Question
Red light is used for signals because it has
–Solution
Red is the international colour of stop signs and stop lights on highways and intersections because it is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Red has the highest wavelengthofallthecoloursandisabletotravel the longest distance through fog, rain, and the alike.
The ratio of the outer and the inner circumference of a circular path is 5: 4. If the path is 100 meters wide, then what is the radius of the inner circle?
- What was the first successful supercomputer?
A sphere has a diameter of 10 cm. A cone with a height of 10 cm and a radius of 5 cm is removed from the sphere. What is the volume of the remaining solid?
The number of aircraft produced by a company over five years is given below:
Year: 2018 2019 2020 2021 2022
Product...
 In a class, 40 like coffee, 50 like tea, 20 like both. Find number of students who like neither if total is 100.
A person has a total of ₹5000 in the form of ₹10 and ₹5 notes. If the number of ₹10 notes is twice the number of ₹5 notes, how many notes of e...
If the numerator of a fraction is increased by 150% and the denominator is increased by ___%, the fraction becomes 4/7. What is the original fraction? W...
If 5m = 3125, then find the value of 4(m-3)
A complex number z lies on or within a circle centered at (2, 0) with radius 5 units. What is the maximum value of |z – 2|?
If log₃(2x + 3) = 2 + log₃(x – 1), find x.
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