Hydraulic Car Jack Help: Answering a Question on Hydraulics | PDF Attached

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A user seeks assistance with a hydraulics question related to a hydraulic car jack, having partially answered the first part but struggling with the second. They attached a PDF for reference but expressed uncertainty about the accuracy of their response. The user also inquired about how to post images directly in the forum to avoid future attachment issues. They mentioned a preference for older forums for accessing important information, which they find challenging with current image hosting practices. The post aims to provide valuable insights for future readers.
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I've attached a PDF with a question related to hydraulics. I've answered (not sure if it was correctly) the first part of the question, but not sure where to start on the second.

Thank you for any help.

p.s. sorry for it being in PDF format. If someone is able to tell me how I can directly post images in my post, I'll start doing that.
 

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No attachment here.
 
Upload your images to site like imageshack and then paste the 'forum' link.
 
Somethng must be wrong with me with all these missing attachments today. I blame it on the invention of tabs (current count 64).
 
Thank you rock.freak667, but I'm use to going to an old forum to find the important information needed, contained in an image deleted on a image hosting site.

Hopefully this post will help others for generations to come. :smile:
 
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TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
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Thread 'Trying to understand the logic behind adding vectors with an angle between them'

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My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
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