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2 years ago

Which of these is not one of the groups on the periodic table?

Physics

2 answers:

bixtya [17]2 years ago

4 0

Answer:

metalloids

Explanation:

because they are group for metals and non metals plus there are gasses for example oxygeon O

aleksandrvk [35]2 years ago

3 0

Answer:

non-metals is the answer

Explanation:

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All animals need oxygen. We get oxygen from the air we breathe. How do fish get theirs?

Finger [1]

Um, I not positive, but I think fish don't need oxygen.

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2 years ago

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If there is an unbalanced force acting on an object, the object will?

Nonamiya [84]

Answer:

Explanation:

because newton's second law states that if a resultant force acts on an object then, it will accelerate in the direction of the resultant force

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2 years ago

Rocks A and B are located at the same height on top of a hill. The mass of rock A is twice the mass of rock B. How does the pote

Ronch [10]

Potential energy is defined by formula

$U = mgh$

here

m = mass

g = acceleration due to gravity

h = height

Now here two different stones are located at same height

while mass of stone A is twice that of stone B

so here we can say potential energy of A is

$U_a = (2m)gh$

Similarly potential energy of B is

$U_b = mgh$

now if we take the ratio of two energy

$\frac{U_a}{U_b} = 2$

so we can say potential energy of stone A is two times the potential energy of B

7 0

2 years ago

What was the average velocity for the entire trip?

just olya [345]

Answer:

3.721 m/s

This is the explanation of the ans

6 0

1 year ago

An open train car moves with speed 18.5 m/s on a flat frictionless railroad track, with no engine pulling the car. It begins to

olga2289 [7]

Answer:

The speed decreases.

Explanation:

This can be explained using the conservation of linear momentum.

Since there is no friction, the initial moment of the train must be equal to its linear moment after it is filled with water.

the initial linear momentum is

$m_{1}v_{1}$

where $m_{1}$ is the initial mass of the train, and $v_{1}$ the initial speed of the train.

And linear momentum after the water filled the train car is

$m_{2}v_{2}$

where $m_{2}$ is mass of the train after the rain, and $v_{2}$ the speed of the train after the rain

the equality must be fulfilled:

$m_{1}v_{1}=m_{2}v_{2}$

We know that if water is added to the train, $m_{2}$ that is the mass after the water is added, is greater than $m_{1}$ which is the mass of the train without the water.

Therefore, in order for the conservation of the linear momentum to be fulfilled: $m_{1}v_{1}=m_{2}v_{2}$

the speed after the water is added ( $v_{2}$ ) must be smaller than the initial train speed ( $v_{1}$ ) . So the speed of the car decreases.

3 0

2 years ago