If a 2.0-MeV neutron released in a fission reaction loses half its energy in each moderator collision, how many collisions are needed to bring it to (1/25 ) eV?
A)
6
B)
18
C)
26
D)
30
E)
4
Question 2
A 5.0-C charge is 10 m from a small test charge. What is the magnitude and direction of the electric field at the location of the test charge?
What will be an ideal response?