a sphere of uniform density and radius R is floating on water , partially immersed such that the distance between the top of the sphere and the water surface is R/2 find the density of the sphere Homework Equations Archimedes Principle The Attempt at a Solution One can deduce from the...
When the rotating star collapses, the core continues to rotate, and this carries over to the black hole (conservation of angular momentum). The Kerr black hole has the following parts: Singularity: the collapsed core Event horizon: the opening of the hole Ergosphere: an egg-shaped region of...
What happens to a force between two charges if the distance between them is tripled? Why does increasing the charge on two particles by a factor of 2 while decreasing the distance by a factor of 2 cause the force to increase by a factor of 16? What is the relationship between increasing...
Two atoms of hydrogen are combined to create helium-4 and energy in several steps: Two protons combine to form a deuterium atom (hydrogen atom with one neutron and one proton), a positron (similar to an electron, but with a positive charge) and a neutrino. A proton and a deuterium atom...
A conceptually straightforward approach of this type is to truncate the CFT in radial quantisation to its zero modes on the sphere. When performed on a background suitable for a given BPS black hole, one arrives at a supersymmetric quantum mechanics whose Witten index by construction matches a ...
To find the total charge, we can use the charge density formula, sigma= Q/A, where A is the area of the surface. Since the cell membrane is like a parallel-plate capacitor, we can assume that the area of the inner and outer surfaces are the same. Therefore, we can calculate the to...
surface is equal to the total charge contained inside the shape divided by the permittivity of free space. This law can be derived from Coulomb's law, after taking the important step of expressing Coulomb's law in terms of an electric field and the effect it would have on a test charge...
Types of Functions: How To Know if It’s a Function Thevertical line testis a simple way to figure out if you have a function. You could also use to “many to one” rule: Is a function: “many to one“. This is saying if you have multiple x-values that map to one y-value —...
If you want to skip the“how to start a blog”tutorial and just grab the tools I use to get started with blogging, here are the top tools and resources I recommend. You’ll find them again at the end, so feel free to read the entire post first before coming back to these. Importan...
It turns out that there are many different things you can do with two pieces of glass, and these things can have a big effect on you when you use the lenses. As you will see in this article, there really is a difference between the various sunglasses you'll find out there. There ...