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**r**E • ln [**r**/ a ] ... Consider the rod as a very long uniformly ...z-axis and that the field point lies on the xy-plane at a perpendicular distance**r**from the cylinder axis … by taking an imaginary cylindrical Gaussian surface...1 Answers · Science & Mathematics · 10/08/2012

**R**-value is measured in meter²·°C/Watt (in the...·°F·h/Btu). Materials may be rated in**R**/inch,**R**/meter, etc. To calculate the**R**-value of a wall, you calculate...2 Answers · Science & Mathematics · 27/02/2010

**R**and 5 Ω are in series => their equivalent resistance = 27 + 5... 32 Ω, 5 Ω and 10 Ω are in parallel. If**R**' is their equivalent resistance, 1/**R**' = 1/10 + 1/5 + 1/32...2 Answers · Science & Mathematics · 28/07/2010

**r**x F is the definition of torque, where**r**and F are vectors and "x" means the vector cross...1 Answers · Science & Mathematics · 16/12/2009

...with speed v traveling in the +y direction and it is at a location of x=

**r**, y=0. It is circling around the origin as you would likely guess...3 Answers · Science & Mathematics · 23/11/2010

**r**-hat cross phi-hat = theta-hat**r**-hat is the unit vector in a direction in which only**r**changes and theta and phi...and theta-hat is the unit vector in a direction in which only theta changes and**r**and phi remain constant.1 Answers · Science & Mathematics · 07/01/2012

For the 1/

**r**^2 law, it's because the flux of the electric field through a closed surface is constant. As**r**increases, the surface area of the sphere of radius**r**increases proportional to**r**^2 (specifically 4r^2). Therefore the flux...3 Answers · Science & Mathematics · 03/04/2013

F = (m x v^2) /

**R**a. If F increases, what in the right hand equation must**R**...decrease. Do you see that there is an "inverse" relationship between**R**and F if (m x v^2) remains unchanged? b. F and...2 Answers · Science & Mathematics · 14/09/2009

**R**is your distance from the centre of mass of the Earth...or move to the equator ) you increase the distance from the centre ; you increase**R**, and reduce the force of attraction between you and the Earth... increasing...2 Answers · Science & Mathematics · 12/09/2012

**R**denotes Radius of loop,**r**denotes radius of sphere a...gt; I (moment of Inertia of sphere) = 2/5mr^2 --> v=**r***w (omega denotes angular velocity) therefore w=v/**r**--> at top of...1 Answers · Science & Mathematics · 28/11/2010