four equal point charges of +3.0uC are placed at the four corners of a square that is 40cm on a side. Find the force on any one of the charges​

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

What does si stand for,when referring to a system of measurement

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false