Asolid, insulating sphere of radius a has a uniform charge density of ρ and a total charge of q. concentric with this sphere is a conducting hollow sphere whose inner and outer radii are b and c, as shown in the figure below, with a charge of 4q. to specify all three of ρ, q and a is redundant, but is done here to make it easier to enter answers. what is q in terms of ρ and a? q = correct: your answer is correct. find the magnitude of the electric field in the following regions. r < a (use the following as necessary: ρ, ε0, and r.) e = incorrect: your answer is incorrect. a < r < b (use the following as necessary: q, ε0, π, and r.) e = b < r < c (use the following as necessary: q, ε0, π, and r.) e = r > c (use the following as necessary: q, ε0, π, and r.) e = determine the induced charge densities on the inner and outer surfaces of the hollow sphere. (use the following as necessary: q, ε0, π, a, b, and c.) inner surface σinner = outer surface σouter =

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).

answer:   you might love summer weather, but you don’t want it to feel like the sun is inside your car. but a hot car that just won’t seem to cool down might be a bigger of a problem than you think. your car relies on being at the right temperature.

explanation:

be subject to a force andchange its motion

conduction, convection, radiation