81 The neutron carry
No charge
82 Atomic energy is obtained from splitting of
Atoms of any substance
83 Various particles in an atom have been bound together by a kind of force called
Energy or heat
84 After persistent decay, radium would be finally changed into
Lead
85 Beta rays are
Fast moving electrons
86 Bombardment of cosmic rays becomes harmless for earth life because of
Earth-bound atmosphere
87 A green object looks green because
It reflects green colour
88 The bending of a beam of light when it passes from one medium to another medium is known as
Refraction
89 In addition to fuel what is the most essential element to produce fire?
Oxygen
90 An electrocardiogram is used to detect malfunctioning of the
Circulatory System
