Why are the girders on the railway bridges fixed at one end only?

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Giraffe in Arabic means "the highest of all." The height of a giraffe is an average of 5 m, its mass is about 800 kg and hooves is an area of approximately 625 cm2. Using a straw from a material nedeformabil a giraffe trying to drink water from a lake, not to condescend. What is the ratio of the minimum pressure to be applied giraffe, mouth, at the end paiului to drink water and pressure of giraffe on the ground. The density of water. g = 10 m/s2

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What is the difference between Centigrade and Fahrenheit thermometers ?

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Describe the Infra-red and Ultra-voilet rays?

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What is optical medium?

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Why are the days and nights equal at the Equator throughout the year?.

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explain principle of potentiometer

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heat cannot pass from a cooler substance to a warmer substance without some other process being involved. This is an example of which law of thermodynamics?

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Which element has the simplest absorption spectrum?

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Why the height of the mercury column is affected by the change in temperature ?

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What is centigrade thermometer ?

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direction of friction on a front and rear wheel of a bicycle when accelerated?

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