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## Calculate ideal unloaded rotor speed

I have the following problem: MY ATTEMPT Okay, I’ve found two formulas that will definitely help me solve this problem: The first is \$S=\frac{N_s-N}{N_s} \$, where \$S\$ is the slip, \$N_s\$ is the synchronous speed, and \$N\$ is the rotor-speed. The second formula is \$N_s=\frac{120f}{P}\$, where \$f\$ is the frequency and \$P\$ is […]

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## Social Distancing Groups at Beaches and similar large venues

Government agencies (for this conversation, assume USA) have provided guidance to prevent COVID-19 transmission. As it is a holiday, many lockdown weary have flocked to the beaches and similar venues. Assume that compliance with guidance is perfect. From a infection transmission perspective: Does it make sense to require groups be limited to people that live […]

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## How to convert a unit vector to quaternion for look-at functionality?

So far I got this: local function fromTo(v1, v2) local a = Vector3.new() local xAxis = Vector3.new(1,0,0) local yAxis = Vector3.new(0,1,0) local dot = v1:Dot(v2) if (dot < -0.999999) then a = xAxis:Cross(v1) if (a.Magnitude < 0.000001) then a = yAxis:Cross(v1) end a = a.Unit return CFrame.fromAxisAngle(a, math.pi) elseif (dot > 0.999999) then return CFrame.new() […]

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## Cleanest way to delete the intersection’s unnecessary parts in Blender?

I’ve created a straight half tube model, and I’d like to combine 2 of them, to make a cross shaped tube. How could I remove the intersection’s unnecessary parts to make the cross shape look… normal?

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## Is duplicating “short cut” foreign keys a good idea to avoid multiple joins?

I have 3 tables A, B and C. C belongs to B, and B belongs to A. 1 entity of A can have 0 or various entities of B, 1 entity of B can have 0 or various entities of C. 1 entity of C has 1 entity of B, and 1 entity of B […]

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## Is ‘data corruption occurs in the clustered index’ still open?

Based on sp_Blitz Result: DBCC CHECKDB Not Run Recently, there is a reported bug in SQL Server 2012 & 2014, Data corruption occurs in the clustered index when you run online index rebuild in SQL Serve, is it still an open issue in Azure SQL Server 2019? How can I investigate it?

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## I have a question : coming from my latest interview: On Always on readable secondary

I was asked that if a user has to be connected to secondary replica of always on 2 node environment how will we access to read only requests to secondary and we don’t want to let the user access primary and only use secondary for read requests without using listener connection string. I am not […]

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## What are the benefits of using Manual Failover Mode in an AlwaysOn Availability Group instance as opposed to Automatic Failover Mode?

Why wouldn’t I want to use Automatic Failover as the Failover Mode for an AlwaysOn Availabiltiy Group instance? Are there pros for Manual Failover Mode that don’t exist for Automatic Failover Mode?

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## Do nightclub technitians generate value more efficient after upgrading biker businesses?

Biker businesses like the weed farm can be upgraded to run more efficient by quicker generation of products from resupply, generating more units of products from units of each unit of resupply and raising the worth of each unit of products. At least that’s how I understand the in game description of the upgrades. That […]

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## Is there a way to stop my helmet from destroying my skin in minecraft?

I recently purchased a cool skin in minecraft. However, the skin has a head covering that, like many modern skins, has extensions on it. When I put on a helmet, these extensions are deleted, leaving my character’s face as a weird flat grey blob beneath the helmet. I tried downloading a texture pack that makes […]