CHEMISTRY
PHYSICS
ENVIROMENTS
100
Hydrogen
What is the first element on the periodic table?
100
collision between fast neutrons and nitrogen nuclei present in the atmosphere
Radiocarbon is produced in the atmosphere as a result of
100
Environment is defined as the surroundings in which the organism lives
Define environment.
200
Reactants
What is the name given to substances that are initially involved in a chemical reaction?
200
the level of the liquid in the two vessels are at the same height
Siphon will fail to work if
300
Isotopes
Atoms of the same chemical element that have different atomic mass are known as?
300
Fermi
Nuclear sizes are expressed in a unit named
400
Base
Is sodium hydroxide (NaOH) an acid or base?
400
capillary action phenomenon
The absorption of ink by blotting paper involves
500
Carbon
What is the fourth most abundant element in the universe in terms of mass?
500
both the heating effect of current and hysteresis loss
Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
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