• Jan 30th 2010, 03:39 PM
princesasabella
Your planet has a circumference of 44032 miles at the .918 latitude North. If it takes 2.5 earth days (24 hour days) for your planet to complete one rotation then determine the following:

I got the radius its 7007.910 miles. Now its asking for the circumference of the equator. How do I find the circumference of the equator? Oh yes this is my first trig. class so I'm not advanced or anything. Thanks!
• Jan 30th 2010, 03:40 PM
VonNemo19
Quote:

Originally Posted by princesasabella
Your planet has a circumference of 44032 miles at the .918 latitude North. If it takes 2.5 earth days (24 hour days) for your planet to complete one rotation then determine the following:

I got the radius its 7007.910 miles. Now its asking for the circumference of the equator. How do I find the circumference of the equator? Oh yes this is my first trig. class so I'm not advanced or anything. Thanks!

$C=2\pi{r}$
• Jan 30th 2010, 04:12 PM
princesasabella
Oh thanks VonNemo19, sorry I wasn't paying attention I could have figured that out. I have to find the angular velocity at the latitude how do I do that? I got .160 for the latitude in radians. Its supposed to be in radians/earth hour.
• Jan 30th 2010, 04:33 PM
VonNemo19
Quote:

Originally Posted by princesasabella
Oh thanks VonNemo19, sorry I wasn't paying attention I could have figured that out. I have to find the angular velocity at the latitude how do I do that? I got .160 for the latitude in radians. Its supposed to be in radians/earth hour.

$\omega=\frac{\theta}{t}$

In your case $\omega=\frac{2\pi\mbox{rad}}{2.5(24)\mbox{hr}}$
• Jan 30th 2010, 04:45 PM
skeeter
Quote:

Originally Posted by princesasabella
Your planet has a circumference of 44032 miles at the .918 latitude North. If it takes 2.5 earth days (24 hour days) for your planet to complete one rotation then determine the following:
I have to find the angular velocity at the latitude how do I do that? I got .160 for the latitude in radians. Its supposed to be in radians/earth hour. Thanks in advance.

angular velocity is independent of latitude.