As we know acceleration is frame dependent and force is frame independent How can we write ? F = ma Frame independent = frame dependent?

I was reading a Sci-Fi book recently and had a weird thought: I know that objects closer to a gravitational well need to move faster to stay in orbit and objects further away move slower. But if you want to increase your orbit/escape the gravitational well you have to speed up while if you want t...

I am in high school and I am trying to solve this problem but I have not encountered problems like these before. How would you got about total capacitance questions for more complicated circuits?

Glass does not allow the flow of electrons through it and is transparent and has higher skin depth. Similarly, wood has no free electrons and higher skin depth but still it is opaque?