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No expanded working has been attached for this question yet. The verified answer is Option D.

In a traveling wave, energy is what is propagated (transferred) from one point to another through the medium. Frequency, amplitude, and wavelength remain constant (in a uniform medium) but are not the quantity being "carried along" the wave.

No expanded working has been attached for this question yet. The verified answer is Option B.

No expanded working has been attached for this question yet. The verified answer is Option A.

in a vibrating string the fundamental frequency is given by fo = v/2L therefore velocity = 2L x f. = 2 x 0.6 x 220 = 264 m/s.

if r = 40 cm , then f = r/2 = 40/2 = 20 cm then for a real image by a concave mirror, magnification M = f/u-f => 2 = 20/U-20 therefore 2(u-20) = 20 2u - 40 = 20 2u = 40 + 20 2u = 60/2 = 30 cm

Wet glass: Water's ability to adhere to the glass can cause inaccuracies in readings due to meniscus formation and inconsistent surface tension.

The angle of refraction will be zero as the angle of incidence is zero in this case. This is a rule, that whenever a ray strikes perpendicularly or normally to a surface, no refraction will take place and hence the ray will pass through without deviating from its path.

if you blow dry air over the glass you blow away this extra water vapor, thereby decreasing the amount of water vapor entering the glass.

No expanded working has been attached for this question yet. The verified answer is Option D.

From the relation PV = nRT V = 10-33; n = 3 moles; T = 27 + 273 = 300k R = 8.3 j mol-1 K-1 => P = nRT/V = 3 X 8.3 X 300/10-3 = 7.47 X 106 Nm-2

In longitudinal waves, such as sound waves in a liquid or gas, the displacement of the particles in the oscillation is always in the direction of propagation, so these waves do not exhibit polarization.

a)(i) Nuclear fission is a nuclear reaction in which a heavy nucleus is split into different lighter nuclei emitting neutrons with the release of a large amount of energy. (ii) Nuclear fusion is a nuclear reaction between two light nuclei at high temperatures formic a heavier nucleus with the release of a large amount of energy. (b)(i) Applications of atomic energy are: - for the production of nuclear weapons for warfare - in the generation of electric power - for health diagnosis and radiotherapy - to detect leakages. In underground pipes carrying oils or gases. (ii) Half life is the time required for radioactive substance to decay to half of its original quantity. (iii) T = \(\frac{0.693}{\lambda}\) (c)(i) \(^{226}_{88} X \) ---> \(^{222}_{88} Y + ^4_2He\) By the emission of \(\alpha\) the mass number of X decreases by 4 the atomic number by 2 to give daughter nucleus Y (ii) \(^{222}_{86} Y \) ---> \(^{222}_{87} Z + ^0_{-1} e\) By the emission of \(\beta\) particle the mass number of Y is unchanged while the atomic number of Y is unchanged while the atomic number is increased by 1. (iii) \(^{226}_{87} Z \) ---> \(^{222}_{87} Z + ^0_0\gamma\) By emission of \(\gamma\) radiation, the mass and atomic number of Z remain unchanged.

The energy store is equal to the work done in stretching the wire from E to F given by the \(\frac{1}{2}\)Fe where e = 0.10 - 0.50 = 0.05m. F = 0.2 + 0.1 = 0.3N = \(\frac{1}{2}\) x (0.2 + 0.1) x (0.10 - 0.50) = 7.5 x 10\(^{-3}\)J

The work done on this object is given by the area of the triangle, which is equal to 1/2 fx