If somebody swim to the right for 30 meters then swims to left for 15 meters and then swims back to the right for 50 meters whats is the person displacement

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Observations show that interstellar clouds can have almost any shape and

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius