A moderator is used in nuclear reactors in order to
1 Increase the number of neutrons
2 Decrease the number of neutrons
3 Slow down the speed of neutrons
4 Accelerate the neutrons
The hardest substance available on earth is 1 Platinum 2 Coal 3 Diamond 4 Gold
13 Answers FCI, University of Ilorin,
A substance which changes readily into vapor without heating is called 1 Efflorescent 2 Synthetic 3 Volatile 4 Effervescent
What is the wavelength of visible spectrum? 1 1300A-3000A 2 3900A-7600A 3 7800A-8000A 4 8500A-9800A
Why sun seems to be a red colour while sun-rising and sun- setting?
What is one light hour?
The metallic constituents of hard water are 1 Magnesium, calcium and tin 2 Iron, tin and calcium 3 Calcium, ,magnesium and iron 4 None of these
In which year, atmospheric observations using balloons started?
How does a RCCB work? Difference between ELCB & RCCB?
what is defination of conductivity? How much conductivity of water ? what is effect when conductity of water low or high?
Which of the following metals is a better conductor of electricity? A. Silver B. Copper
In fireworks, the green flame is produced because of 1 Mercury 2 Sodium 3 Potassium 4 Barium
The wavelength of X-ray is of order of 1 1 cm 2 1m 3 1 Angstrom 4 10 micron