Question | Answer |
what are the renewable resources? | solar enjegy, wind, thermal enegy, hydropower, geothermal |
what are the non-renewable resources? | oil, gas, coal, patrolium, natural gas |
what are fossil fuels? | a nonrenewable resource formed from the remains of organisms that lived long ago |
what are the energy forms? | thermal, sound, nuclear, mechanical, chemical, electrical, light |
what are the energy states? | potential, kinetic |
what is friction? | the property that causes objects to resist being moved across each other |
what are four factors of friction? | soft materials, larger surfaces, rough surfaces, high pressure |
what is the work calculation? | force x distance= work |
what is a closed system ? | a group of objects that transfer enegy only to each other |
what is the law of concervation of energy? | energy cannot be created nor destroyed |
what is a wave? | a disturbance that transfers energy from place to place |
what is a mechanical wave? | a wave that requires a medium through which to travel |
what are transverse waves? | waves that move the medium at right angles to the direction in which the waves are traveling |
what is a crest? | the highest part of a transverse wave |
what is a trough ? | the lowest part of a transverse wave |
what is a longitudinal wvae? | a wave that moves the particles of a medium parallel to the direction in which waves are traveling |
what is a medium? | the material through which a wave travels |
what is amplitude? | the maximum distance the particles of the medium carrying a wave move away from their rest position |
what is wave length ? | the distance between tw correspodning parts of a wave |
what is frequency? | the numbers of complete waves that pass a given point in a certain amount of time |
what is electromagnetic waves? | a form of radient energy |
what is the calculation for speed? | distance divided by time=speed |
what is pitch? | the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone |
what is vibration? | an instance of vibrating. |
what is vacuum? | a space entirely devoid of matter. |
what is an open system? | a material system in which mass or energy can be lost to or gained from the environment. |
what is a newton? | .
the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one meter per second per second, and is equivalent to 100,000 dynes. |
what is force? | strength or energy as an attribute of physical action or movement |