Conversions travel problem

  • Thread starter bigman8424
  • Start date
  • #1
25
0
how long, in months to 3 sig. figs, would it take someone traveling 27500 mi/hr to go 1.43*10^12 meters

plz help, i'm horrible at conversions
 

Answers and Replies

  • #2
dextercioby
Science Advisor
Homework Helper
Insights Author
13,002
552
What's the connection between time,speed and distance...?

Daniel.
 
  • #3
saltydog
Science Advisor
Homework Helper
1,582
3
Tell you what big dude, figure that one then figure how far light travels in one nanosecond. I'm guessing about 10 feet. You finish yours, then try and work on mine. I'll let a day go by and then post how I figured it out if you still haven't done so.
 
  • #4
saltydog
Science Advisor
Homework Helper
1,582
3
saltydog said:
Tell you what big dude, figure that one then figure how far light travels in one nanosecond. I'm guessing about 10 feet. You finish yours, then try and work on mine. I'll let a day go by and then post how I figured it out if you still haven't done so.
Oh yea, I didnt' forget: How far does light go in a nanometer:

The important thing to remember about conversions is to arrange the quotients so that the units cancel. That's the purpose of this exercise:

So we have:

[tex]\text{Speed of light: }\frac{186000\quad\text{miles}}{1\quad\text{second}}[/tex]

[tex]\text{feet in a mile:}\frac{5280\quad\text{feet}}{1\quad\text{mile}}[/tex]

[tex]\text{nanoseconds in a second:}\frac{10^9\quad\text{nanoseconds}}{1\quad\text{second}}[/tex]


So:

[tex]\frac{186000\quad\text{miles}}{1\quad\text{second}}*\frac{5280\quad\text{feet}}{1\quad\text{mile}}*\frac{1\quad\text{second}}{10^9\quad\text{nanoseconds}}[/tex]

Note how the units cancel leaving feet/nanosecond. It's about 1 foot. It's the same way with all the other conversion problems: Arrange the quotients so that the units cancel leaving you with what you want.
 

Related Threads on Conversions travel problem

  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
13
Views
2K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
3
Views
1K
Replies
1
Views
6K
Replies
1
Views
1K
Replies
1
Views
9K
Replies
1
Views
2K
Replies
3
Views
1K
Replies
1
Views
7K
Top