A civil engineer is to design a road curve at a 189 m radius to carry racing cars traveling at 22 m/s. µ = 0.2 θ At what angle θ should it be banked for maximum control of the racing car? The coefficient of friction of the surface is 0.2 and the acceleration due to gravity is 9.8 m/s 2 . Answer in units of ◦ .

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Question 7 [2 marks] in the circuit below, the electromotive force generated by the battery is e = 6.0 v, and the resistances are r1 = r4 = 1.0 q, r2 = r3 =2.0 q. r. the power delivered by the battery to the circuit is closest to a. 6 w в. 12 w с. 15 w d. 18 w e. 20 w final exam autumn 2014 page 5 of 9 68037 physical modelling faculty of science [2 mark] question 8 with reference to question 7, the current through resistor r2 is closest to a. 1 a в. 2 а c. 3 a d. 4 a e. 6 a

Which feature of a heating curve indicates a change ofn state