1)
B: I think it was 5.48 to 2dp
35nx1.5m = 52.5j
G.D.P = energy transferred, so
53.5 = 1/2x3.5kgx(velocity)^2
Rearrange to get 30 = velocity ^2
Velocity = 5.48m/s
9 and beyond
A)Source C, because it has to be gamma as alpha gets absorbed by the skin. C was closer to a half life of one hour. (2000/2 = 1000 which is close to 980)
B) Alpha can't be detected as it gets absorbed by all materials on the badge.
C) beta went to the second one, gamma to the first one.
D) energy produced by reactor is 4,500,000,000j
E) can't remember
F) some man thinks that the perceived risk is higher than the statistical risk because he has no control over the plant, he doesn't know how it works and so might seem dangerous to him, past nuclear disasters, media and can't see radiation.