This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How many grams of deuterium (atomic mass = 2.014 1 u) must be fused to helium (atomic mass 4.002 6 ... (Read 153 times)

PhilipSeeMore

  • Hero Member
  • *****
  • Posts: 561
on: Jul 28, 2018
How many grams of deuterium (atomic mass = 2.014 1 u) must be fused to helium (atomic mass 4.002 6 u) in one second to produce 3 000 MJ of energy? 1 u = 1.66  10-27 kg

Question 2

The theory of nuclear astrophysics is that all the heavy elements like uranium are formed in the interior of massive stars. These stars eventually explode, releasing these elements into space. If we assume that at the time of the explosion there were equal amount of U-235 and U-238, how long ago did the star(s) explode that released the elements that formed our Earth? The present U-235/U-238 ratio is 0.007 0 . The half-lives of U-235 and U-238 are 0.7  109 yr and 4.47  109 yr.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Jsherida

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 28, 2018
Answer to Question 1

0.005 2 grams

Answer to Question 2

5.9 billion years


PhilipSeeMore

  • Member
  • Posts: 561
Reply 2 on: Jul 28, 2018
Wow, this really help

Dnite

  • Member
  • Posts: 297
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

When intravenous medications are involved in adverse drug events, their harmful effects may occur more rapidly, and be more severe than errors with oral medications. This is due to the direct administration into the bloodstream.

Brain mass as a function of body mass in mammals. Brain mass as a function of body mass in mammals.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
The Mass-Luminosity Relation The Mass-Luminosity Relation
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Atomic Structure Atomic Structure
An analytical procedure requires a solution of chloride ions. How many grams of MgCl2 must be ... An analytical procedure requires a solution of chloride ions. How many grams of MgCl2 must be ...
Video: The Krebs Cycle Animation

For a complete list of videos, visit our video library