## u0860867 2 years ago urgent help needed pls help

1. u0860867

2. UnkleRhaukus

is uninhibited decay the same as exponential decay ?

3. u0860867

i am not sure @UnkleRhaukus

4. UnkleRhaukus

$\big[\text{NaCl}\big](t) = \big[\text{NaCl}\big]_0e^{-t/\tau}$

5. UnkleRhaukus

$\frac{\big[\text{NaCl}\big](t)}{\big[\text{NaCl}\big]_0} = e^{-t/\tau}\\ \ln\tfrac{\big[\text{NaCl}\big](t)}{\big[\text{NaCl}\big]_0} = -t/\tau\\ \tau\ln\tfrac{\big[\text{NaCl}\big]_0}{\big[\text{NaCl}\big](t)} = t\\\tau = \frac t{\ln\tfrac{\big[\text{NaCl}\big]_0}{\big[\text{NaCl}\big](t)}}$

6. UnkleRhaukus

what do you think?

7. u0860867

@UnkleRhaukus i don't get what u wrote

8. UnkleRhaukus

any of it?

9. UnkleRhaukus

do you know where i got the original equation from ?

10. Mertsj

$A=A _{0}e ^{-kt}$

11. u0860867

@UnkleRhaukus pls could u help with this question

12. Mertsj

tangent negative, sin positive puts you in quadrant II

13. Mertsj

|dw:1367156027644:dw|

14. u0860867

@UnkleRhaukus for the above question pls can u draw the equation because the equation u wrote is in wierd computer language form its really urgent pls help thanks

15. UnkleRhaukus

16. UnkleRhaukus

i found $\tau=\tfrac1k\sim1 \text{day}$

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