1. 2. The periodic variation in the surface level of the oceans and of bays, gulfs, inlets, and estuaries, caused by gravitational attraction of the moon and sun.
  2. 4. A magnet consisting essentially of a coil of insulated wire wrapped around a steel or iron core that is magnetized only when current flows through the wire.
  3. 6. the field produced by the gravitational force of mass
  4. 8. a device that creates motion.
  5. 12. a substance that resists electric current
  6. 13. power that an object gets from its position and motion.
  7. 19. a very long-range, but relatively weak fundamental force of attraction that acts between all particles that have mass; believed to be mediated by gravitons
  8. 21. the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time
  9. 22. property of a conductor due to which it opposes the flow of current through it.
  10. 25. another name for charge
  1. 1. how heavy something is or how much mass it has.
  2. 3. the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic field.
  3. 5. the region of space surrounding a body, such as a charged particle or a magnet, within which it can exert a force on another similar body not in contact with it
  4. 7. amount of matter
  5. 9. The capacity of a physical system to do work.
  6. 10. electromotive force or potential difference expressed in volts.
  7. 11. a change in velocity.
  8. 14. the force, acting upon a body moving along a curved path, that is directed toward the center of curvature of the path and constrains the body to the path.
  9. 15. the energy of a body or a system with respect to the position of the body or the arrangement of the particles of the system.
  10. 16. an object allowing the flow of electric charge
  11. 17. The force exerted between magnets.
  12. 18. the energy of a body or system with respect to the motion of the body or particles in the system
  13. 20. One that generates, especially a machine that converts mechanical energy into electrical energy.
  14. 23. all competing influences are balanced
  15. 24. The rate or a measure of the rate of motion