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I have sad news today

Several days ago, I lost my son Jefferson, who I love so much, who's missed by so many.

I want to say a few words about him below, if you could consider looking at, or just sharing the link here, it would help me a lot.
chuffed.org/project/helpje…
His mother, his sister, all his family, all his colleagues, all his friends have been shocked.
He's especially missed by those that took the time to know and understand him.
Jeff was only 23 when we lost him. He had so much more learning, living and giving to do. I the too short tome he was here, he gave his talent and spirit to world, a world that didn't always know how to accept those gifts.
Read 11 tweets
Wie viele #Meerschweinchen werden benötigt, um einen Heizlüfter zu ersetzen?

Ich wurde inspiriert durch folgende Darstellung von @quarkswdr.
Im folgenden 🧵 werde ich kurz erklären, wie ich das überschlagen habe.

Tl;dr: 858,3

#WissKomm


1/14
Um die Wärmeleistung \dot_Q eines einzelnen Meerschweinchens zu berechnen, nutze ich folgende Formel:

Wärmeleistung \dot_Q = Wärmeübergangskoeffizient alpha * Übergangsfläche A * Temperaturdifferenz \DELTA T

Wie komme ich an die benötigten Größen?

2/14
Fangen wir mit den einfachen Dingen an:
Zunächst mal nehme ich die Geometrie der Meerschweinchen als zylinderförmig an.

Die Übergangsfläche ist die Mantelfläche des Zylinders + 2 Mal die Querschnittsfläche
A=2*PI()*(d/2)^2+PI()*d*L

3/14
Read 17 tweets

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