no be quiet
There is nothing to prove there. The second has been DEFINED to be the unit of time in the SI.
The mass and volumes of electrons are not significant compared to the volume of an atom.
This may appreciate knowing the volume of the atom, and the total volume of atomic particles (protons, neutrons and electrons).
That is not even true!
In any and all circles, the ratio of the circumference to the diameter is a constant called 'pi' ~ 3.14159 and since a full circle contains 2 pi radians = a constant 360 degrees, then the radian itself is a constant angle ~ 180/3.14159 = 57.3'.
since the iron loss depends only on the volage and frequency,the supply volage is 230v ac.Hence iron loss is always constant
Multiply both numbers by 4.
Submerse the object in a completely full bucket. measure the volume of the displaced water due to the object. Multiply the volume of the displaced water by the density of the object to give mass.
Albert Einstein gave the theory of relativity to prove that the speed of light is always constant and greatest......
This is easiest done with integral calculus. The basic idea is to divide the pyramid into lots of thin, flat, parallel slabs, calculate the volume of each, and add it up.
It isn't. If the cylinder and the cone have the same height and radius, the cylinder has a larger volume (twice as large). If they do not have the same height and radius you need more information to prove their relative volumes.
I'm quite sure this is impossible to prove, because the volume of a sphere is not equal to the volume of a cylinder with the same radius and height equal to the sphere's diameter. This can be shown as: Volume of sphere = (4*pi*r3) / 3. Volume of cylinder = pi*r2*h. Here, the height, h, of the cylinder = d = 2r. So, the volume of the cylinder = pi*r2*2r = 2*pi*r3, which obviously does not equal the volume of the sphere. The volume of half a sphere (with radius r) is equal to the volume of a cylinder(whose height is equal to its radius, r) minus the volume of a cone with the same height and radius. Therefore, the volume of a sphere is just double that. If you follow the nearby link, you can see a nice demonstration of that.