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It's mv^2/

**r**. Here is how you can stop doubting: That formula...projection of the whole force on the plane perpendicular to the trajectory) provided "**r**" is understood to be the "radius of curvature" of the...1 Answers · Science & Mathematics · 12/08/2008

g = GM/

**r**^2 is the gravity field, as in PE = mgh, where**R**-**r**>= h is the height above**r**, the radius of the source mass M (e.g., Earth).**R**is the radius struck from the center of the source mass to the location...4 Answers · Science & Mathematics · 18/12/2012

p(

**r**) gives you the charge per unit volume of the region. To find the charge... charge in the region = charge per unit volume x volume So dq = p(**r**) x dV where dV is the volume of the thin shell. (Note...2 Answers · Science & Mathematics · 26/05/2011

If

**r**is rotated about v, then the...same. So the approach is to express**r**in terms of v and also the coordinate... check that I can recover the original**r****r**=**r**_v . i_v * i +**r**_v . j_v * j +**r**_v...1 Answers · Science & Mathematics · 28/12/2013

U(

**r**) = mA[(r0/**r**)^12 - 2(r0/**r**)^6] (i) units of A must be m²... is in Joules. (ii) dU/dr = 0 = mA[-12*r0^12 /**r**^13 + 2*6*r0^6 /**r**^7] and this is zero where 12*r0^12 /**r**^13 = 12*r0^6 /**r**...2 Answers · Science & Mathematics · 07/12/2016

Assume that

**R**and C are connected in series to a cell of...differential equation, by first dividing the equation by**R**and then multiplying the equation with the integration factor e...1 Answers · Science & Mathematics · 04/07/2010

Hello Zeeshan, v =

**r**w as we consider only the magnitudes. As we write in... at the centre Hence ds =**r**d@ Now divide both sides by dt So ds...4 Answers · Science & Mathematics · 14/11/2012

The curvature for a parametrically defined curve

**r**(t) = x(t)∙i + y(t)∙j + z(t)∙k is given...problem**r**(t) = 3∙t∙i + 4∙sin(t)∙j + 4∙cos(t)∙k =>**r**'(t) = 3∙i + 4∙cos(t)∙j - 4∙sin(t)∙k**r**''...1 Answers · Science & Mathematics · 12/06/2013

Answer ... V = -

**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