what is the magnitude of component of a vector in
right angle to itself, ?

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.

What equation is used to calculate the weight of an object on a plant ?

An atom that has gained or lost electrons is called an _