Along electric cable is suspended above the earth and carries a current of 345 a parallel to the surface of the earth. the earth’s magnetic field has a value of 5.6 × 10−5 t and makes an angle of 88.2 ◦ with respect to the cable. what is the magnitude of the force f exerted on a cable of length 46.9 m due to the earth’s magnetic field? answer in units of n

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

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.