Top new questions this week:
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Here is an example of what I am referring to. This bridge is part of the Tom Moreland Interchange in Atlanta, more commonly known as “Spaghetti Junction”. This interchange has several …
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I was looking at two cars that friends have, and I was comparing the specs, and don’t understand what is going on. One is a 2017 7 seater Citroën C4, which has a 1.2L 3-cylinder petrol engine, …
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I have a 15 inch (381 mm) shaft with 24.95 mm diameter. That shaft is attached with a gearbox (ratio 5:1). The gearbox is driven by a motor (rpm 2750). There is one UC bearing and mechanical seal and …
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I have a plastic tank in my garden to collect rainwater. It is general purpose IBC container (en.wikipedia.org/wiki/Intermediate_bulk_container). The tank itself is made of plastic, within a …
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I am a beginner at freecad and I have created a protective case to carry AA batteries in my backpack. Unfortunately, after 3D printing I realized some of its corners are alarmingly pointy. I know I …
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I’m trying to create a PCB footprint for this part, but I’m not familiar enough with dimensioning to fully understand the diagram. Usually dimensions like D and E are specified as minimum and maximum …
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In many places, including but not limited to the Wikipedia page about PID controllers, I see the following PID coefficients: $K_P = 0.6K_U$, $K_I = 1.2 K_U / T_U$, and $K_D = 0.075 K_UT_U$. When were …
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Greatest hits from previous weeks:
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In this question , I dont understand why the KBC is 4EI / L …. I was told that for the far end pinned or roller supported , the K = 3EI / L , so shouldn’t the KBC = 3EI / L In the 3rd photo , we …
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I have a 2 mm thick steel plate which is 300 mm long and 30 mm wide, supported at either end. It supports a weight-bearing wheel that can roll along the plate. It currently supports the maximum weight …
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I thought my electric car charging unit uses 6.6 kW of power. However, I found the label and it actually says 6.6 kVA. When I saw this I thought something along the lines of… Well, $ P=…
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While watching the train videos, I came across these overhead wires. After searching on the internet, I found that both catenary and contact wires carry the same voltage and are connected by vertical …
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We have a simple class 1 lever: $$\begin {array}{c} \text {5,000 kg} \\ \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \…
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I tried to deliver a refrigerator and the customer saw that the refrigerator was lying down in the truck instead of standing up. He refused to accept it, claiming that the compressor would be damaged …
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The image below shows a style of fence that I’ve seen frequently around train tracks. If you look closely, you will see that between the third and fifth horizontal wire from the top, the vertical …
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