2007-03-04 02:15:06 · 6 answers · asked by gwasserba 1 in Science & Mathematics ➔ Engineering
Egyptian pyramids were built using pi.
Many area, volumes and whole engineering is based on the calculation using pi.
Pl. visit:
http://www.ms.uky.edu/~lee/ma502/pi/MA502piproject.html
Simple Harmonic motion
simple Harmonic motion refers to the sinusoidal oscillation of an object or quantity
The time period for one oscillation of an object can be defined by the following equation
T = 2(pi)[sqrt(m/k)]
T= time period, m = mass of object, k = constant
Simple harmonic motion is just one example where pi appears in scientific calculation. However there are many more, here are a few examples:
- Coulomb's Law
- Einstein's Gravitational Field Equation
- Wave equations
- Equations to do with DNA
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3-d shapes(cylinder) - Volume, Lateral Area and Total Area
Volume
The volume of a cylinder equals the area of the circle of the cylinder multiplied by the height of the cylinder.
V = pi(r^2)h
Lateral Area (area without bases)
The lateral area of a cylinder equals the circumfernce of the circle of the cylinder multiplied by the height of the cylinder
lA = 2(pi)rh
Total Area
The total area of a cylinder equals the circumfernce of the circle of the cylinder multiplied by the height of the cylinder add twice the area of the circle
tA = 2(pi)r(h + r)
For example: if we have a cylinder with a circle of radius 6cm and a height of 20cm, what is its volume, lateral area and total area?
Solution: We take r=3 and h = 20 giving V = 720pi, lA = 240pi and tA= 312pi
The Volume of the cylinder approximately equals 2261.95cm^3
The lateral area of the cylinder approximately equals 753.98cm^2
The total area of the cylinder approximately equals 980.18cm^2)
Pl. visit:
http://people.bath.ac.uk/ad244/usingpi.html
2007-03-04 02:46:54 · answer #1 · answered by Anonymous · 4⤊ 1⤋
Finding the area of anything circular. Finding how much fencing is needed to enclose a circular field. Finding how much material is needed to make a soccer ball. Finding how much water can be held in a spherical water tank.
If it is round then pi is needed to do the arithmetic.
2007-03-04 12:41:02 · answer #2 · answered by Rich Z 7 · 0⤊ 0⤋
for circles
2 * pi * r = circumference
pi *r^2 = area
also with some basic calculus and integration you can find volumes of solids of revolution.
2007-03-04 02:25:18 · answer #3 · answered by thereytrain 2 · 0⤊ 0⤋
In Electrical and electronics engineering. Especially in electronics equipment that involves transmission of inforamtion whether it be voice, data, or video information. (Radio & television, ofcourse.) Good enough, yes?
2007-03-04 04:23:35 · answer #4 · answered by FILO 6 · 0⤊ 1⤋
to find are and circumference of circles
2007-03-04 02:22:51 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Hum, drawing circles?...
2007-03-04 02:21:51 · answer #6 · answered by gurlu 2 · 0⤊ 1⤋