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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.
Housing: Housing is an important component of healthy environment. Probably you are aware that housing conditions for the vast majority of people in India are not up to the s
Checking Breathing and Pulse : Before attempting to resuscitate a casualty, it is essential that you check his/her breathing rate and pulse. You can cause problems if you attempt
size and length of val vulae connenvitis
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Ventures in Space: Sometimes the atmospheric conditions distort the light or radiowaves coming in from space. For instance, there may be a storm disturbing the radiowaves. O
Question: what did you learn about yourself from reading the other theories of personality?list and explain at least three things.) There is no doubt that it was very knowledgeabl
What is the term for groundwater emerging naturally at the ground surface, where the water table intersects the surface: Spring is the term for groundwater emerging aturally
Illustrate about the colour of the soil The colour of the soil gets influenced by the oxidation states of metal ions. Colours such as red, yellow and reddish brown are found u
Oxidation Weathering by oxidation is common in rocks which are rich in the elements that can be easily oxidised e.g. iron. Iron as Fe 2+ present in a mineral is oxidised to Fe
Define The Large Intestine The large intestine or colon is about five feet long. It begins at the caecum and terminates at the rectum and anal canal. It is divided into a numbe
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