Question
The different colours of different stars are due to the
variation of –Solution
Shortly after blackbody radiation was understood, it was noticed that the spectra of stars look extremely similar to blackbody radiation curves of various temperatures, rangingfroma few thousand Kelvin to ~50,000 Kelvin. The obvious conclusion is that stars are similar to blackbodies, and that the colour variationofstarsisadirectconsequenceoftheir surface temperatures.
In a mayoral election between two nominees, 20% of the total votes were rejected as invalid. Out of the valid votes, 65% went to the winning candidate, ...
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If the population of a city increases by 20% every year and is expected to be 43,200 after 2 years, then what is its present population?
A person 'P' allocates 25% of his monthly salary towards rent. Out of the remaining salary, he spends 40% on food and clothing, saving the rest. His tot...
The population of a village two years ago was 'X'. Over the next two years, the population increased by 30% in the first year and...
Income of A is twice the income of B. B and A spend 65% and 75% respectively of their incomes. Find the savings of A, if B saves Rs. 7000 in a month.
A person saves 30% of his monthly income. If his monthly is increased by 45% and he still saves the same amount as before then find percentage increase ...
A number is first increased by 55%, and then decreased by 35%. What is the net percentage change in the original number?
If 45% of a number is 90, what is 60% of the same number?
In village P, the number of male voters is 45% more than the number of female voters. The ratio of male voters in village P to village Q is 8:5. If the ...
