× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
w
5
a
3
j
2
a
2
t
2
u
2
r
2
j
2
j
2
l
2
d
2
y
2
Home Q & A Board Science-Related Homework Help Physics Astronomy
New Topic  
ridhima14598 ridhima14598
wrote...
Go to Answer
Posts: 491
Rep: 0 0
6 years ago
A radioactive substance containing 4.00  1016 unstable atoms has a half-life of 2.0 days. What is its activity (in curies) after 1 day?
 
  What will be an ideal response?

Question 2

In the fission reaction 235U + 1n 141Ba + 92Kr + neutrons, the number of neutrons produced is
 
  A) 0.
  B) 4.
  C) 1.
  D) 3.
  E) 2.

Question 3

Suppose that in a certain collection of nuclei there were initially 1024 nuclei and 20 minutes later there was only one nuclei left, the others having decayed.
 
  On the basis of this information, how many nuclei would you estimate decayed in the first 6 minutes?

Question 4

The Q value for a particular reaction is -2.4 MeV, and the reaction's threshold energy is 9.60 MeV. What is the ratio of the mass of the incident particle to the mass of the stationary target nucleus?
 
  A) 5
  B) -0.75
  C) 3
  D) 0.25
  E) 4

Question 5

If the half life for Radium-226 is 1600. years, how long is the quarter life?
 
  What will be an ideal response?
Read 58 times
3 Replies
Replies
Answer verified by a subject expert
blvanblvan
wrote...
#1
Top Poster
Posts: 563
Rep: 2 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

ridhima14598 Author
wrote...
#2
6 years ago
Wow! Thanks you for this correct set of answers, wasn't expecting it...
wrote...
#3
6 years ago
My pleasure!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1385 People Browsing
 186 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 1559
  
 347
  
 177
Your Opinion
Which of the following is the best resource to supplement your studies:
Votes: 365
Previous poll results: Who's your favorite biologist?