The molecules in the air must encounter electrons to create a spark. This will sometimes happen with no warning, such as when you receive a shock from touching a doorknob.
Two molecules must collide with each other.
The temperature must be hot to do so.
The spark timing must conform to the increase in rpm's of the engine. If the timing does not advance as the speed increases, the spark will not happen at the correct time during the exhaust stroke.
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sound is simply the vibration of air molecules. so, sound occurs whenever air molecules are vibrated. but in order for us as humans to hear that sound, the air molecules have to vibrate within a certain frequency range
two molecules must collied before diffusion happens.
Many water molecules condense on a tiny particle.
mating must happen randomly
They must be injected to get in the you bllod and if they do it will kill you
For a new moon to occur the moon must be between earth and the sun
the glucose molecules must break down into two smaller molecules
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A population must be isolated in some way
mating must happen randomly
mating must happen randomly
they must be broken down and it should absorb into the blood
Two molecules must collide with each other.