Everybody in this universe has a property that it always offers some resistance to the change of its state. This property is known as Inertia and it is because of the mass of body. Therefore we need force to overcome inertia for the change of its state, either rest or motion.
1. How long is One meter? 2. One Second is how long duration? 3. One kilogram is the mass of which object? 4. Which quantities are measured in Physics and Which are not measured in Physics?
This Lecture Includes:
1. Physical and Non Physical Quantities 2. Basic / Fundamental Quantities 3. Derived Quantities with examples 4. Conversions of length , mass and time.
When the sun's light reaches the Earth's atmosphere it is scattered, or deflected, by the tiny molecules of gas (mostly nitrogen and oxygen) in the air. Because these molecules are much smaller than the wavelength of visible light, the amount of scattering depends on the wavelength.
Shorter wavelengths (violet and blue) are scattered the most strongly, so more of the blue light is scattered towards our eyes than the other colours. You might wonder why the sky doesn't actually look purple, since violet light is scattered even more strongly than blue. This is because there isn't as much violet in sunlight to start with, and our eyes are much more sensitive to blue.
The blue light that gives the sky its color, is sufficiently bright to make all the stars that we see at night disappear since the light they emit is much dimmer.
Lecture Includes:
XI Chapter No.1 : The Scope of Physics
1. Introduction to Significant Figures
2. Rules for counting Significant Figures
3. Examples of Significant Figures
Previous Lectures:
XI Lecture No.1|Introduction,History and Muslim Contribution: https://youtu.be/4tmmM3Hg5EU
XI Lecture 2| Dimensions : https://youtu.be/svzZ2fUS__8
This video explains how to determine a unit vector given a vector. It also explains how to determine the component form of a vector in standard position that intersects the unit circle.
