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April 19, 2015

Posted by **aira** on Tuesday, May 13, 2014 at 5:23pm.

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 5:33pm1 year=365 days

365 + 47=412 days total

412 days*(24hours/1 day)= 9,888 hours

9,888 hours + 2 hours=9,890 hours total

9,890 hours total*(60 min/1 hour)*(60 sec/1 min)= total time in seconds

3.00 x 10^8 m/s*total time in seconds= distance in meters

distance in meters*(1 kilometer/1,000m)= distance in kilometers

- chemistry -
**aira**, Tuesday, May 13, 2014 at 5:41pm9,890 hours total*(60 min/1 hour)*(60 sec/1 min)= total time in seconds

is 35,604, 000 right?

- chemistry-aira -
**Devron**, Tuesday, May 13, 2014 at 5:44pmYes, 35,604,000 seconds, but what do you do with it once you have found the time that it takes in seconds?

- chemistry -
**aira**, Tuesday, May 13, 2014 at 5:47pmI multiply 35,604,000 by 3.00 x 10^8 to find out the distance in meters?

which gives me 1.06812e+16??

is that right?

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 5:47pmYou will get an answer that is very large, so you will have to use scientific notation. Report no more then 3 significant figures.

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 5:48pmYes, but only three significant figures. So, a number, decimal followed by two more numbers.

- chemistry -
**aira**, Tuesday, May 13, 2014 at 5:54pmso it will look like this :

distance in meters (1.06)*(1 kilometer/1,000m) = distance in kilometers

-> 0.00106 is the final answer?

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 5:56pmNo, 1.06812e+16 is correct. But you are only suppose to report three significant figures: 1.07 e+16

- chemistry -
**aira**, Tuesday, May 13, 2014 at 6:02pmyeah, but I'm very confused on how to get the final answer. Do i take 1.07e+16 and multiply it by a thousand to get km?

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 6:07pmNo. 1.07 x 10^16 is in meters; you have to take the whole thing and divide it by 1,000, not just 1.07.

So, 1.07 x 10^16 m*(1km/1,000m)= your answer in Km

****Notice how the m's cancel and you are only left with km.

The FINAL ANSWER SHOUD BE 1.07 x 10^13

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 6:10pm1,000meters=1km

So, you have to make this relationship a fraction.

1,000m/1km.

But how do I organize it in a way that meters goes away and kilometers remain?

(1km/1000m)

So if I multiply the ration this way, by my intermediate answer that is in meters, then the meters cross cancel and you are only left with meters.

I hope this makes more since.

- chemistry -
**aira**, Tuesday, May 13, 2014 at 6:11pmI GOT IT. thank you so much !! best tutor out here

- chemistry -
**Devron**, Tuesday, May 13, 2014 at 6:15pmYou are too nice. At least you can understand my typos. When I help others on another forum, I can edit my answers, so I do not look like an idiot, but on this forum I can not.

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