بسم هللا الرحمن الرحيم In the Name of Allah the Most Merciful the Beneficent Lecture 0 – Introduction to phys-102 7\4\1437 Common questions Physics!! Why is the sky blue? Physics!! What are clouds white? What does the sun turn red at sunset? Why do we see the mirage? How fast is fast? How far is far? Physics!! How short is short? How small is small? Physics!! أولم ينظروا في ملكوت السماوات و األرض و ما خلق {َ هللا من شيء و أن عسى أن يكون قد اقترب أجلهم. فبأي حديث بعده يؤمنون} ّ Do they not look in the dominion of the heavens and the earth and all things that Allah has created, and that it may be that the end of their lives is near. In what message after this will they then believe? (7:185) As an example let us look more carefully at some of the characteristics of water: 1- Very abundant on earth. 2- High heat capacity (for cooling). 3- Negative coefficient of expansion near zero Celsius. 4- The optical window During the course, you should be able to understand how a number of things work; this includes (but is not limited to): 1- The radar detector 2- The thermostat 3- Infrared therometers 4- The pressure cooker 5- The photocopy machine Let’s get started!!