Recent content by marco75

Hi 256bits and Matterwave, thank you for the answers. The hot plate remain at 120°C indefinitely and the assumption of infinite plates cannot be made, because we have the following schema: an heater at 120°C has a size of 14cm x 7cm (hot plate) is faced to another aluminium plate (same size) at...

Hi davenn, many thanks for the answer. Yes, I understand what you say, but I would like to know a mathematical formulation, so we can suppose aluminium for both materials and choose some reflectivity, absorption and transmission values (I don't know if the correct analysis is obtained by means...

Hi, I would like to know what is the surface temperature of a material when it is radiated from another material at a certain distance. In other words: I have a material at 120°C (aluminium) and another parallel plate of area A faced to the first one at 10cm of distance. What is the surface...

Hi, 12A current can flow only into the 4ohm resistor (12V voltage source branch is "open") --> you find Vy. The same current can't flow into the 9A current generator, so can only flow into the 12ohm resistor -->you find I1 and Va. By adding (algebraic) Va and Vy you find Vx (KVL) and by...