Results 1 to 2 of 2

Math Help - word problem

  1. #1
    Newbie
    Joined
    Mar 2009
    Posts
    2

    word problem

    the speed of light is 1.863 x 10^5 miles per second.

    assume 1 year is 365 days. write an expression to convert speed of light from miles per second to miles per year

    make a table that shows the distance light travels in 1, 10, 100, 1000, 10000, 100000 years. our galazy has a diameter of about 5.875 x 10^17 miles. based on the tablem about how long would it take for light to travel across our galaxy.

    i have no idea what to do. help
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Mar 2009
    Posts
    2
    Quote Originally Posted by math1645 View Post
    the speed of light is 1.863 x 10^5 miles per second.

    assume 1 year is 365 days. write an expression to convert speed of light from miles per second to miles per year

    make a table that shows the distance light travels in 1, 10, 100, 1000, 10000, 100000 years. our galazy has a diameter of about 5.875 x 10^17 miles. based on the tablem about how long would it take for light to travel across our galaxy.

    i have no idea what to do. help
    (1.863 * 10^5 miles / sec) * (60 sec / minute) * (60 minutes / hour) * (24 hours / day) * (365 days / year)

    Cancel out units.
    5.795 * 10^12 miles / year

    Create a table by multiplying years by the expression above
    Years Miles
    1___________5.795 * 10^12
    10__________5.795 * 10^13
    100_________5.795 * 10^14
    1000________5.795 * 10^15
    10000_______5.795 * 10^16
    100000______5.795 * 10^17

    With a diameter of about 5.875 x 10^17 miles and based on the table it would take light 100000 years to travel across our galaxy
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. word problem - the snow plough problem?
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: October 13th 2011, 02:02 PM
  2. Replies: 3
    Last Post: January 2nd 2011, 09:20 PM
  3. 1 Word problem and 1 function problem
    Posted in the Algebra Forum
    Replies: 8
    Last Post: April 21st 2010, 09:01 AM
  4. Replies: 2
    Last Post: January 10th 2009, 06:49 AM

Search Tags


/mathhelpforum @mathhelpforum