The Kelvin is the international unit of temperature. Zero kelvin is the lowest possible temperature (approximately minus 273 degrees Celsius), and a difference of 1 Kelvin is the same as a difference of 1 degree Celsius. Thus, for example, 273 Kelvin = 0 degrees Celsius, while 373 Kelvin = 100 degrees Celsius.
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what is the value of sin 75 degree
No because the exact value of pi has never been finally determined
Do you mean the exact value of pi, which is 3.141592653589793238462643383...? You could, but it would be quite difficult to do without a calculator, and it's pointless, really. 3.14 is just the short way of writing pi. Most teachers just tell or expect you to use 3.14.
18° C = 291.15 KThe nearest whole number is 291 K.
Its decimal value keeps going on forever, without ever repeating. It can never be reduced to an exact fraction value of two whole integers.It means that pi is an irrational number and as such can not be expressed as a fraction