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谁告诉这些题怎么写那--(英文好的科学高手进)1)whydoesanexperimentonlyeverhaveONEindependentvarible?2)whatistherelationshipbetweenmassandinertiaofanobject?3)whyfactorsdeterminetheamountofgravitationalforc
更新时间:2024-04-19 10:03:01
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问题描述:

谁告诉这些题怎么写那--(英文好的科学高手进)

1)whydoesanexperimentonlyeverhaveONEindependentvarible?

2)whatistherelationshipbetweenmassandinertiaofanobject?

3)whyfactorsdeterminetheamountofgravitationalforce?

4)frictiondependsonwhat2factors?

energy、joules、mechanicalenergy、potentialenergy、kineticenergy、lawofconservationofenergy、elasticpotentialenergy、gravitationalpotentialenergy、chemicalpotentialenergy、thermalenerty、nuclearenergy、electromagneticenergy、

energytransformation

选项..

1a)aballheldintheairhas_____becauseitisabovethefloorand____ispullingtheballdown.

1b)beforethegroundmovesduringanearthquake,thegeologicplatesthatmakeupthecrustaremovingunderthesurface.theybuilduptremendousstrain(_____)beforethatsuddenlybreaklooseandcausean____.

1c)batteriesareasourceofpotentialenergy.theyhave___.sodoesfood.

2a)the___oftheballisconvertedto___whentheballisdropped.

2b)the___ofthegeologioplatesisconvertedto___whentheplatesmoveandcausetheearthquake.

2c)the___inanbatteryisconvertedtolightenergywhenyouturnonaflashlight.

2d)whattypeofenergyisrequiredforplantstoperformpfotosynthesis?

2e)ifyouincreasethemassofamovingobject,whathappenstoitskineticenergy?

纪文成回答:
  1.控制变量法.2.inertiaisproportionaltomass3.massofearth;distancebetweenthecenterofearthandtheobject4.normalforce;frictioncoefficient选择题1.gravitationalpotentialenergy;gravity2...
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