Please who can solution this electric question.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

How does an observation about an object differ from an inference about that object

To a of 4 x hz is 1. 0. mm nm nm