#video of a fake air conditioner for #cooling. The author pretends to use a 12-volt air pump connected to transparent push-on PVC tubes as a compressor to condense isobutane! #Fraud. By "The Liberty Engine Project". #Plonk.
#Cesar #video showing that the fake air conditioner for #cooling is a #fraud.
#paper about a “single-scale nomogram” by Richard K. Guy from 01953. The Mathematical Gazette, Vol. 37, No. 319 (Feb. 1953), p. 39, DOI: 10.2307/3609499. Using almost an #elliptic-curve and a straightedge to multiply, divide, and extract square roots. #Analog computation. The explanation of why it works uses elementary algebra: “Since the equation x³ + ax + b = 0 has zero for the sum of its roots, the x-coordinates of the three intersections of the line y = mx + c and the curve y = x³ + px + q add to zero.” #nomography #math