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Since they seem to be elementary particles, perhaps they have no such thing as a diameter - you might thing of them as "point-like". This issue isn't settled yet; from the Wikipedia article on elementary particles: "For mathematical purposes, elementary particles are normally treated as point particles, although some particle theories such as string theory posit a physical dimension."

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13y ago

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When 8 spheres with a diameter of 1mm coalesce to form a single sphere how big will it be?

The volume of a sphere is 4/3 (pi) (R)3 .The volume of each of the 8 spheres is 4/3 (pi) (0.5)3 .That's (pi/6) mm3 each and 4pi/3 mm3 all together.To find the size of the combined sphere, start againwith the volume formula and solve it for the radius:V = 4/3 pi R3Multiply each side by 3/4 :3/4 V = pi R3Divide each side by pi :3V/4pi = R3Take the cube root of each side:R = the cube root of (3V/4pi)Up above, we wound up with a volume of 4pi/3 mm3 .So the radius of our new sphere iscube root of (3V/4pi) = cube root of (3/4pi x 4pi/3) = cube root of (1) = 1 mm==========================Check the answer (and a much easier way in whichthe answer could have been found):-- Volume of a sphere = 4/3 pi R3 .Notice that the volume is proportional to the cube of the radius,and therefore also to the cube of the diameter.-- The volume of the big sphere was 8 times the volume of the little ones.So the big diameter should be the cube root of 8 times the small diameter.-- The cube root of 8 is 2.The small diameter is 1.The big diameter should be 2 x 1 = 2 .-- I calculated the big radius as 1.-- Yay !


What lifts up object faster a big pulley or a small pulley?

A big pulley generally lifts an object faster than a small pulley. This is because a big pulley has a larger diameter, which means the object will be lifted a greater distance in each rotation compared to a smaller pulley.


How wide is a pencil?

A standard pencil is typically about 7 millimeters in diameter, which is roughly 0.28 inches.


How big would the sun be if it collapsed into a black hole?

If the Sun collapsed into a black hole, it would be about 3 kilometers in diameter.


How big is the moon compared to the sun?

The moon is much smaller than the sun. The sun is about 400 times larger in diameter than the moon.