Science

4. an electrical device consisting of a length of wire arranged in a coil for converting the level of a voltage, producing a magnetic field, or adding inductance to a circuit
6. the pole of a magnet that points toward the north
8. Magnetic resonance imaging
11. or leading stone
13. is a method of reasoning in which you use individual ideas
15. with a positive electric charge equal in magnitude to that of an electron
19. each of the points near the extremities of the axis of rotation of the earth
20. is the quantitative property that must be transferred to an object

1. is a vector field that describes the magnetic influence of electric charges
2. is a push or pull upon an object
3. an electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication
5. Those materials which are not attracted by a magnet
7. is either of two points on the surface of a rotating planet
9. is a tiny particle that comprises waves of electromagnetic radiation
10. a short-lived subatomic particle that is an excited state of a more stable particle
12. an instrument containing a magnetized pointer
14. the basic unit of a chemical element
16. a piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism
17. the same mass as a proton but without an electric charge
18. electrocardiogram