Across
- 4. : The speed of an object in a particular direction
- 6. Engine :A machine that transform heat into mechanical energy or work.
- 7. Motion :the curved path that an object follows when thrown, launched, or otherwise projected near the surface of he earth; the motion of objects that are moving in two dimensions under the influence of gravity
- 13. :A quantity, usually expressed as a percentage that measures the ratio of useful work output to work input
- 17. :A quantity that measures the rate at which work is done or energy is transformed
- 18. Fall :the motion of a body when only the force of gravity is acting on the body.
- 19. : is a measure of how hot (or cold) something is; specifically; a measure of average kinetic energy of the particles in an object
- 20. : an action exerted on a body in order to change the body’s state of rest or motion; force has magnitude and direction
- 21. :The energy that is transferred as electromagnetic waves, such as visible light and infrared waves
- 22. : The rate at which velocity changes over time; an objects accelerates if its speed, direction or both change
- 23. Velocity :The constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity
- 24. :A quantity defined as the product of the mass and the velocity of an object
- 27. : objects change in position relative to a reference point
- 29. Machine :One of six basic machine types of machines which are the basis for all other forms of machines
Down
- 1. :The tendency of an object to resist being moved or, if the object is moving, to resist a change in speed or direction until and outside force acts on the object.
- 2. Heat :The quantity of heat required to raise a unit of mass of homogeneous material 1oK or 1oC in a specific way given constant pressure and volume
- 3. Energy :The amount of work an object can do because of the object’s kinetic and potential energy
- 5. :The transfer of energy to a body by the application of a force that causes the body to move in the direction of the force
- 8. :The movement of matter due to differences in density that are caused by temperature variations
- 9. :A material used to cool an area or object to a temperature that is lower than the temperature of the environment
- 10. :The change in position of an object
- 11. Friction : The force that opposes the movement of two surfaces that are in contact with each other and are sliding over each other
- 12. Zero :The temperature at which molecular energy is a minimum 0oK on the Kelvin scale or -273.16oC on the Celsius scale
- 14. Machines :A machine made of more that one simple machine
- 15. Energy :The energy an object has because of position, shape or condition of the object
- 16. : an Instrument that measures and indicates temperature
- 25. Conduction :The transfer of energy as heat through a material
- 26. Friction: The force that resists the initiation between two surfaces that are in contact and at rest
- 28. : the distance traveled by the time interval during which the motion occurred