Tags » Physics

Inverse Square Attraction

Imagine two point-like particles experiencing mutual attraction.

The masses of the two particles are and , and their respective positions are and .

Suppose the force on particle 1 due to particle 2 is… 747 more words

Post By Paddy

Gauss's flux theorem for gravity and Newton's law

Gauss’s flux theorem for gravity (also known as Gauss’s law for gravity) in differential form says that

In this note I want to show that one can get quite far towards deriving Gauss’s law for gravity without knowing Newton’s law of universal gravitation, but not all the way. 170 more words


Maybe The Best Reason Ever To Get an Astrophysics PhD

There are a lot of reasons not to get an astrophysics PhD, as many people with astrophysics PhDs will tell you. The job market isĀ  928 more words

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What on Earth is Gravity?

Of course we all know what gravity is. It’s the force responsible for making objects fall, keeping our feet firmly planting on the ground, and maintaining the moon’s orbit around the earth. 920 more words


Maxwell's equations in matter

References: Griffiths, David J. (2007), Introduction to Electrodynamics, 3rd Edition; Pearson Education – Problem 7.37.

Inside matter, we’ve seen that the polarization and magnetization give rise to… 425 more words


Self-Knowledge 11 - the Self & the World part 1

In as much as the view of the World is a mirror image of the view of oneself since the identity of oneself determines the definition of the World. 938 more words


Amazing Waves

The wave has always been a most important and sacred form to me. One of my favorite places to be is cradled in the middle of an ocean wave as it carries me to shore. 903 more words

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