HomeHome  CalendarCalendar  FAQFAQ  SearchSearch  MemberlistMemberlist  UsergroupsUsergroups  RegisterRegister  Log in  

Share | 
 

 8 inches per mile

View previous topic View next topic Go down 
AuthorMessage
NoCoPilot

avatar

Posts : 11422
Join date : 2013-01-16
Age : 63
Location : Seattle

PostSubject: 8 inches per mile   Mon Sep 11, 2017 8:25 pm

This is the rate of the earth's curvature.

I don't think I've ever seen it expressed this way before.
Back to top Go down
View user profile
_Howard
Admin
avatar

Posts : 7506
Join date : 2013-01-16
Age : 73
Location : California

PostSubject: Re: 8 inches per mile   Tue Sep 12, 2017 10:39 am

I haven't seen that one either. Here's another way of looking at it.

For an observer on the ground with eye level at h = 5 ft 7 in (1.70 m), the horizon is at a distance of 2.9 miles (4.7 km).

I would have thought it was much farther.
Back to top Go down
View user profile
NoCoPilot

avatar

Posts : 11422
Join date : 2013-01-16
Age : 63
Location : Seattle

PostSubject: Re: 8 inches per mile   Tue Sep 12, 2017 10:49 am

With these simple mathematical tools one could pretty easily calculate the circumference of the earth, from watching a sailing ship of known height disappear over the horizon.
Back to top Go down
View user profile
Sponsored content




PostSubject: Re: 8 inches per mile   

Back to top Go down
 
8 inches per mile
View previous topic View next topic Back to top 
Page 1 of 1
 Similar topics
-
» 700+ oz Milk available for donation NM (90 miles north of El Paso TX)
» Emmett Trapp, two-year-old Arizona boy found 1 mile from home.

Permissions in this forum:You cannot reply to topics in this forum
 :: Topics :: Science & Tech-
Jump to: