How can [anything] have no temperature at all? Bwahahahahaha
When I begin at room temp [approx. 74F] I usually stir at about 5/8 to 3/4 of the device's capacity. The rpm's vary , depending on what mag mixer I use, and which stir bar. After about two minutes I begin lowering the rpm's to get a smooth blending action, and do it several times as the liquid heats and thins. In 30-40 minutes the temperature is usually around 104F-107F. I lower the rpm's again , to avoid heat increase, and let it run about 10 more minutes. The temperature(s) are simply created by friction [and molecular expansion].