# Dark matter and Dark energy

Dark energy and dark matter, what it is? We call it dark because we can’t see it, like at all. Reality is we don’t know what it is, no idea where it came from and yet it makes up 96 percent of matter in the universe. Yes 96 percent of the stuff of the universe […]

# Does Sound Travel at the Speed of Light?

No, sound travels 1100 feet per second and light travels 186,000 miles per second. The speed of sound in air is 323m/s at zero degree C. As the temperature rises, sound travels faster. On a hot summer day, the speed of sound can be 15m/s faster than on a cold winter day. Sound travels roughly one-fifth […]

# Applied Physics MCQ

For each of the question there are four possible choices. Pick the correct answer from the following. (a) The distance traveled by a particle along the three axes are given by 3X = 6t^ (3), y = 2t^ (2) + 8t and z = 6t – 7. The initial velocity of the particle is 1. […]

# Heisenberg Uncertainty Principle – Part 3

Let’s solve some problems based on uncertainty principle and wave particle duality. Problem 1:Estimate the minimum uncertainty in the ‘x’ component of the linear momentum of an electron whose position is measured to an uncertainty of 10Ao. Solution: According to Heisenberg uncertainty principle Δ x. Δ Px  ≥ h / 4π here Δ x = […]

# What are the Four Fundamental Forces in Physics?

We know that there are four fundamental forces in the universe: gravitational, electromagnetic and the strong and weak nuclear forces. All forces which will be important in understanding the mechanics of the human body and other biological systems may ultimately be reduced to these fundamental forces. 1. Gravitational force All masses attract each other with a […]

# Make Physics Learning Interesting With Online Tutoring

Physics is a popular branch of science subject. Based on the study of matter, motion, energy and space-time, physics concepts and principles are widely used in various technological innovations. It is due to the physics concepts and principles; we are able to use computer, automobile, cell phone, medical equipment, television, and several other advanced devices […]

# Heisenberg Uncertainty Principle – Part 2

The earlier mentioned developments in part-1  led to the concept of wave-particle duality in which light was characterized as having both properties (wave and particle). The wave theory of light explains the phenomena of interference of light and diffraction of light; and particle (or photon) theory of light explains the phenomena of photoelectric effect and […]

# Heisenberg Uncertainty Principle – Part 1

One of the fundamental implications of quantum theory is the uncertainty principle – that is, the fact that certain pairs of physical quantities cannot be measured simultaneously with arbitrary accuracy. How does Werners Heisenberg uncertainty principle affect the determination of a particle’s location and velocity? “Heisenberg uncertainty principle states that the position and the the […]