U235
U237
U232
U236
The isotope used for the production of atomic energy is
The known forces of nature can be divided into four classes, viz, gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not right?
The Laser is a beam of radiations which are
The latent heat of fusion of ice is _ cal/g.
The law of definite proportions was stated by
The law which states that wave-length of maximum radiation is inversely proportional to the absolute of the emitting body is known as
The Leaning Tower of Pisa does not fall because
The least penetrating power ray is
The Length of the Day is determined in
The lens used in a simple microscope is
