Thermal expansion ( 4 points ) Learning Objectives: Apply the formula for linear thermal expansion. The pendulum shaft of a clock is made out of brass. What is the relative change in length of the shaft, when it is heated up from 18.0 .C to 30.0 .C and what is the corresponding change in oscillation period of the clock? [ use coefficient of linear expansion of brass 2.00 . 10-5 1/K ]Heat conduction ( 4 points ) Learning Objectives: Applying formula for heat conduction. a) Calculate the energy loss in watts per square meter through a glass window 4.0 mm thick (thermal conductivity of glass of 0.80 W/(m K) ) if the outside temperature is - 5.0 .C and the inside temperature 21 .C. b) Currently the average inside temperature in public buildings is reduced to 19 .C. What is in this case the energy loss in percent compared to the result in (a)? c) Another window consists of two glass plates with the same specifications as in (a) and an air gap of 1.5 cm between two glass plates (conductivity of air of 0.026 W/(m K)). What is now the rate of energy loss if conduction is the only important energy loss mechanism