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2 years ago

Question: True or False

Physics

1 answer:

lakkis [162]2 years ago

8 0

1 True

2 True

3 True

4 False

5 False

<h3>HOPE IT HELPS.</h3>

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Which model could represent a neutral atom of boron?

UNO [17]

Answer:

model 3

Explanation:

Boron with atomic number 5 will have 3 valence electrons

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3 years ago

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Gravity causes all falling objects to accelerate at a rate of 98 m/s2. O True O False

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It’s true the acceleration of falling objects on earth due to gravity is 98ms2

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3 years ago

Which is an example of a scientist using a conceptual model to describe a volcano?

Yuri [45]

I would say D would be the answer. but is this even a real like homework question

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3 years ago

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A space vehicle approaches a space station in orbit. The intent of the engineers is to have the vehicle slowly approach, reducin

N76 [4]

Answer: The total momentum before the docking maneuver is $mV_{1}+MV_{2}$ and after the docking maneuver is $(m+M) U$

Explanation:

Linear momentum $p$ (generally just called momentum) is defined as mass in motion and is given by the following equation:

$p=m.v$

Where $m$ is the mass of the object and $v$ its velocity.

According to the conservation of momentum law:

"If two objects or bodies are in a closed system and both collide, the total momentum of these two objects before the collision $p_{i}$ will be the same as the total momentum of these same two objects after the collision $p_{f}$ ".

$p_{i}=p_{f}$

This means, that although the momentum of each object may change after the collision, the total momentum of the system does not change.

Now, the docking of a space vehicle with the space station is an inelastic collision, which means both objects remain together after the collision.

Hence, the initial momentum is:

$p_{i}=mV_{1}+MV_{2}$

Where:

$m$ is the mass of the vehicle

$V_{1}$ is the velocity of th vehicle

$M$ is the mass of the space station

$V_{2}$ is the velocity of the space station

And the final momentum is:

$p_{f}=(m+M)U$

Where:

$U$ is the velocity of the vehicle and space station docked

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3 years ago

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Question 1 2 pts Explain what causes a solution to be a strong acid.

lubasha [3.4K]

Answer:

Cuanto más fuerte es el ácido, más rápido se disocia para generar H +start superscript, plus, end superscript. Por ejemplo, el ácido clorhídrico (HCl) se disocia completamente en iones hidrógeno y cloruro cuando se mezcla con agua, por lo que se considera un ácido fuerte.

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3 years ago