A gas bottle contains 7.86×10^23 Oxygen molecules at a temperature of 327.0 K.
1. What is the thermal energy of the gas? (You might need to know Boltzmann's constant: kB = 1.38×10^(-23) J/K.)
2. How much energy is stored in ONE degree of freedom for the whole system?
3. What is the average energy of a single molecule?
4. On average how much energy is stored by ONE degree of freedom for ONE single molecule?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

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

Avoltaic cell converts chemical energy to