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The formula for the surface area of a sphere is 4πr2.

The formula for the volume of a sphere is 4/3πr3.

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Q: Surface areas and volumes of spheres?
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How do you use pi in geometry?

Working out areas and volumes of circles and spheres respectively


What- is-the-relationship-between-cylinders'-cones'-and-spheres'-surface area?

The relationship between the surface areas of cylinders, cones, and spheres is that the surface area of a cylinder is equal to the sum of the areas of its two circular bases and its curved surface area, the surface area of a cone is equal to the sum of the area of its circular base and its curved surface area, and the surface area of a sphere is equal to four times the area of its circular base.


The ratio between the radii of two spheres is 9 2 What is the ratio of their volumes?

729/8


Consider eight little spheres of mercury each with a diameter of 1mm When they coalesce to form a single sphere how big will it be How does its surface area compare with the total surface area of?

The total volume of the new sphere will be 4 times less than the sum of all eight individual volumes. The total surface area will be about half than the total surface area of all individual balls.


Why do smaller cells have a greater surface area to volume ratio?

If the cells are spherical, the surface area increases as the square of the radius while the volume increases as the cube of the radius. Therefore, as the cells become larger, their volumes increase much more rapidly than their surface areas. Conversely, as the cells become smaller, their volumes decrease much more rapidly that their areas and so the surface area to volume increase. With non-spherical cells the calculations are much more complex, but the general pattern still applies.

Related questions

How do you use pi in geometry?

Working out areas and volumes of circles and spheres respectively


Do congruent spheres have equal surface areas?

Two spheres that are congruent are the same size and shape. Therefore, they would have the same surface area. So this statement is always true.


What- is-the-relationship-between-cylinders'-cones'-and-spheres'-surface area?

The relationship between the surface areas of cylinders, cones, and spheres is that the surface area of a cylinder is equal to the sum of the areas of its two circular bases and its curved surface area, the surface area of a cone is equal to the sum of the area of its circular base and its curved surface area, and the surface area of a sphere is equal to four times the area of its circular base.


How do you calculate Triangular prisms?

The answer to the question depends on whether you want to calculate the surface areas or the volumes, or some other measure.


If the ratio between the radii of two spheres is 23 then what is the ratio of their volumes?

Volume of a sphere of radius r: V = 4pi/3 x r3 If the ratio of the radii of two spheres is 23,then the ratio of their volumes will be 233 = 1,2167


What is the ratio for the volumes of two similar spheres given that the ratio of their radii is 27?

If the ratio is 2 : 7 then the volumes are in the ratio 8 : 343.


What are volumes in Linux?

Volumes are storage areas, such as partitions and disks.


The ratio between the radii of two spheres is 9 2 What is the ratio of their volumes?

729/8


What is the formula of a regular shape of solid?

There are different formulae for their surface areas, volumes, lengths of sides as well as for the numbers of faces, edges and vertices.


What is the ratio for the volumes of two similar spheres given that the ratio of their radii is 2 7?

It is 8 : 343.


If the ratio between the radii of the two spheres is 3 7 what is the ratio of their volumes?

27:343 *apex sucks*


What is the formula of the surface area of two spheres?

Well, the formula for the surface area for one sphere is 4∏r2So if you have two identical spheres, the formula for the surface area of both would be 8∏r2