The gravitational force of attraction between two students sitting at their desks in physics class is 3.9 × 10−8 n. if one student has a mass of 56.5 kg and the other has a mass of 61.5 kg, how far apart are the students sitting? the universal gravitational constant is 6.673 × 10−11 n · m2 /kg2 . answer in units of m.

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

12. a body is a particular amount of matter. it can be a solid, liquid or gas. it can be described as existing in a. size and shape. b. motion and force c. time and space. d. location and movement.

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.