Consider a system to be two train cars traveling toward each other. What is the total momentum of the system before the train cars collide?

kg • m/s

What must the total momentum of the system be after the train cars collide?

kg • m/s

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.