Amaterial that is not easily scratched is

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

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.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?