Time Conversions


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Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

Time Conversions

Postby Mya Majewski 1L » 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?

Karan Thaker 2L
Posts: 75
Joined: Fri Sep 28, 2018 12:26 am

Re: Time Conversions

Postby Karan Thaker 2L » 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.

Yvonne Du
Posts: 64
Joined: Fri Sep 28, 2018 12:23 am

Re: Time Conversions

Postby Yvonne Du » Wed Mar 13, 2019 10:21 pm

Yes, just make sure that your units are consistent.

Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

Re: Time Conversions

Postby Mya Majewski 1L » 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?

805169754
Posts: 61
Joined: Fri Sep 28, 2018 12:19 am

Re: Time Conversions

Postby 805169754 » 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.

Ethan Breaux 2F
Posts: 63
Joined: Sat Sep 29, 2018 12:16 am

Re: Time Conversions

Postby Ethan Breaux 2F » 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)

Claudia Luong 4K
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Time Conversions

Postby Claudia Luong 4K » 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.

Abigail_Hagen2G
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

Re: Time Conversions

Postby Abigail_Hagen2G » Fri Mar 06, 2020 11:10 pm

So, it doesn't matter seconds or minutes as long as you have all the same units.

205405339
Posts: 77
Joined: Thu Jul 11, 2019 12:16 am

Re: Time Conversions

Postby 205405339 » 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

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Time Conversions

Postby kristi le 2F » 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.


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