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### Time Conversions

Posted: Wed Mar 13, 2019 9:22 pm
For [A]=[A]oe^-kt, there seems to always be conversions associated with the -kt and time, do you convert the k or the t to equal the same units (minutes, seconds, hours) as one another?

### Re: Time Conversions

Posted: Wed Mar 13, 2019 9:30 pm
Use the appropritate time conversions: 1 hr is 60 mins, 60 secs in 1 min, 24 hr in day, etc.Set up diagonal conversions to cancel units out and end in whatever time unit you need.

### Re: Time Conversions

Posted: Wed Mar 13, 2019 10:21 pm
Yes, just make sure that your units are consistent.

### Re: Time Conversions

Posted: Wed Mar 13, 2019 10:53 pm
if your k is in min^-1 and your t is in seconds then what do you do?

### Re: Time Conversions

Posted: Wed Mar 13, 2019 11:30 pm
Mya Majewski 1L wrote:if your k is in min^-1 and your t is in seconds then what do you do?

You can convert either one as long as it matches/is consistent with the other. You should try to see if the question specifies in what units it wants the answer.

### Re: Time Conversions

Posted: Thu Mar 14, 2019 1:36 am
always use the units that the question initially gives you unless stated otherwise. so yeah convert everything to one type of unit. and don't forget conversions between kJ and J (unrelated sidenote)

### Re: Time Conversions

Posted: Sun Mar 17, 2019 10:55 am
You can use any time unit as long as the same time unit is used for all values in the problem.

### Re: Time Conversions

Posted: Fri Mar 06, 2020 11:10 pm
So, it doesn't matter seconds or minutes as long as you have all the same units.

### Re: Time Conversions

Posted: Fri Mar 06, 2020 11:25 pm
both should have the same units. it does not really matter what unit it is as long as units match

### Re: Time Conversions

Posted: Sun Mar 08, 2020 6:35 pm
The units should be the same so that they will cancel out when doing calculations. Also, sometimes, the question will ask for the answer in a particular unit.