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Potential energy is minimum at the middle of the swing, where the mass is at its lowest point, Kinetic energy is maximum at the middle of the swing due to the highest speed. Lastly, the total mechanical energy remains constant throughout the swing, as energy converts between potential and kinetic forms.

F = MG = 25 x 20 = 500N

Exhaustible energy sources are those that are finite and will eventually run out. Fossil fuels, such as coal, oil, and natural gas, are examples of exhaustible energy sources because they take millions of years to form. On the other hand, solar energy and tidal power are renewable energy sources because they are replenished naturally and regularly. Therefore, only statement II is correct.

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

The specific heat capacity of a body is the heat energy required to raise a body of mass 1kg through a temperature of 1K.

The dew point is primarily influenced by temperature, the amount of water vapor in the atmosphere, and atmospheric pressure, but wind does not directly affect the dew point itself.

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

- Alpha radiation consists of helium- He\(^{4}_{2}\) 2 Alpha decay --> 2 X He\(^{4}_{2}\) = Element\(^{8}_{4}\) - Beta particles are high energy electrons- e\(^{0}_{-1}\) 3 Beta particles --> 3 X e\(^{0}_{-1}\) = Element\(^{0}_{-3}\) - Gamma rays are waves of electromagnetic energy, or photons. the mass and atomic number of the resulting element = U\(^{235}_{92}\) - Elements( \(^{8}_{4}\) + \(^{0}_{-3}\) ) --> Element\(^{227}_{91}\)

(a) Stree = \(\frac{F}{A}\) = \(\frac{40}{3.14(1.0 \times 10^{-3})}^2\) = \(1.27 \times 10^{7} \times 10^7 NM ^{-2}\) (b) Strain = \(\frac{e}{L} = \frac{0.24 \times 10^{-3}}{3} = 8.0 \times 10^{-5}\)

The reasons are: (a) deflected by electric or magnetic fields. (b) travel in straight lines or paths. (c) possess momentum.

(a) eV \(\frac{1}{2}MV^2\) V\(^2 = \frac{2eV}{m}\) = \(\frac{2 \times 1.6 \times 10^{-19} \times 2500}{9.1 \times 10^{-31}}\) V = \(\sqrt{8.79 \times 10^{14}}\) = 2.96 x 10\(^{7}\)

(a) In the simultaneous determination of the position x and momentum p of a particle, there is an uncertainty in its position \(\Delta\) x and an uncertainty in its momentum \(\Delta\) p. (b) The constant = h or \(\frac{h}{2 \pi}\)

Perfectly Elastic Perfectly Inelastic K.E. is conserved Colliding objects do not stick together after collision In case of head-on collision directions of the bodies are reversed K.E. decreases Colliding objects stick and move together after collision Direction of both bodies may or may not be reserved (b) (c)(i) Stage 1; S = ut + \(\frac{1}{2}at^2\) = 120 = 0 x 12 + \(\frac{1}{2}\) x a x 12\(^2\) a = \(\frac{5}{3}\) \(V_1 = u + at\) = 20 + \(\frac{5}{6} \times 12 = 30m/s\) Stage 3; S = ut + \(\frac{1}{2}\) at\(^2\) -180 = 30 x 12v + \(\frac{1}{2}\) x a x 12\(^2\) a = \(\frac{-5}{2}\) V\(_3\) = u + at = 30 + \(\frac{-5}{2}\) x 12 = 0m/s (ii) v/m\(^{s - 1}\)

(a)(i) Inertia is the reluctance of a body to move if it is at rest or to stop if it is in motion. The more the mass of a body has the greater the inertia. (ii) Inertial mass represents resistance to any type of force. The more mass a body has the more force required to give it an acceleration. Force = mass x acceleration. (b)Factors that affect the rate of evaporation are: Wind, pressure, temperature, area of surface exposed, humidity or dryness of air. (c) Ice melts when sufficient pressure is applied to it, because increase in pressure lowers the melting point of ice. When the two ice cubes are pressed together the melting point is lowered, hence they melt to form thin layer of water between them. On releasing the pressure the water formed freezes because decrease in pressure raises the freezing point. Therefore the two cubes stick together. (d)h\(_A\)e\(_A\) = \(h_Be_B\) \(h_B = \frac{h_Ae_A}{e_B} = \frac{26 \times 0.92 \times 10^3}{1.30 \times 10^3}\) = 18.4 cm

(a) Factors that affect angle of deviation: - angle of incidence - refracting angle of the prism - refractive index of the prism material. (b) N = \(\frac{360}{\theta}\) - 1 7 = \(\frac{360}{\theta}\) - 1 \(\theta = 45^o\) (c) V = s/t = \(\frac{0.8}{0.2}\) = 4 m/s (ii) (ii) (iv) The slope represents speed or velocity