Control rods are used to slow down the reaction in the reactor core when the core becomes too hot. select the best answer from the choices provided true or false

True

The control rods are lowered after a certain stage in a nuclear reactor, to absorb the neutrons , which reduces the number of reactions taking place in the reactor. As the number of reactions gets reduced, less amount of heat energy is produced and in case is the entire control rod is inserted in the core of reactor, the reactor completely shuts down  

the bal will not change its velocity.

80cm/s.

24cm/s.

53.3cm/s.