You are an unique cricket umpire, Martin :-) What do you call ’the circle’ that decides the position of players in limited overs games?
> On 5 Aug 2021, at 9:41 pm, <[email protected]> > <[email protected]> wrote: > > I am a qualified cricket umpire. > > One of the questions for an umpire in the lower leagues (where we cannot ask > for a television replay or rely on microphones embedded in the stumps) is > whether a "click" from the ball as it passes the batsman was the ball hitting > the batsman's bat or pads. Given that sound travels at 300 m/s (I measured > it at 331 m/s in the laboratory as part of an undergraduate practical class) > tells me that it takes about 0.08 seconds for the sound to reach me (assuming > that I ma standing 6 or 7 metres behind the stumps). If the ball is > travelling at 40 m/s, then in that time it will travel about 3 metres. > Therefore, when the umpire hears the click, the ball will have travelled 3 > metres from where it was when the click was generated. Therefore, do not put > too much emphasis on the when the "click" happened. > > -----Original Message----- > From: Stephen Humphreys <[email protected]> > Sent: 05 August 2021 16:53 > To: Brian White <[email protected]> > Cc: [email protected]; USMA List Server <[email protected]> > Subject: Re: [USMA 1776] Re: Olympic Tennis Metrics > > I’m a member of a cricket club and play the game often. > > No one watches the ball each second TBF. Its all over by the time your > stumps are smashed. From batter to bowler its < 1s We are ‘aware’ of speed > so when we receive a 75mph ball (we cant get to international standard > speeds) you get a sense of the ball coming at you at motorway car speed. > Similarly there are spin bowlers who bowl [sometimes half that speed] much > slower but are hard to hit. ITs just something we’re use to. The speed > metric (excuse the pun) of mph is just something extremely familiar and is a > big part of the game. Metric countries would be familiar with what a 130 > km/h ball ‘feels’ like. > > We have a bowling machine where you set the speed before you release balls > in to it. As yet no-one has complained about the ‘hour’ bit being difficult > to judge due to time and some of the younger members are highly numerate. We > just associate it with something familiar as we stand as a target for the > ball. > >> On 5 Aug 2021, at 2:41 pm, Brian White <[email protected]> wrote: >> >> Your friend. >> >>> On Aug 5, 2021, at 02:11, [email protected] wrote: >>> >>> Those who are innumerate yes. Those who are highly numerate prefer the >>> metric system for its very simplicity. Those who want to extract a little >>> more information from the numbers, in the manner that I have described no. >>> Likewise, if I see leaves being blown by the wind, I can estimate how far >>> those leaves are going in one second, but not in one hour. >>> >>> Some years ago a friend and I were trying to estimate the diameter of a >>> sphere that contained 2000 ton(ne)s of water without resorting to pen, >>> paper or calculator. I made the assumption that one tonne of water has a >>> volume of one cubic metre. My friend made the assumption that one ton of >>> water is equal to 2240 pounds and that one cubic foot of water weighed 62.5 >>> pounds. Guess who got the answer first? >>> >>> -----Original Message----- >>> From: Brian White <[email protected]> >>> Sent: 04 August 2021 23:10 >>> To: [email protected] >>> Cc: Martin Morrison <[email protected]>; USMA List Server >>> <[email protected]> >>> Subject: Re: [USMA 1771] Re: Olympic Tennis Metrics >>> >>> Bah. Everyone equates it to speed in a vehicle. Simple as that. >>> >>>> On Aug 4, 2021, at 16:16, [email protected] wrote: >>>> >>>> Quoting the speed of a tennis ball, baseball ball or cricket ball in km/h >>>> is not very helpful. Has anyone ever seen one of these balls travel for an >>>> hour. Using m/s makes for more sense. >>>> >>>> In baseball, the distance from the pitcher to the plate is 18.39 metres >>>> (or 60'6"). If the pitcher delivers the ball at a speed of 100 mph, how >>>> long does the batter have before the ball gets to him? If he pitches it >>>> at 44 m/s (the exact conversion is 44.69444), it is easy to see that he >>>> batter will have about 0.4 s (18.39/44). >>>> >>>> Martin >>>> >>>> -----Original Message----- >>>> From: USMA <[email protected]> On Behalf Of >>>> [email protected] >>>> Sent: 04 August 2021 21:58 >>>> To: USMA List Server <[email protected]> >>>> Subject: [USMA 1768] Olympic Tennis Metrics >>>> >>>> From an internet posting: "I'm a metric system enthusiast but the Olympic >>>> baseball broadcast is displaying pitch speed in km/h, and I am grateful >>>> that our stupid measurement system happens to work out so that "100 = A >>>> Very Fast Pitch." >>>> >>>> Actually, I have seen pitch speed in km/h for Wimbledon, and, I think, the >>>> French Open, etc. >>>> >>>> _______________________________________________ >>>> USMA mailing list >>>> [email protected] >>>> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Femea01.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Fl&data=04%7C01%7Cusma%40lists.colostate.edu%7Cd788d45e369e4c729a6408d9585f32b0%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637637988619889229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3fVuTQWB7Q0wy2h48Y0EFPMeQzsucR5ZiueY5dlFR8g%3D&reserved=0 >>>> ists.colostate.edu%2Fcgi-bin%2Fmailman%2Flistinfo%2Fusma&data=04 >>>> %7C01%7C%7C6aca3e30f5d748bac27408d95816c187%7C84df9e7fe9f640afb435aa >>>> aaaaaaaaaa%7C1%7C0%7C637637677038159468%7CUnknown%7CTWFpbGZsb3d8eyJW >>>> IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C100 >>>> 0&sdata=oyfXCvMeT3xkleaIic%2FiELAU0OykPl88RncgNUGj54Q%3D&res >>>> erved=0 >>>> >>>> _______________________________________________ >>>> USMA mailing list >>>> [email protected] >>>> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Femea01.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Fl&data=04%7C01%7Cusma%40lists.colostate.edu%7Cd788d45e369e4c729a6408d9585f32b0%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637637988619889229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=3fVuTQWB7Q0wy2h48Y0EFPMeQzsucR5ZiueY5dlFR8g%3D&reserved=0 >>>> ists.colostate.edu%2Fcgi-bin%2Fmailman%2Flistinfo%2Fusma&data=04 >>>> %7C01%7C%7C6aca3e30f5d748bac27408d95816c187%7C84df9e7fe9f640afb435aa >>>> aaaaaaaaaa%7C1%7C0%7C637637677038159468%7CUnknown%7CTWFpbGZsb3d8eyJW >>>> IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C100 >>>> 0&sdata=oyfXCvMeT3xkleaIic%2FiELAU0OykPl88RncgNUGj54Q%3D&res >>>> erved=0 >>> >> >> _______________________________________________ >> USMA mailing list >> [email protected] >> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Femea01.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Flis&data=04%7C01%7Cusma%40lists.colostate.edu%7Cd788d45e369e4c729a6408d9585f32b0%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637637988619889229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=dBFjkMd2GYpsc%2FT8facCx5VS%2BeyE4uYBQ2yo%2FP7xxzA%3D&reserved=0 >> ts.colostate.edu%2Fcgi-bin%2Fmailman%2Flistinfo%2Fusma&data=04%7C0 >> 1%7C%7C6aca3e30f5d748bac27408d95816c187%7C84df9e7fe9f640afb435aaaaaaaa >> aaaa%7C1%7C0%7C637637677038159468%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4w >> LjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdat >> a=oyfXCvMeT3xkleaIic%2FiELAU0OykPl88RncgNUGj54Q%3D&reserved=0 > _______________________________________________ USMA mailing list [email protected] https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma
