How fast are we traveling around the galaxy?

[kens]

heya all, i need some help on a homework question.

Here is the question--
We are located about 28000 light-years from the galactic center and we orbit the center once every 230 million years. How fast are we traveling around the galaxy? Give your answer in both km/hr and mi/hr.

Okay, i know that we are trying to find the Speed.
So speed = distance/time.

so, 28000LYR/230 millions years = speed km

my question is, since i know that 1LYR= 9.5x10^12 km,
how do i change the 230 million years to km?... so i can do the problem?

thanks.

 

[Gokul43201]

heya all, i need some help on a homework question.

Henceforth, post your homework questions in the Homework & coursework subform (this would go in Intro Physics).

Here is the question--
We are located about 28000 light-years from the galactic center and we orbit the center once every 230 million years. How fast are we traveling around the galaxy? Give your answer in both km/hr and mi/hr.

Okay, i know that we are trying to find the Speed.
So speed = distance/time.

What distance is this? What does it mean when it says we are orbiting the galactic center?

so, 28000LYR/230 millions years = speed km

Read the question again. What are the units for speed that are specified in the question? km is a unit of distance, so it can not be a unit for speed as well. I suggest you go over the chapter on units carefully, to make sure you understand how they work.