Question
How are fast neutrons slowed down with the use of moderators?
✓
Answer
Neutrons form stable nuclei with protons. Protons available in heavy water mix with neutrons. Since their masses are comparable the neutrons come to rest in the collision.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
How many metres can a man weighing 60kg climb on the energy from a slice of bread which produces 1,00,000 cal of heat? Assume that the human body works at an efficiency of 28%. Take the average value of g as 9.8ms-2.
A smooth block loosely fits in a circular tube placed on a horizontal surface. The block moves in a uniform circular motion along the tube (figure). Which wall (inner or outer) will exert a nonzero normal contact force on the block?
Why parallax method cannot be used for measuring distances of stars more than 100 light years away?
Explain why:
The earth without its atmosphere would be inhospitably cold.
The earth without its atmosphere would be inhospitably cold.
Rule out or accept the following formulae for kinetic energy on the basis of dimensional arguments.
→- $\text{K}=\frac{3}{16}\text{mv}^2$
- $\text{K}=\frac{1}{2}\text{mv}^2+\text{ma}$
- $\text{K}=\frac{1}{2}\text{mv}^2$
A filter transmits only the radiation of wavelength greater than 440nm. Radiation from a hydrogen-discharge tube goes through such a filter and is incident on a metal of work function 2.0eV. Find the stopping potential which can stop the photoelectrons.
Explain, why it is not possible to increase the temperature of a gas while keeping its volume and pressure constant?
If x = a + bt + ct2, where x is in metre and t in second, what are the units of a, b and c?
A light ray is incident normally on the face AB of a right-angled prism ABC $(\mu=1.50)$ as shown in figure. What is the largest angle $\phi$ for which the light ray is totally reflected at the surface AC?
→
Can a process on an ideal gas be both adiabatic and isothermal?