Science Quiz 22

I. More neutrons are released in each of the fission reactions. 
II. The neutrons immediately take part in the fission process.
III. The fast neutrons are slowed down by Graphite. 
IV. Every neutron released in the fission reaction initiates further fission. 

Which of these statements are correct?

Choose the correct option.

List I (Characteristic) 

1. Zero mass 
2. Fractional charge

III. Fractional spin 

1. Integral spin 

List II (Particle)

1. A) Positron
2. B) Neutrino
3. C) Quark
4. D) Phonon

I. The acceleration is zero when the bob passes through the mean position. 
II. In each cycle the bob attains a given velocity twice.
III. Both acceleration and velocity of the bob are zero when it reaches its extreme position during its oscillation. 
IV. The amplitude of oscillation of the simple pendulum decreases with time.