Saturday

August 2, 2014

August 2, 2014

Posted by **navneet** on Monday, September 24, 2012 at 11:46pm.

- maths -
**karuppaiah**, Tuesday, February 12, 2013 at 8:01amSince the material is same, the density is also same. The formula for mass of the sphere m =Volume x density

=4/3 (pi) (r)^3 x density

m1= 160g, r1=8cm.

r2=4cm, m2=?

160=4/3 (pi) (8)^3x density-----(1)

m2=4/3 (pi) (4)^3x density-----(2)

now equation (2)/(1)

m2/160= (4)^3/(8)^3

m2=(4/8)^3 x 160

=160/8

=20 gm

simple formula is

m2=(r2/r1)^3 x m1

**Related Questions**

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 - Two solid spheres A and B are made from the same material. The mass of...

physics - A solid uniform sphere has a mass of 7.0 104 kg and a radius of 1.2 m...

Physics - A hollow sphere of radius 25 cm is rotating at 13 rad/ sec about an ...

physics - A solid sphere of mass m and radius r rolls with out slipping along ...

Physics - A solid uniform sphere has a mass of 2.0 104 kg and a radius of 1.5 m...

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

Physics - Two uniform solid spheres have the same mass of 3 kg, but one has a ...

Geometry - A plane intersects a sphere that has a radius of 13cm. The distance ...