Title 2024 DSE PHY P1A E.pdf ✅

Section A There are 33 questions. Questions marked with * involve knowledge of the extension component. Takeg=9.81 m s> 1. Substance P and Q are of the same mass and both are solids at temperature 7;. The graph below shows the variation of temperature of the substances with energy transferred. temperature /F‘ energy transferred Which statement below is correct ? A. P has a higher melting point than Q. B. The specific latent heat of fusion of P is smaller than that of Q. C. The specific heat capacity of solid P is greater than that of solid Q. D. At temperature 73, P is gas while Q is solid. 2 1£ 0.5 kg of water at 50 °C is mixed with 2.0 kg of ice at 0 °C, what is the final temperature of the mixture ? Given: specific heat capacity of water = 4200 J kgTM' °CTM! specific latent heat of fusion of ice =3.34 x 10° J kgTM A. ~54 °C B. 0°C C. 10 °C D. 25°C *3, The best vacuum attained in the laboratory has a pressure of about 10~® Pa. Estimate the order of magnitude of the number of air molecules in 1 cm® of such ‘vacuum’ at room temperature. A. 10* B. 10° C. 108 D 1012 2024-DSE-PHY 1A-2 2