238U into 235U and then fissioning the 235U.
  D) Yes, by converting 238U into plutonium and then fissioning the plutonium.
  E) Yes, by using uranium that is less highly enriched that the uranium fuel in use today.

Question 2

A ball drops some distance and loses 30 J of gravitational potential energy. Do NOT ignore air resistance. How much kinetic energy did the ball gain?
 
  A) more than 30 J
  B) exactly 30 J
  C) less than 30 J

[abro1885]

Answer to Question 1

D

Answer to Question 2

C

[fox]

Thanks for the timely response, appreciate it

[smrtceo]

Wow, this really help