tag:blogger.com,1999:blog-7478606652950905956.post2582481823682454319..comments2024-03-18T22:50:29.792-07:00Comments on Cliff Mass Weather Blog: How does a straw really work?Cliff Mass Weather Bloghttp://www.blogger.com/profile/13948649423540350788noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-7478606652950905956.post-56878078891518307362020-09-23T18:00:29.019-07:002020-09-23T18:00:29.019-07:00It is not accurate to state that no pump is capabl...It is not accurate to state that no pump is capable of suctioning water to a height greater than about 30 feet. Some mechanical pumps use rotary and/or piston action with cycling (open/close) inlet and outlet valves, and such a mechanical function only requires that the power source be sufficient to overcome the variable forces of friction, weight (of the water), water mass inertia, and the arbitrarily defined open/close pressure thresholds (such as coil spring forces, etc.).<br /><br />As such, some pumps (positive displacement pumps) can push or pull water hundreds of feet vertically.<br />Anonymoushttps://www.blogger.com/profile/15097310302744756284noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-20701364444694172932017-10-07T21:31:22.905-07:002017-10-07T21:31:22.905-07:00Cliff: I assume you’re aware that your app has qui...Cliff: I assume you’re aware that your app has quit working on Apple devices since IOS 11 was launched. Mr Federalehttps://www.blogger.com/profile/09660122983424708562noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-13081428664525612182017-10-06T05:28:56.219-07:002017-10-06T05:28:56.219-07:00I will never forget my college chemistry professor...I will never forget my college chemistry professor's saying. "Nothing can't do nothing"... Meaning the vacuum doesn't do the lifting, it is atmospheric pressure that does it. Somebodyhttps://www.blogger.com/profile/14024443041518305326noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-60747778024148952222017-10-06T05:25:18.266-07:002017-10-06T05:25:18.266-07:00Trees use osmosis and water's affinity for sug...Trees use osmosis and water's affinity for sugar to lift water much higher. The forces involved with that are surprisingly powerful. Yes powerful enough to lift water to the top of Redwood trees. Somebodyhttps://www.blogger.com/profile/14024443041518305326noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-86303817634180652462017-10-04T19:57:05.879-07:002017-10-04T19:57:05.879-07:00Next question: How do trees suck water up much hig...Next question: How do trees suck water up much higher than 30 feet? It was only recently discovered!Erichttps://www.blogger.com/profile/13478580459201630902noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-88599117863351731562017-10-01T10:19:00.785-07:002017-10-01T10:19:00.785-07:00The science is settled - humans could draw more li...The science is settled - humans could draw more liquid into straws if AGW hadn't occurred. If we don't act now to halt it no one will be able to draw liquids into a straw in the first place. Eric Blairhttps://www.blogger.com/profile/09376653214948517679noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-90208710434368271172017-10-01T03:14:27.135-07:002017-10-01T03:14:27.135-07:00Cliff wrote, "The insightful among you would ...Cliff wrote, "The insightful among you would note that the fluid in the straw has weight ... "<br /><br />The fluid in the straw has mass. Weight is a measure of the force of mutual attraction (gravity) between the earth and the fluid. This may sound pedantic but it is important that university students know and understand the difference. They should have learned this in high school.<br />typingtalkerhttps://www.blogger.com/profile/09572305719782041883noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-70373883377205648002017-09-30T22:51:24.727-07:002017-09-30T22:51:24.727-07:00... not that anyone is interested in such long str...<i>... not that anyone is interested in such long straws!</i><br /><br />Ah, but there are crazy folk who are! Derek Muller, the host of the You Tube channel Veritasium, <a href="https://www.youtube.com/watch?v=HUmZrtiXDik" rel="nofollow">explored this</a>. Though, of course, he does it in SI rather than our strange units. :-)<br /><br />He follows up with the question: <a href="https://www.youtube.com/watch?v=BickMFHAZR0" rel="nofollow">How can a tree be taller than 10.3m?</a> I don't want to spoil the answer here, but it's surprisingly complex (and I have to admit that I don't have a decent grasp on the mechanics).David Cuthberthttps://www.blogger.com/profile/09877408767778945901noreply@blogger.comtag:blogger.com,1999:blog-7478606652950905956.post-66498285849981446582017-09-30T18:53:00.863-07:002017-09-30T18:53:00.863-07:00The first time she uses her diaphragm to generate ...The first time she uses her diaphragm to generate the suction, she'll inhale water, cough miserably for several minutes, and learn to generate suction by expanding her cheeks, instead... #pedantdafyddhttps://www.blogger.com/profile/00882404668046310010noreply@blogger.com