Substances with an ionic crystal lattice are NaBr (sodium bromide), CaCl2 (calcium chloride), Na2S (sodium sulfide), NaOH (sodium hydroxide). (They also have an ionic bond).
The heating temperature of the heat engine is +127 degrees, and the temperature of the refrigerator is +31 degrees. During one cycle, the working fluid of the engine
If the Ox axis is directed towards the F1 force, the resultant of these forces, without taking into account the friction force, and the support reaction force is