41 Sometimes a cycle with well inflated tyres left in the sun has its tubes burst open. Why?
Because the pressure of the air inside the tube increases
42 The inter relation between matter and energy was first proposed by
Einstein
43 The Empirical formula of a substance is
The simplest formula which express its composition by weight
44 The force of attraction between like molecules is called
Cohesion
45 The science of study of coins is
Numismatics
46 The study of punishment and prison management is called
Penology
47 Louis Brail invented
Printing Press
48 Larynx is also called
The Adam’s Apple
49 Leukaemia or cancer of the blood is caused by the excessive growth in the blood of
White Blood Cells
50 Caries is a disease of the
Teeth
