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The passage explains that in urban areas, where people from different regions converge, there is a need for mutual intelligibility to enable effective communication. This demand or pressure leads people to adopt a standard dialect, which becomes the common language or "lingua franca" among them. Therefore, mutual intelligibility arises due to the need for clear communication in such diverse environments.

The passage primarily discusses how a standard dialect emerges in a language community, especially in urban areas where people from diverse regions come together. It addresses the transition from native dialects to a standard dialect and how individuals adopt this dialect for effective communication. This makes "the emergence of a standard language" the most fitting title.

The passage explains that: Rural dwellers tend to maintain their indigenous dialects due to limited movement. Urban dwellers need a standard dialect to facilitate communication in a diverse environment. Since a language community consists of both groups, its members naturally control at least two dialects, using them as needed in different social contexts.

in vibrations in string, the fundamental frequency happens to be the first harmonic, and is given as f\(_0\) = \(\frac{V}{2l}\) Where V = Velocity of the sound wave, I = Length of the string. The second harmonic is the first overtone given by f1 = \(\frac{V}{l}\) = 2f0 ; and the third harmonic happens to be the second overtone, given by f2 = \(\frac{3V}{2l}\) = 2f0. Thus if V = 120m/s and l = 1.5m Thus f1 = 2f0 = 2 x 40 = 80Hz Thus f2 = 3f0 = 3 x 40 = 120Hz Thus we have in order, 40Hz, 80Hz, 120Hz

Electrical Energy = IVt = 4 x 240 x (1 x 60) = 57600J = 5.76 x 104J

The angle of dip is the angle which the resultant earth's magnetic field makes with the horizontal. At the magnetic equator, which is entirely along the horizontal this angle is zero

According to Avogadro's law which states that equal volumes of different gases contain the same number of molecules at the same temperature and pressure. If the number of molecules gas X contains, is Z molecules, therefore, gas Y will also contain Z molecules. Option C is the correct answer

\(2H_2 + O_2 → 2H_2O\) 4g → 36g 8g → X X → \(\frac{ 36 \times8}{4}\) = 72.0g

If it were a neutral atom,the number of proton would have been equal to number of electron = 9 each However, since the number of electrons is by 1 greater than that of proton, and since electrons having more number than proton are negatively charged, the particle must be a negative ion.

Gamma rays are used to treat cancer as part of a type of cancer treatment called radiation therapy. Gamma rays can pass through several inches of lead or a few feet of concrete. They can even pass through the human body, damaging tissue and DNA.

In 1910, Millikan successfully measured the charge of the electron to be 1.6 x 10\(^{-19}\)C. Positive rays were discovered by Eugen Goldstein, in 1886. J.J. Thomson discovered the charge-to-mass ratio of an electron in 1897: Cathode rays were discovered by. J. J. Thomson

Element Z has electronic configuration of 2, 8, 8, 2. This implies it's in group 2 (Alkaline earth metals). Actually, the element is most likely to be Calcium with an atomic number of 20. The correct answer is option C

168X, m8X [\(\frac{90}{100}\times 16\)] + [\(\frac{10}{100}\times m\)] = 16.2 14.4 + 0.1m = 16.2 0.1m = 1.8 m = \(\frac{1.8}{0.1}\) m = 18

The average kinetic energy of a gas's molecules increases as the temperature of the gas increases.The kinetic energy of a gas is directly proportional to its temperature. This means that as the temperature of a gas increases, so does the average kinetic energy of its molecules.

The movement of ships helps break up the oil slick, increasing its surface area and promoting natural dispersion by wave action and microbial degradation. The other options are incorrect. The is the reason: A. Pouring detergents – While detergents can break oil into smaller droplets, they can also introduce harmful chemicals into the water, affecting aquatic life. C. Pouring organic solvents – This is harmful as it can introduce toxic chemicals into the water, worsening pollution. D. Evaporation – While some lighter fractions of oil can evaporate, this is a slow process and does not effectively disperse the pollution.