Exercise 1

please help me step by step, I need to understand this!thanks

a. Use the transmissivity graph for SiO2 (main component in carwindows) to describe why a car gets really heated up from theinside during a sunny day.

b. tell me what the thermal contact resistance means and why isit significant from the point of thermal management?

c. determine the heat transfer by this composite wall. Theconductives, area and temperatures are given below and onedimensional heat transfer is assumed.

Visible-- 1.0 0.8 0.6 Thickness T2 0.038 cm 0.4 0.318 cm 0.2 0.635 cm 0 0.25 0.4 0.6 1.5 3.1 4.7 6.3 7.9 0.7 Wavelength 2, um
B A D E С
Conductives A 50 W/mK B 10 W/mK C 6.67 W/mK D 20 W/mK E 30 W/mK Area of A=D= E= 1m² B = C = 0.5m? Temperature entering wall A = 800°C Temperature leaving wall E = 100°C