In fluid mechanics, the force density is the negative gradient of pressure. It has the physical dimensions of force per unit volume. Force density is a vector field representing the flux density of the hydrostatic force within the bulk of a fluid. Force density is represented by the symbol f, and given by the following equation, where p is the pressure: . The net force on a differential volume element dV of the fluid is: Force density acts in different ways which is caused by the boundary conditions. There are stick-slip boundary conditions and stick boundary conditions which affect force density. In a sphere placed in an arbitrary non-stationary flow field of viscous incompressible fluid for stick boundary conditions where the force density's calculations leads to show the generalisation of Faxen's theorem to force multipole moments of arbitrary order. In a sphere moving in an incompressible fluid in a non-stationary flow with mixed stick-slip boundary condition where the force of density shows an expression of the Faxén type for the total force, but the total torque and the symmetric force-dipole moment. The force density at a point in a fluid, divided by the density, is the acceleration of the fluid at that point. The force density f is defined as the force per unit volume, so that the net force can be calculated by: . The force density in an electromagnetic field is given in CGS by: , where is the charge density, E is the electric field, J is the current density, c is the speed of light, and B is the magnetic field. (Wikipedia).
Magnetic flux density measured for beginners: from fizzics.org
The strength of a magnetic field or the flux density can be measured using a simple balance to measure the force produced by a known opposing field. The video demonstrates this measurement using simple equipment and follows through with a calculation of the answer. Notes on measuring magne
From playlist Magnetism and electromagnetism
Physics - E&M: Ch 40.1 Current & Resistance Understood (16 of 17) What is Current Density?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the current density, for example, of a conductor of a given current (I) and current density (J) is defined as the amount of current per unit area. Next video in this series can be seen at: ht
From playlist THE "WHAT IS" PLAYLIST
Physical Science 3.4b - Density
Density. The definition of density, the equation for density, and some numerical examples.
From playlist Physical Science Chapter 3 (Complete chapter)
What is Density? | Gravitation | Physics | Don't Memorise
Understanding the concept of Density is very important in order to understand Physics. Watch this video to fully grasp the idea of density. To get access to the entire course based on Gravitation, enroll here: https://infinitylearn.com/microcourses?utm_source=youtube&utm_medium=Soical&u
From playlist Physics
Physics - E&M: Ch 40.1 Current & Resistance Understood (17 of 17) What is Current Density? Ex.
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the current density, J=?, given current, I=4amps, and diameter, D=2mm. First video in this series can be seen at: https://youtu.be/bDe4lzgQY2E
From playlist THE "WHAT IS" PLAYLIST
Describes what forces are and what they do. You can see a listing of all my videos at my website, http://www.stepbystepscience.com
From playlist Mechanics
Physics - Mechanics: Gravity (8 of 20) Determine The Density Of Earth
Visit http://ilectureonline.com for more math and science lectures! In this video I will calculate the density of the Earth.
From playlist PHYSICS 18 GRAVITY
Physics 40 Resistivity and Resistance (12 of 32) Current Density of a Conductor
Visit http://ilectureonline.com for more math and science lectures! In this video I will find the current density of a conductor.
From playlist PHYSICS 40 RESISTIVITY AND RESISTANCE
Learn more about density! http://www.flippingphysics.com/density.html
From playlist Vertical Videos
Fluid Pressure, Density, Archimede & Pascal's Principle, Buoyant Force, Bernoulli's Equation Physics
This physics video tutorial provides a nice basic overview / introduction to fluid pressure, density, buoyancy, archimedes principle, pascal's principle and bernoulli's equation. This video contains plenty of notes, equations / formulas, examples, and practice problems for you to learn fr
From playlist New Physics Video Playlist
Buoyancy and Archimedes’ Principle: Example Problems
This video goes over five example problems using buoyancy and Archimedes’ principle. This cover an important physics and fluid mechanicsprinciple and provides a basic introduction into solving problems using archimedes principle and buoyancy. Social Media for Step by Step Science: Teacher
From playlist Thermal Physics/Fluid Mechanics
This video covers Section 11.6 of Cutnell & Johnson Physics 10e, by David Young and Shane Stadler, published by John Wiley and Sons. The lecture is part of the course General Physics - Life Sciences I and II, taught by Dr. Boyd F. Edwards at Utah State University. This video was produced
From playlist Lecture 11B. Fluids
Physics 1B Final Exam Review - Pressure in Fluids
The full version of this Physics Final Exam Review contains multiple choice problems on pressure in fluids, simple harmonic motion, the simple pendulum, standing waves, sound waves, & the doppler effect. Access The Full 1 Hour 48 Minute Video on Patreon: https://www.patreon.com/MathScienc
From playlist New Physics Video Playlist
Fluid Dynamics 1 - Archimedes Principle - A Level Physics
Describes atmospheric pressure, pressure in a fluid, measuring density of unknown fluid, barometers, hydraulics and Archimedes principle.
From playlist A Level Physics Revision
Apparent Weight Physics Problems - Buoyant Force, Tension Force & Apparent Mass
This physics video tutorial explains how to solve apparent weight problems. It discusses how to calculate the apparent mass of an object, the density of a fluid and the density of an object using the buoyant force exerted by a fluid and the tension force acting on a rope. New Physics V
From playlist New Physics Video Playlist
Archimedes' Principle: GCSE revision
GCSE level Classical Mechanics covering: Archimedes' Principle
From playlist GCSE Physics Revision
Archimedes Principle, Buoyant Force, Basic Introduction - Buoyancy & Density - Fluid Statics
This physics / fluid mechanics video tutorial provides a basic introduction into archimedes principle and buoyancy. It explains how to calculate the upward buoyant force acting on an object and it shows how to derive the buoyant force formula. It discusses how to use free body diagrams t
From playlist New Physics Video Playlist
Chapter 11.6.2: Force on a liquid dielectric
MIT Electromagnetic Fields and Energy, Textbook Components with Video Demonstrations View the complete course: http://ocw.mit.edu/RES6-001S08 Instructor: Markus Zahn, James R. Melcher, Manuel L. Silva License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More cou
From playlist Electromagnetic Fields & Energy, Textbook Components w Video
How To Calculate The Buoyant Force & Load Mass of a Helium Balloon - Physics
This physics video tutorial explains how to solve the helium balloon problem. It discusses how to calculate the upward buoyant force acting on the spherical helium balloon and the maximum load mass of Iron that it can support. You need to calculate the volume of the sphere in order to de
From playlist New Physics Video Playlist
In this video, the Flipping Physics team discusses the concept of mass and density by comparing the mass and density of steel and wood. The team first addresses the misconception that steel is always more massive than wood, explaining that the mass of an object cannot be determined without
From playlist Fluids