A steel Railway track in kaduna has a length of 27 metres when temperature is 35° Celsius a. what is the length on the Third Day when the temperature is 44 degree celsius
B. suppose the track is held firmly to the ground so that it cant expand 10 as stress result in the track due to the temperature change take young modulus of Steel as 2.0 x 10 1m square and coefficient of linear expansion of Steel as 1.1×10-³⁰c

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

frequency or wavelenth of em radiation in a vacuum

answerscientific theory;