I'm doing a project for school and I need examples of various functions applied in real life.
For example, growth of human population is exponential and relation between height, size of hands and size of feet is linear.
So, I need as many examples as I can get, possibly with some description and elaboration.
Thanks.
Apr-30-2008 16:53
Meat187
Diese scheiß Katze
Registered: Dec 2007
Location: The Night's Plutonian Shore
Refer to your user name.
Apr-30-2008 16:56
Dr. DAS
Gain Control
Registered: Nov 2006
Location: Raccoon City
quote:
Originally posted by Meat187
Refer to your user name.
Good catch!!
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Decibels are measured on a logarthmic scale.
83dB is actually the electrical double of 80dB. The more SPL you want, the more energy req'd to drive the transducers to move the increased volume of air.
Ahhh...the free flow of electrons. Makes me happy.
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Apr-30-2008 17:05
Gauss
^^
Registered: Oct 2004
Location:
quote:
Originally posted by Dr. DAS
Decibels are measured on a logarthmic scale.
83dB is actually the electrical double of 80dB. The more SPL you want, the more energy req'd to drive the transducers to move the increased volume of air.
Ahhh...the free flow of electrons. Makes me happy.
Nice, didn't know that. I'll look into it some more.
Apr-30-2008 17:09
Dervish
Your opinion matters.
Registered: Dec 2003
Location:
If you mount a piston to a wheel and measure the displacement of the piston as the wheel rotates you get a sine wave.
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Apr-30-2008 17:09
tubularbills
Max Power!
Registered: Apr 2003
Location: Middle of fucking nowhere
linear = line
exponential = not line
/thread
Apr-30-2008 17:12
GTS3gEclipse
Snatchblaster
Registered: Sep 2004
Location: Pensacola
My vehicle dynamics teacher showed us a project the kids the year before us did that proves that in order to make a lane change on the highway, your steering input is actually a perfect sine wave (if done perfectly). Also just about everything in your engine that moves is based on a sine function that is based on your crankshaft angle (theta). So your valve timing, piston position, etc. are all done base on equation that contains sin(theta) where theta is the crankshaft angle. I hope explained that clearly enough and didn't totally make myself out to be a nerd.
Last edited by GTS3gEclipse on Apr-30-2008 at 17:45
Apr-30-2008 17:31
Gauss
^^
Registered: Oct 2004
Location:
quote:
Originally posted by Dervish
If you mount a piston to a wheel and measure the displacement of the piston as the wheel rotates you get a sine wave.
Yeah... And the obvious one, alternating current.
quote:
Originally posted by tubularbills
linear = line
exponential = not line
/thread
Seriously, you're one of the most useless posters around here. Avoid my threads please... Thanks.
And exponential function is also a line, but not a straight one, dumbass.
quote:
Originally posted by GTS3gEclipse
My vehicle dynamics teacher showed us a project the kids the year before us did that proves that in order to make a lane change on the highway, your steering input is actually a perfect sine wave (if done perfectly). Also just about everything in your engine that moves is based on a sine function that is based on your crankshaft angle (theta). So your valve timing, piston position, etc. are all done base on equation that contains sin(theta) where theta is the crankshaft angle. I hope explained that clearly enough and didn't totally make myself out to be a nerd.
Hmm... Wouldn't intercepting a car in front of you make a sine wave?
Apr-30-2008 17:47
Meat187
Diese scheiß Katze
Registered: Dec 2007
Location: The Night's Plutonian Shore
If you grab a chain by the ends it forms a hyperbolic function (cosh(x)).
Pretty much everything in statistics. I was referring to the Gaußian Bell Curve in my first reply.
Also, check out fractals.
There's much more, but I'm to lazy to write it all down.
Apr-30-2008 17:57
GTS3gEclipse
Snatchblaster
Registered: Sep 2004
Location: Pensacola
quote:
Originally posted by Gauss
Hmm... Wouldn't intercepting a car in front of you make a sine wave?
no, that would make you oversteer and make a sine wave thats not symmetrical. try it. when you change a lane you steer your wheel left maybe an inch, then to straighten back out u steer back to the right a inch. if you go around a car you would steer the wheel left and inch and then back to the righy maybe 2 inches to get all the way back over.
Apr-30-2008 17:59
tubularbills
Max Power!
Registered: Apr 2003
Location: Middle of fucking nowhere
quote:
Originally posted by Gauss
Yeah... And the obvious one, alternating current.
Seriously, you're one of the most useless posters around here. Avoid my threads please... Thanks.
And exponential function is also a line, but not a straight one, dumbass.
a line, by definition, is the shortest distance between two points.
an exponential curve is not the shortest distance between two points. therefore, it is not a line. it is a curve.
you're the one who needs help on math, not me genius
Apr-30-2008 18:01
GTS3gEclipse
Snatchblaster
Registered: Sep 2004
Location: Pensacola
quote:
Originally posted by tubularbills
a line, by definition, is the shortest distance between two points.
No, that's a straight line. a line is defined by dictionary.com as: Mathematics: a continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point.
so exponential is still a line, just not a straight line.
