Monday

September 22, 2014

September 22, 2014

Posted by **noah** on Tuesday, February 7, 2012 at 3:34am.

- college physics -
**drwls**, Tuesday, February 7, 2012 at 5:13amArea A = 4 pi R^2

lnA = ln(4 pi) + 2 ln R

dA/A = 2 dR/R = 2*(alpha)*dT

delta A = 2A*alpha*(delta T)

OR

A at T + deltaT

delta A = 4 pi (R + deltaR)^2 - A

= 4 pi R(1 + alpha*deltaT)^2 -A

= 4 pi R^2 *[1 + 2*alpha*deltaT +

(alpha*deltaT)^2] - A

= 2*A*alpha*deltaT + A*(alpha*deltaT)^2

(Ignore the second term in deltaT^2)

- college physic -
**noah**, Tuesday, February 7, 2012 at 6:49amTQ^^

**Answer this Question**

**Related Questions**

Calculus Homework - You are blowing air into a spherical balloon at a rate of 7...

PHYSICS - A 494 kg uniform solid sphere has a radius of 0.390 m. Find the ...

Algebra - A sphere has a radius of 4x + 1. Which polynomial in standard form ...

physics - solid sphere of uniform density starts from rest and rolls without ...

college physics - Two solid spheres A and B are made from the same material. The...

college physics - Two solid spheres A and B are made from the same material. The...

Physics - A uniform 5.32 kg solid sphere of radius 0.344 m that is free to roll ...

Geometry/Algebra/Calculus - Why isn't the surface area of a sphere with radius r...

physics - A uniform brass disk of radius R and mass M with a moment of inertia I...

math - direct variation the surface area of a sphere varies directly as the ...