Name the branch of astronomy that involves the origin and evolution of the universe.
- Cosmology
- Meteorology
- Petrology
- Orology
×
Cosmology is "the scientific study of the large-scale properties of the universe as a whole."
Constitution day of India is celebrated on
- 26th November 1949
- 26th November 1948
- 26th January 1950
- 26th November 1946
×
The Constitution of India was adopted by the Constituent Assembly on 26th November 1949 and came into force on 26th January, 1950.
Name the economist who gave the theory of “Comparative Advantage.”
- Adam Smith
- David Ricardo
- Thomas Robert Malthus
- Amartya Sen
×
David Ricardo was a classical economist best known for his theory on wages and profit, the labor theory of value, the theory of comparative advantage, and the theory of rents.
What is the pulsating theory of the universe?
- A cosmological model that combines both the Big Bang and the Big Crunch as part of a cyclical event
- An expansion and contraction of the star as a whole in a regular periodic pulsation
- All the matter of the universe was present in a single place in the form of hot and dense fireball
- Counting of the galaxies is constant and new galaxies which are forming continuously are filling the empty spaces
×
Sir J.C. Bose proposed a theory of the ascent of sap known as the pulsation theory. The Pulsating Universe Theory says that the universe follows self-sustaining cycles such as expanding and contrasting.
Why does a star produce its own light and heat?
- Nuclear fission
- Nuclear fusion
- Chemical reaction
- None
×
Stars are huge celestial bodies made mostly of hydrogen and helium. Heat and light energy produced by the stars are due to the fusion reaction of hydrogen atoms.
