Fthe sun blows up at some instant and four minutes later we on earth sit down to eat lunch, those two events are separated by a spacelike interval. the sun's blowup cannot possibly have influenced us at the time we sat down, because it takes 8 minutes for light to reach us from the sun. and since the interval is spacelike, there must be a reference frame in which the two events are simultaneolls. find the speed of this frame relative to the sun-earth rest frame.

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

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

The ozone hole appears in antarctica during