if you want to build a smart-glove that responds based on the direction and speed a user moves their hand, what sensor should you use

Best laptops for college [$100-$500 range]?

The camera still is bad even with the new iphone xr and especially in low light it is even worst because you can see the pixels more if its in low light. if all you apple customers want apple to fix this then lets fill there feedback with complaints about the can apple do to fix this issue?

In python a floating-point number must be written using scientific notation?