"If 9.46x10^12 km = 1 ly, how many kilometers are there in 1 ls?"
Use GRASS method, and explain the reasoning behind your steps so I can understand it; basically you're teaching me this because my teacher made some dumbass in our class teach this to us.
I will be honest with you, I'm not exactly sure about the "GRASS" method you are talking about, but I'll try to explain it as best as I can.
Since you are going from light years to light seconds, you will divide by 365 to obtain the length in km of one light-day, by 24 to obtain the length in km of one light-hour, and by 3600 to obtain the length in km of one light-second.
Therefore, 9.46*10^12/365/24/3600 = 3.00*10^5 km per light-second.
Hope it helps!
Leave it to an Aznboy right?Originally Posted by aznboy1997
I will be honest with you, I'm not exactly sure about the "GRASS" method you are talking about, but I'll try to explain it as best as I can.
Since you are going from light years to light seconds, you will divide by 365 to obtain the length in km of one light-day, by 24 to obtain the length in km of one light-hour, and by 3600 to obtain the length in km of one light-second.
Therefore, 9.46*10^12/365/24/3600 = 3.00*10^5 km per light-second.
Hope it helps!I was looking at it, but I was always horrible with conversions. Thanks for explanation though, I was also curious.
Maki (06-10-2013)
;____; I get 299,974.6322I will be honest with you, I'm not exactly sure about the "GRASS" method you are talking about, but I'll try to explain it as best as I can.
Since you are going from light years to light seconds, you will divide by 365 to obtain the length in km of one light-day, by 24 to obtain the length in km of one light-hour, and by 3600 to obtain the length in km of one light-second.
Therefore, 9.46*10^12/365/24/3600 = 3.00*10^5 km per light-second.
Hope it helps!
He rounded it up and put it into scientific notation.
I know I can look up how to turn stuff into scientific notation...but explain it to me?
You know what rounding is so I dont need to explain that
You got 299,974.6322 as your answer. It looks quite tedious and simplified it looks like:
2.999746322 x10^5
If you multiply those numbers^, you get your original answer. Teachers normally want it to two decimal points so:
2.99x10^5 (Same answer, just more simplified)
Teachers also usually want the answer rounded to which arrives you at aznboy's answer.
3.00x10^5
OHHHHHHHHH I get it!
Thanks!
What Bettser said.
Most high school problem sets advise you to answer to 2 decimal places (x.xx).
But to be more precise, look at the highest sig dig (aka sig figs) given in any # of the original problem. For instance, if a question throws out numbers like 2.34, 1.222, and 8.787777 in it, answer to 2 decimal places (2.34).
...and never use exponent "10^1" in scientific notation, because that's just "10". You'll likely get docked marks if you do, minimum in scientific notation is always "10^2", onwards.
---------- Post added at 05:28 PM ---------- Previous post was at 05:26 PM ----------
Are you following BEDMAS? Exponents first.Waittt though idgi
I got 299,974.6322
If I move the decimal 5 times to the left I get
29.99746322x10^5
10^5 = 100,000
2.99 * 100,000 = 299,000
aka 2.99 * 10^5
---
Never multiply your value by '10', then exponent it...remember BEDMAS.
Bettser (06-10-2013)
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