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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.
Explain the Local Hormones Local hormones affect cells in the vicinity of the organ secreting the hormone, what we call as paracrine influence. Examples of local hormones are g
What is metre?
Explain Hiccup reflex Actions - Respiratory Process It is also a reflex associated with stimulation of sensory endings in the gastrointestinal tract or other tissue through irr
please give me some variable for making of hypothesis
Zoology: The domestication of animals like horses and elephants and their use in warfare necessitated the study of their anatomy and physiology. A survey of Vedic literature h
Soil Textural Classes On the basis of the proportion of different soil separates present, the soils are classified into different groups called as soil classes. The soil class
Explain the Functions of Gastric Juice - Antiseptic Action Antiseptic action: Hydrochloric acid in the gastric juice acts as a barrier to the passage of certain microorganisms
Explain Organs of the Respiratory System The respiratory system consists of various organs. They form a clear pathway for the air to enter and leave the lungs. The body needs a
Primary processing of Rice Rice is the staple food for the majority of the world's population and is cooked in boiling water and eaten mostly with cooked pulses, vegetables, f
Explain the Types of sedimentary rocks? What is a sedimentary rock? The word sedimentary is derived from the Latin word sedimentum which means "settling", which refers to a so
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