Science

Pi is a natural constant of the ratio circumference divided by diameter. That ratio cannot have any unit.

The metre is the metric unit for distance. You can also use fractions like cm, or multiples like km.

Depends entirely on the context, most letters is scientific formulae have multiple uses in different fields.

S is commonly use to denote distance or displacement in mechanics

s is the unit of time, seconds, but this is shown as a t in equations

S is used in physics and chemistry to show a change in entropy

S is also the letter of choice for the unit Siemens, a measure of electrical conductance.

There is no single formula. It depends on the shape of the object whose volume you are trying to find.

You multiply the width with the length.

A cube is 3-dimensional.

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75% 3/4 chance of it being square. 25% 1/4 change of it being round.

Water molecules are smaller than alcohol ones. Water ones can fit between alcohol ones. Fill a container with pure alcohol to the top and add water. A certain amount will go into the container and not cause it to overflow.

echo sounder is the most recommended.

Density is mass divided by volume, so you just divide.

94

668 + 489 = 1157.

5

6

Minimum opf 165.3 days, depending on the

straightness or curvature of the route.

Depends on what you are looking for.

At a quick guess, you might be looking for the formula for figuring out the FORCE required for acceleration, or deacceleration.

Force = mass * acceleration

Force is given in Newtons

Mass is given in Kg

Acceleration is given in m/second^2

So, if YOU have a mass of 45 Kg, and gravity is 9.8m/sec^2, you are exerting a force of 441 Newtons on the surface you are standing on.

It is: 3

A "unit of area" has no mass (it has no volume).

Apparently this was developed by Gottfried Leibniz. Ancient Egyptians already used some of the ideas of binary numbers.

It is: 200/2 = 100

An octohedron has eight faces, all of which are triangles.

The same way you would write one.

it's a shape that has height, like a cube. and a cone.

In geometry, a solid shape is a shape with (X), (Y), (Z) angles, which are height, length, and width (i don't know which order they go in). A cube is like a die, which has 6 sides, 8 corners and 12 lines. A cone is like a waffle cone, which only has 2 sides, one point and one never ending line. A square pyramid is like an Egyptian pyramid, which has 5 sides, 5 corners and 8 lines. A sphere is like a ball, which has no sides, corners or lines. A rectangular prism is similar to a cube but is wider, similar to a tower, or a brick.