Why is a well-insulated building comfortable in both cold and hot weather? the insulation keeps the cold in during the summer and the cold out in the winter. the insulation becomes a good conductor in the cold weather. the insulation becomes a good conductor in the hot weather. the insulation keeps the heat in during the winter and the heat out in the summer.

If an inclined plane is 5 m long and 2 m high, what is its mechanical advantage? a. 2.5 b. 3 c. 7 d. 10

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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