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Iteru [2.4K]
4 years ago
15

Like DNA, RNA contains four nitrogenous bases. Three of them are the same as those found in DNA.

Biology
1 answer:
marissa [1.9K]4 years ago
4 0
In DNA, four bases have been found. They are adenine (A), guanine (G), cytosine (C) and thymine (T). The first three of these bases are found in RNA also but the fourth which is uracil (U) is absent in it. RNA contains cytosine and uracil as pyrimidine bases while DNA has cytosine and thymine.
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How much energy, in joules, is released when 17 kilograms of granite is cooled from 45°C to 21°C?
gregori [183]
Initially you need to find the specific heat of the granite. It is found in tables.

With that data, you can apply the equation: Q = m * C * ΔT


Where:

 m = 17  kg

ΔT = 45°C - 21°C = 24 °C

And, from a table the specific heat, C, of granite is 790 J/kg°C

Therefore, you get: 17 kg * 790 J/kg°C * (24°C) = 332,320

This answer is pretty close to the option A, and you can conclude that the difference is due a small difference in the specific heat used.

Answer: option A.
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