What is scalar quantity? Physical quantities which can be fully expressed by magnitude only are called scalar quantities Length, mass, speed, work, energy, time, temperature, etc. are the examples of scalar quantities. What is vector quantities? Physical quantities which need both magnitude and direction to be fully expressed are called vector quantities. Displacement, velocity, acceleration, … Read more
Who invented the electric battery? Alexander Volta invented an electric battery According to Newton’s concept of time and space, how is our universe built? According to Newton’s concept of time and space our universe is built in three dimensions. What are fundamental quantities? The quantities that are independent and neutral, and do not depend on … Read more
Which characteristics of light is used to make optical fiber? Total internal reflection of light is used to make optical fiber. How much is the refractive index of glysarine? Refractive index of glysarine is 1.47. How much is the refractive index of diamond? Refractive index of diamond is 2.417. What is optical fibre? Optical fibre … Read more
Master the magic of reflection: Discover the laws that govern bouncing light and its everyday wonders. Concept of Reflection The idea that light travels in straight lines is uppermost, while its wave character and other physical aspects are disregarded. Since the laws of reflection and refraction corollaries of the wave nature. Sources of light, such as the sun, … Read more
How to reduce friction? Friction can be reduced in this way: By smoothing the surface. Using greasy materials. Using ball-bearing.
What is fundamental force? Those forces which are fundamental or independent meaning those forces which do not derive from other forces rather other forces are one type or another expression of them are fundamental forces. The four fundamental forces are: Gravitational force Electromagnetic force Weak nuclear forces and Strong nuclear force. Gravitational force The attraction … Read more
The characteristics that a body in motion wants to keep its motion in uniform velocity, is called inertia of motion.
What is inertia of rest? The characteristics that a stationary body wants to be stationary is called inertia of rest.