Question
The sky appears blue because of
–Solution
The sky is blue because the molecules in the air scatter light in the higher wavelengths (that is, the blue light), while lower wavelength light (that is, the light on the red end of the spectrum) goes through to the ground. So the light that get finally reflected down from the scattering is blue, therefore a blue sky. This is called Rayleigh scattering.
The sum of the ages of a father and his son is 50 years. After 5 years, the father's age will be twice that of his son. What are their present ages?
- VLC Media Player is an example of which category of application software?
Let A be a 3 × 3 matrix such that |A ∣ =4. Then ∣ adj(adj(A)) ∣ equals:
155, 161, 173, 191, ?, 245
765 ÷ 25 × 100 ÷ 20 + 13 = x3 + 41, find 'x'
A container has 80 liters of a mixture of milk and water, with 60% milk. If 10 liters of water are added, what will be the new percentage of milk in th...
A rectangle has a length that is 4 cm more than its width. If the perimeter of the rectangle is 32 cm, find the dimensions of the rectangle.
If the mean of four observations is 20 and when a constant C is added to each observation the mean becomes 22 the value of C is –
The derivative of y = eË£ · cos(x) isÂ
Solve the inequality:
(3x – 4)/(x + 2) > 1
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