Across
- 3. point A place used for comparison to determine if something is in motion
- 4. an object in motion stays in motion
- 7. the distance an object travels per unit of time
- 8. the state in which one objects distance from another is changing
- 9. a measure of the compactness of a substance, expressed as its mass per unit volume
- 12. second law the acceleration of an object depends on the mass of the object and the amount of force applied
- 14. a speed in any direction
- 16. a flow of electric charge through a conductor
- 17. velocity the maximum speed possible while free falling
- 18. force forces that produce a nonzero net force
- 20. produced by reactions involving atomic or molecular changes
- 22. the entity as a source of nuclear energy
- 24. the amount of energy transferred or converted
- 26. fall when the only force acted on an object is gravity
- 27. the capacity of a physical system to do work
- 28. friction friction which keeps things still
- 30. mechanical vibrations transmitted by an elastic medium
- 32. energy the mechanical energy that a body has by virtue of its motion
- 34. the rate in which the velocity changes
- 35. energy the mechanical energy that a body has by virtue its position
- 38. a deviation in the direction of a wave at the edge of an obstacle in its path
- 39. constituting the core or central part
Down
- 1. the force that pulls objects towards each other
- 2. any device for converting mechanical energy into electrical energy by electromagnetic induction
- 5. force equal force acting on an object in different directions
- 6. the number of times that a periodic function or vibration repeats itself in a specified time. Usually measured in hertz
- 10. a linear interval of space
- 11. push or pull on an object
- 13. force the overall force on an object
- 15. a stable elementary particle present in all atoms, orbiting the nucleus in numbers equal to the atomic number of the element in a neutral atom
- 16. a substance, body, or system that conducts electricity, heat, etc.
- 19. quantity of matter
- 21. of conservation of energy the law that states that energy cannot be created nor destroyed but can be changed from one form to another
- 23. the process by which masses of relatively warm air are raised into the atmosphere, often cooling and forming clouds, which compensatory downward movements of cooler air
- 25. third law for every action there is an equal opposite reaction
- 26. the force between two rubbing surfaces
- 29. the frequency of a periodic phenomenon that has a periodic time of 1 second
- 31. plains a flat surface which has a slope
- 33. the product of a body's mass and velocity
- 36. the part of the electromagnetic spectrum with a longer wavelength than light but a shorter wavelength than radio waves
- 37. the random thermal motion of atoms, molecules, clusters of atoms, et, in gases, liquids, and some solids