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\(Wavelength (\lambda) = 10^{-13}m\) Speed of X-ray = speed of light \(C = 3\times10^{8}m/s\) Frequently (f) = ? \(Using V = f\lambda (or (– f \pi for electromagnetic wave)\) \(f = \frac{c}{\lambda} = 3 \times 10^{8} \div 10^{-13} = 3 \times 10^{8} \times 10^{13}\) = \(3 \times 10^{8} \times 10^{13}\) = \(3 \times 10^{21}Hz\)

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

The simplest way to change the boiling point of a liquid is to change the surrounding pressure. (a) Using a closed system to artificially increase that pressure will raise the boiling point of a liquid. (b) Boiling point is dependent upon the strength of the bonds between its molecules. For this reason, adding a solute to the liquid will create stronger bonds between molecules, raising the solution’s boiling point without increasing pressure.

Fig (I) (II) (III) are they in which a transformer was designed to reduce an energy loses by reducing through this collective designed or efforts

Mercury and alcohol are often used in THERMOMETER Note:Water is never allowed to be used in thermometer because, it doesn’t expand uniformly

Neutron were discovered by James Chadwick in 1931

Max Range = \(\frac{u^2}{\text{g}}\) 36 = \(\frac{u^2}{9.8}\) u\(^2\) = 36 x 9.8 = 352.8 u = \(\sqrt{352.8}\) ≈ 18.78m/s

Note: relative density has no S.I unit ∴ Relative density = weight of substance ÷ weight of equal volume of water RD = w1 ÷ (w1 – w2) (no S. I unit)

f α (MM ÷g2) F(GMM ÷ r2) [G – gravitational constant] GMM = Fr2 G = F02 ÷ MM = m × aπr2 ÷ MM (f = ma) = (m × m5-2 × r2) ÷ MM = (Kg.m52 × m2) ÷ Kg.Kg =1 ÷ kg.m3.52 The dimension mathematically representation have a quantities of M, L AND T M (Mass) = kg, L (Length) = M, T (Time) second G = kg-1 m2.52(Using dimension rule) M-1.L3.T-2 ∴ The universal gravitational constant (G) =\( M­^{–1}L^3 T^{–2} \)

A good electric cell should proses the following 1. A long life of an electric cell, 2. A minimum of polarization effect 3. A cheap and safe electrolytes Except D cost and dangerous of the electric cell

Vr.m.s = V0 ÷ V2, where Vr.m.s rep. to as voltage root –square mean, v = peak voltage Vr.m.s = 200volt, v = ? 200 = V0 ÷ V2 V0 = 200v2 = 200 × 1.414 = 282.8 volts V0 = b &approx.; 283 volts

Convection take place commonly in liquids (water) and slightly in gasses

The regular arrangement of atoms in a crystalline materials is called LATTICES

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

Sclerotic coat (sclera) is the tough outer coat of the eye that coves the eyeball (ii) sclerotic coat is modified in front of the eye to from a transparent and horny window