Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2016 - Paper 1
Question 2
Complete the sentence by putting a cross (X) in the box next to your answer.
The difference between fission and fusion is that only fission
A creates new nuclei
B... show full transcript
Worked Solution & Example Answer:Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2016 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The difference between fission and fusion is that only fission is triggered by neutrons. Therefore, the correct answer is B.
Step 2
Insert the correct numbers into this sentence:
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A nucleus of uranium-235 contains 92 protons and 143 neutrons.
Step 3
Describe the purpose of the moderator in a nuclear fission reactor.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The purpose of the moderator in a nuclear fission reactor is to slow down the fast neutrons produced during the fission process. By reducing the speed of these neutrons, the moderator increases the probability of further fission reactions occurring, thereby sustaining the chain reaction necessary for the reactor to operate efficiently. Common materials used as moderators include water and graphite.
