1008f_Promo_2005_with_answers(2)

1008f_Promo_2005_with_answers(2) - RAFFLES JUNIOR COLLEGE...

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1 RAFFLES JUNIOR COLLEGE 2005 PROMOTION EXAMINATION Leve l : JC 1 Time: 2 h 30 min Date: 4 October 2005 PHYSICS Section A & Section C RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE RAFFLES JUNIOR COLLEGE INSTRUCTIONS TO CANDIDATES There are 3 Sections in this paper. Section A consists of 15 multiple-choice questions. For each question, 4 suggested answers are given . You are to choose the most appropriate one and shade your answers on the OMR form. You are advised not to spend more than 30 minutes on Section A. Section B consists of 4 structured questions. You are to write your answers in the spaces provided. Section C consists of 2 longer structured questions. You are to write your answers on the writing paper provided. Begin your answer to each question on a fresh page. Attempt ALL questions in Sections A, B and C. Answers to Sections A, B and C are to be handed in separately . There are 15 printed pages in this booklet.
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2 DATA AND FORMULAE Data speed of light in free space, c = 3.00 x 10 8 m s -1 permeability of free space, μ 0 = 4 π x 10 -7 H m -1 permittivity of free space, 0 = 8.85 x 10 -12 F m -1 elementary charge, e = 1.60 x 10 -19 C unified atomic mass constant, u = 1.66 x 10 -27 kg rest mass of electron, m e = 9.11 x 10 -31 kg rest mass of proton, m p = 1.67 x 10 -27 kg molar gas constant, R = 8.31J K -1 mol -1 the Avogadro constant, N A = 6.02 x 10 23 mol -1 the Boltzmann constant, k = 1.38 x 10 -23 J K -1 gravitational constant, G = 6.67 x 10 -11 N m 2 kg -2 acceleration of free fall, g = 9.81 m s -2 Formulae uniformly accelerated motion, s = ut + ½ at 2 v 2 = u 2 + 2 as work done on/by a gas W = p Δ V gravitational potential φ = - Gm/r refractive index n = 1/sin C resistors in series R = R 1 + R 2 + . . . . resistors in parallel 1/ R = 1/ R 1 + 1/ R 2 + . . . . electric potential V = Q /4 π∈ 0 r capacitors in series 1/ C = 1/ C 1 + 1/ C 2 + . . . . capacitors in parallel C = C 1 + C 2 + . . . . energy of charged capacitor W = ½ QV alternating current/voltage x = x 0 sin ω t hydrostatic pressure p = ρ gh pressure of an ideal gas p = 3 1 V Nm < c 2 >
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3 SECTION A (30 MARKS) 1. The equation governing the volume rate of flow, V t , of a fluid under streamline conditions through a horizontal pipe of length A and radius r is 4 () (8 ) Vp r t π η = A where p is the pressure difference across the pipe and is the viscosity of the fluid. In an experiment to find for water, a student quotes his result as 31 1 1.755 10 kg m s −− × and estimates the percentage uncertainties in his measurements of V t , p , A and r as 2.5%, 1.5%, 0.5% and 7.0% respectively. How should he have expressed the value of viscosity, ?
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This note was uploaded on 10/12/2010 for the course C 11 taught by Professor Na during the Spring '10 term at Rappahannock Community College.

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1008f_Promo_2005_with_answers(2) - RAFFLES JUNIOR COLLEGE...

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