The radius of a solid sphere is measured to be (6.25 ± 0.28) cm, and its mass is measured to be (1.77 ± 0.07) kg. determine the density of the sphere in kilograms per cubic meter and the uncertainty in the density. (use the correct number of significant figures. use the following formula to calculate the uncertainty in the density:

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm