A concrete sphere of radius r has a cavity

Asked by admin @ 17/08/2021 in Physics viewed by 291 People

A concrete sphere of radius R has a cavity of radius r which is packed with sawdust. The specific

gravities of concrete and sawdust are respectively 2.4 and 0.3 for this sphere to float with its entire
volume submerged under water. Ratio of mass of concrete to mass of sawdust will be (a) 8
(b) 4 (C) 3 (d) Zero

Answered by admin @ 17/08/2021

Answer:

hope it helps you see the attachment

A uniform sphere of mass m and radius r

Asked by admin @ 13/08/2021 in Physics viewed by 338 persons

A uniform sphere of mass M and radius R is surrounded by a concentric spherical shell oof same mass but radius 2R . A point mass m is kept at …

A solid sphere of uniform density and radius r

Asked by admin @ 13/08/2021 in Physics viewed by 363 persons

A solid sphere of uniform density and radius R apies a grav force of attraction =F1 on a particle placed at A distance of 2R fro the centre of the …

Twenty seven solid iron spheres each of radius r

Asked by admin @ 20/08/2021 in Math viewed by 292 persons

"Question 9 Twenty seven solid iron spheres, each of radius r and surface area S are melted to form a sphere with surface area S'. Find the (i) radius r' …

A small sphere of radius r falls from rest

Asked by admin @ 11/08/2021 in Math viewed by 263 persons

A small sphere of radius r falls from rest in a viscous fluid

A wire of length l and radius r

Asked by admin @ 31/08/2021 in Physics viewed by 304 persons

A wire of length l radius r is stretched by a force f and a second wire of same material with kength 2l and radius 2r is stretched with a …

A conducting ring of radius r is placed perpendicularly

Asked by admin @ 23/08/2021 in Physics viewed by 300 persons

a conducting ring of radius r is placed perpendicularly inside a time varying magnetic field given by B=Bi+ alpha•t. Bi and alpha are positive constant.Emf induced in the ring is

A circular hoop of mass m and radius r

Asked by admin @ 23/08/2021 in Physics viewed by 340 persons

A circular hoop of mass m and radius R rests flat on a horizontal frictionless surface. A bullet also of mass m, and moving with a velocity v, strikes the …

A wheel of radius r is placed on ground

Asked by admin @ 20/08/2021 in Physics viewed by 397 persons

A wheel of radius R is placed on ground and its contact point is P. if wheel starts rolling without slipping and completes half a revolution, find the displacement if …

A spherical ball of mass m and radius r

Asked by admin @ 20/08/2021 in Physics viewed by 302 persons

A spherical ball of mass m and radius r rolls without slipping on a rough concave surface of large radius R. It makes small oscillation about the lowest point. Find …

A round balloon of radius r subtends an angle

Asked by admin @ 20/08/2021 in Math viewed by 278 persons

A round balloon of radius 'r' subtends an angle 'alpha' at the eye of the observer while the angle of elevation of its centre is beta. Prove the height of …

A particle describes a horizontal circle of radius r

Asked by admin @ 20/08/2021 in Physics viewed by 322 persons

Solve it A particle describes a horizontal circle of radius r on a smooth surface of an inverted cone as shown the height of the plane of circle above vertex …

The radius of a sphere is increased by 10

Asked by admin @ 20/08/2021 in Math viewed by 304 persons

The radius of a sphere is increased by 10% . Prove that the volume will be increased by 33.1% .

A metal ball of radius r is placed concentrically

Asked by admin @ 17/08/2021 in Physics viewed by 363 persons

A metal ball of radius `r` is placed concentrically inside hollow metal sphere of inner radius `2r` and outer radius `3r`.The ball is given a charge `+2q` and the hollow …

A spherical body of mass m and radius r

Asked by admin @ 17/08/2021 in Physics viewed by 346 persons

A spherical body of mass m and radius r is allowed to fall in a medium of viscosity η. The time in which the velocity of the body increases from …

A solid cylinder of radius r and height h

Asked by admin @ 17/08/2021 in Math viewed by 338 persons

a solid cylinder of radius R and a height h is placed over other cylinder of Mi same height and radius find the total surface area of the shape formed