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 Answe

**r**s · Science & Mathematics · 12/08/2008g = 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 Answe

**r**s · Science & Mathematics · 18/12/2012p(

**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 Answe

**r**s · Science & Mathematics · 26/05/2011U(

**r**) = mA[(**r**0/**r**)^12 - 2(**r**0/**r**)^6] (i) units of A must be m²... is in Joules. (ii) dU/d**r**= 0 = mA[-12***r**0^12 /**r**^13 + 2*6***r**0^6 /**r**^7] and this is ze**r**o whe**r**e 12***r**0^12 /**r**^13 = 12***r**0^6 /**r**...2 Answe

**r**s · Science & Mathematics · 07/12/2016**R**= V/I First calculate the relative uncertainty in V, subtract the relative uncertainty in I from that. Thus you obtain the relative uncertainty in**R**. Using**R**you can then calculate the absolute uncertainty. Example...1 Answe

**r**s · Science & Mathematics · 28/06/2012Assume 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 Answe

**r**s · Science & Mathematics · 04/07/2010Hello 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 Answe

**r**s · Science & Mathematics · 14/11/2012**R**and the 200 ohm resistors are in parallel so the voltage across both of...same Voltage across 200 ohm resistor = 200*1.5 = 300V current through**R**resistor = 2.5 - 1.5 = 1 Ampere Voltage through**R**resistor = 300...4 Answe

**r**s · Science & Mathematics · 15/02/2012The cu

**r**vatu**r**e fo**r**a pa**r**amet**r**ically defined cu**r**ve**r**(t) = x(t)∙i + y(t)∙j + z(t)∙k is given...p**r**oblem**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 Answe

**r**s · Science & Mathematics · 12/06/2013Answe

**r**... V = -**r**E • ln [**r**/ a ] ... Conside**r**the**r**od as a ve**r**y long unifo**r**mly ...z-axis and that the field point lies on the xy-plane at a pe**r**pendicula**r**distance**r**f**r**om the cylinde**r**axis … by taking an imagina**r**y cylind**r**ical Gaussian su**r**face...1 Answe

**r**s · Science & Mathematics · 10/08/2012