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Frequency remains unchanged as waves travel from one medium to another because it is characterized by the source of the wave.

polarization, property of certain electromagnetic radiations(such as radio waves, visible light, and gamma rays) in which the direction and magnitude of the vibrating electric field are related in a specified way

- Friction depends on the nature of the surfaces in contact

Circular motion has uniform

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