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Cyan is a bluish-green colour

L\(_1\) = 100cm, T\(_1\) = 200\(^o\)C L\(_2\) = 99.4cm,T\(_2\) = ? \(\alpha\) = 2 x 10\(^{-5}\)C\(^{-1}\) \(\alpha\) = \(\frac{L_2 - L_1}{L_1(T_2 - T_1)}\) 2 x 10\(^{-5} = \frac{99.4 - 100}{100( T_2 - 200)} = \frac{-0.6}{100(T_2 - 200)}\) 2 x 10\(^{-5}\) x \(100(T_2 - 200) = -0.6\) \(T_2 - 200 = \frac{-0.6}{0.002} = - 300^oC\) \(T_2 = 200 - 300 = -100^oC\)

In kinetic molecular model, gases are energized and thus moves freely, fast as they occupy specific space

Tsin30 + Tsin30 =40 2Tsin30 = 40 Tsin30 = 40/2 = 20 T(\(\frac{1}{2}\)) = 20 T = 20 x 2 = 40N

V = u _ at, at u = 44m/s 44 + [-4]10 4m/s

Lamps in lightenings are arranged to reduce the heat losses - resultant resistance is small for parallel arrangement which indicate low heat losses [Heat \(\alpha\) R]

During the transformation of the matter from the solid to the liquid state, the heat supplied does not produce a temperature increase because all the heat is used to break the bonds holding the molecules of the solid together

\(\frac{R}{3.6} = \frac{75}{25} = \frac{1}{3}\) 3R = 3.6 R = 1.2\(\Omega\)

Electron was discovered J.J Thompson in 1879

Rutherford assumed that (I) energy is radiated when electrons are revolving (II) energy is radiated in a continuous mode. These are limitations of Rutherford's model

Reactance is the value of an indicator or a capacitor in ohms

The fluctuation of d.c signal results from the rectification of A.C source to d.c.

Surface tension or elasticity of a fluid decreases with increased temperature

u + v = 40 \(\frac{v}{u}\) = 3 v = 3u u + 3u = 40 4u = 40 u = 10cm v = 3u = 30cm f = \(\frac{uv}{u + v} = \frac{10(30)}{10 + 30} = \frac{300}{40}\) = 7.5 cm

- a ray of light passing through the centre of a curvature is returned along the same path - angle difference along the same path is zero