A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 3 m/s. But 2.5 seconds later, at the bottom of the slope, its speed is 25 m/s. What is its average acceleration?

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

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

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life