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Andrej [43]
3 years ago
10

PLS PLS PLS HELPHELP HELP

Biology
1 answer:
kobusy [5.1K]3 years ago
8 0

Answer:

it is the last one

Explanation:

Isotopes are atoms that have the same number of protons but different numbers of neutrons. So B would not be correct...

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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:

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\brainly.com/question/12201392

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Ostrovityanka [42]

Answer:

The miRNA pathway of RNA interference is a result of double standed DNA entering a eukaryotic cell

Explanation:

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