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Why are clouds White? Why does a day have 24 hours? Answer: A cloud is a visible accumulation of very tiny water droplets or solid ice that float in the air. Clouds are usually white in appearance due to the fact that it reflects all the visible wavelengths of light from the sun. The sun's light made up of different colors(rainbow colors)that appear as a white light when combined. These colors can demonstrated using a prism that scatters the sun's light. The water droplets or ice crystals that make up the cloud reflect all the light of the seven visible wavelengths (red, orange, yellow, green, blue, indigo, and violet) all together without dispersing each color. Thus the clouds are white because they effectively reflect the wavelengths of visible light spectrum of the sun in all directions more or less equally. Answer for 2nd Question For thousands of yearspeople all over the world have been using terms and divisions like "day","night","hour", "minute", "yesterday", "tomorrow" to talk about lengths of time The idea of "a day"- from when the sun rises to when it sets-has always been a pretty basic way of thinking about time. Within "a day" people usually break down time into units we call hours. Nobody knows the exact reason why it was decided to measure out an hour so that 24 of them would fit in to a day, but we do know the practice goes all the way back o the ancient Egyptians. One reason they choseto divide a day in to a 12-hour day and a 12-hour night is probably because they used to count a system based on 12. Its also possible they chose 12 because that was the number of moon cycles in a year. , The Egyptians made and used sundials to tell time and by looking at the remains of these, we can trace what is believed to be the origins of our 24-hour day back to them.
what are the micro organism in yeast used in bread production
Define the term Amplitude In simpler terms, amplitude is the amount or relative value of a signal. Amplitude is measured in units of pressure e.g. Newtons/sq. m. But what is ph
Are these people a worker in a farm? Which is the Independent and Dependent variable and Control group.
How to make an experimental biter Fit a one-hole stopper carrying a short length of glass tube into the small end of a lamp chimney. Put a little cotton wool in the bottom and
Objectives After you have completed this exercise, you should be able to: 1. Enlist all the fire extinguishers available in the labs and relate them to the type of fire
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What is ablation? Ans) Ablation is a technological term for the loss of snow and ice from a glacier. The process happens by a combination of the two physical processes, meltin
Hypothesis: The next step is to formulate hypothesis. A hypothesis is a statement, put forward on the basis of reasoning, about the things that are being studied. It is an att
explain the factors that led to the decline of science in europe during iron agen..
What is the common name for the test that provides the hardness of the material by the size of an indent left in it by a standard steel ball? The Brinell Test
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