and heat a cup of green tea
So, here's today's Assignment for you guys to solve.
There is a very strong radiation source in the center of a large 120 x 120 foot room. A person must run through this room to get to safety. Her escape route takes her the full lenth along one wall of the room. She is not exposed to radiation outside the room. The strength of the radiation is inversely proprtional to the square of her distance from the source. At 5- feet, her body is absorbing radiation at the rate of 200 un**** per second. If she runs at 12 feet per second, what is the tottal radiation dose she recieves during her dash to safety?
You must show the integral used to solve problem.
www.KaRealtySF.com
Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip
and heat a cup of green tea
Vee ave vays of dealing vid your kind...........
haha...cmon, where are the mechanical/civil engineers on the board?
www.KaRealtySF.com
Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip
Oy! Yer just trying to get someone to do your homework assignment for you, aren't you?
Not DO it...just HELP. hahaha.
www.KaRealtySF.com
Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip
Yes there are mech engineers on the board, but speaking for myself i finished university so that i would never have to do stuff like that again......... but I'll see what i can come up with
Germans: Why can't they make everything?
okay dokey
R = rate of rad absorption (units/sec)
x = distance from the source (feet)
k = constant
now R = k/(x^2)
so 200 units/s = k/(5^2)
therefore k = 5000
now in order to solve this you need to find the total units of rad she absorbed
so that will be the Integral of R with respect to time
you will need to find an expression for the distance with respect to time.
that is to say x= f(t)
probably some kind of parabola
then you will find the Integral of k/(x^2) with respect to time
ie integral of 5000/(f(t)^2) with respect to time
you bastard, the horrible memories are flowing back...... nooooooo
edit: the expression for x is something like x = sqrt((60-ut)^2+60^2)
where sqrt is the square root and u is the chick's velocity
Last edited by rob101; 03-15-2006 at 08:23 PM.
Germans: Why can't they make everything?
10.9 units
Originally Posted by liquidtiger720
Last edited by Bellicose Right Winger; 03-15-2006 at 08:22 PM.
.....Got to keep the loonies on the paath.
i just noticed a type while going through the proble....5- is suppose ot be 50. But I think I can manage. Thank you everybody for the well needed boost. Rob and Bellicose, you deserve a cookie!.
sorry to bring back bad memories rob!
Last edited by liquidtiger720; 03-15-2006 at 08:35 PM.
www.KaRealtySF.com
Build Date: 05-1995 /Engine: m50tu /Automatic Transmission /ABS /NO ASC /Open Differential /EAT Chip
integral is "*&*^%%^$(]}@{" - without the ""s
the answer is 6
95 E34 530I V2.31
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