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weqwewe [10]
3 years ago
9

Where did most of the chemical elements that make up our bodies come from?

Biology
1 answer:
krek1111 [17]3 years ago
5 0
The atomic components enter from our bodies mostly from what we eat, with the main exception being oxygen which comes from the air.
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b

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Which biome or ecosystem has the most precipitation ?
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Which of these is an indicator of the age of a woody plant? The number of growth rings The thickness of the growth rings The dis
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3 years ago
A 6,000 kg train car is moving to the right at 10 m/s and connects to a 4,000-kg train car that wasn't moving. What is the veloc
SIZIF [17.4K]

6 m/s

This type of collision is a <u>Inelastic collision </u>

Explanation:

We begin by finding the momentum of the initial train car;

Remember that momentum is given by the formulae mass (kg) * velocity (m/s)

Therefore;

Momentum = 6000 * 10

= 60,000 kg⋅m/s

The other car has zero momentum because;

4000 * 0

= 0

When the two train cars collide, the total momentum will be;

60,000 + 0 = 60,000

Therefore to find the velocity, well use the same formulae;

p = mv  whereby;

p – momentum

m – mass

v – velocity

60,000 = (6000 + 4000) * v

v = 60,000 / 10,000

v = 6

= 6 m/s

This is an elastic collision because we are assuming that no energy is lost in the collision. Most collisions, however, are not elastic but rather inelastic. In inelastic collision some of the kinetic energy is lost to the environment in some other form of energy such as heat energy.

Learn More:

For more on elastic collisions check out;

brainly.com/question/10864123

\brainly.com/question/12201392

#LearnWithBrainly

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3 years ago
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