Path: csiph.com!news.fcku.it!peer04.fr7!futter-mich.highwinds-media.com!news.highwinds-media.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Sylvia Else Newsgroups: sci.physics Subject: Re: Calculating G Date: Fri, 30 Dec 2016 13:22:38 +1100 Lines: 33 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: individual.net MGjPS7HdtwBs56tn/fu+9wKhUVGsdaScTNlMwQeHzH9BMONlva Cancel-Lock: sha1:EHtNaHkWhFTzGmpiK5IaUsxmXn0= User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 In-Reply-To: X-Received-Bytes: 1972 X-Received-Body-CRC: 3728751607 Xref: csiph.com sci.physics:610828 On 29/12/2016 11:21 PM, Peter Riedt wrote: > On Thursday, December 29, 2016 at 2:21:38 PM UTC+8, Sylvia Else > wrote: >> On 29/12/2016 1:13 AM, Peter Riedt wrote: >>> Calculating G >>> >>> The constant G was anticipated by Newton but first accurately >>> determined in the laboratory by Henry Cavendish in 1798. It has >>> the value G=6.674E-11m3kg−1s−2 (cubic meters per kilogram second >>> squared). >>> >>> G can be derived from elements of a star by the formula >>> G=gstar*rstar^2/Mstar >>> >>> gstar rstar Mstar G Sun 273.97 696,000,000 1.99E+30 >>> 6.674E-11 ACa 200.18 853,992,000 2.19E+30 6.674E-11 ACb 332.10 >>> 602,040,000 1.80E+30 6.674E-11 AC c 1695.00 98,136,000 >>> 2.45E+29 6.674E-11 >>> >>> gstar = surface acceleration in m/sec rstar = radius in m Mstar = >>> mass in kg >> >> How are you going to get the mass and surface acceleration of the >> star? >> >> Sylvia. > > I got the mass of the sun and Alpha Centauri A, B, C from sources > available on the Internet: Are you for real? How do you think they ended up on the Internet? Sylvia.