Kilogram is mass and a pound is mass influenced by gravity aka the weight relative to it's form on earth's effects on it.
so kilogram, mass.
weight, pound
The truck would of went 150 miles
That kind of depends on the motion of the object. The graph is drawn in order
to illustrate the nature of the object's motion, and they're all different. If they
were all the same, then graphs would be boring, and nobody would draw them
anymore.
A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs.
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