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# natural log watch

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1. ok i know this will be easy for many of you maths bods, but whats
e^(-kt ln m)

is it m^-kt ? if so ive got the wrong answer lol
2. (Original post by edders)
ok i know this will be easy for many of you maths bods, but whats
e^(-kt ln m)

is it m^-kt ? if so ive got the wrong answer lol
yes it is, but where is the integration? you had my hopes up!
3. (Original post by elpaw)
yes it is, but where is the integration? you had my hopes up!
lol oh yeah good point... thats the result of an integration.
4. this is the source of the problem i think...

int -k [(1/m) dt]

is it -k[t ln m ]
5. (Original post by edders)
this is the source of the problem i think...

int -k [(1/m) dt]

is it -k[t ln m ]
no, it is just -k t/m (unless m is a function of t, which would make it more complicated)
6. (Original post by edders)
this is the source of the problem i think...

int -k [(1/m) dt]

is it -k[t ln m ]
Why have you integrated with respect to m?

Ben
7. (Original post by Ben.S.)
Why have you integrated with respect to m?

Ben
because im ignorant?
8. it's reading threads like this that i panic that i've applied for a degree that's half maths...

lou xxx
9. (Original post by lou p lou)
it's reading threads like this that i panic that i've applied for a degree that's half maths...

lou xxx
have you done AS/are doing A2 lou?
10. (Original post by elpaw)
no, it is just -k t/m (unless m is a function of t, which would make it more complicated)
so when youre integrating stuff, you just do the stuff its wrt... ignoring the other variables?
11. (Original post by edders)
so when youre integrating stuff, you just do the stuff its wrt... ignoring the other variables?
yes, that is why they are called constants. (if i didn't know any better, i could swear maskall has hacked into your account....., you're starting to sound like him)
12. (Original post by elpaw)
yes, that is why they are called constants. (if i didn't know any better, i could swear maskall has hacked into your account....., you're starting to sound like him)
i didnt use the word constant, i said variable 'ignore the other variables' m is a variable in this case
13. (Original post by edders)
i didnt use the word constant, i said variable 'ignore the other variables' m is a variable in this case
it depends on if the variable is dependent on the w.r.t, or if it is independent (which is otherwise known as a constant).
14. (Original post by edders)
ok i know this will be easy for many of you maths bods, but whats
e^(-kt ln m)

is it m^-kt ? if so ive got the wrong answer lol
e^(-kt ln m)=(e^ln m)^-kt=m^-kt

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