The thermal expansion of a solid is caused by: a. the breaking of bonds between atoms.
b. increasing the amplitude of the atoms
vibration.
c. increasing the distance between equilibrium
positions for the vibrating atoms.
d. all of the above.

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

What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

Ahockey puck sliding along frictionless ice with speed v to the right collides with a horizontal spring and compresses it by 3.0 cm before coming to a momentary stop.