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3 years ago

If an atom has seven electrons how many are in the second shell?

Physics

2 answers:

Ostrovityanka [42]3 years ago

6 0

5 electrons because first shell can only have two electrons and second can hold up until 8

jeyben [28]3 years ago

4 0

If it had seven electrons then we know that the first energy lever has to have two and no more and so it would be 5 as you will only have 5 left. if you had more then 8 then there would be three but these not so your fine!! 5 electrons on other shell

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Power of an electric motor is 1 h.p. what does it mean ?

const2013 [10]

Answer: HP = Horse Power.

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3 years ago

what is the distance moved by a particle moving along x axis if it starts from x=-7m goes upto x= -12m turns and stops at x=+34m

Marizza181 [45]

Answer: Trajectory=51m

Displacement=41m

Explanation:

Let's begin by stating clear that movement is the change of position of a body at a certain time. So, during this movement, the body will have a trajectory and a displacement, being both different:

The trajectory is the path followed by the body (is a scalar magnitude).

The displacement is the distance in a straight line between the initial and final position (is a vector magnitude).

According to this, in the description of the object placed at x= -7m on a number line and moving some 12m to the left and then to the right, stopping at x=34m; we are talking about the path followed by the object, hence its trajectory. So, 51 m is its trajectory.

But, if we talk about displacement, we have to draw a straight line between the initial position of the object (x=-7m) to its final position (x=+34m).

Now, being this an unidimensional problem, the displacement vector for this object is 41m.

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3 years ago

Using the words mass and distance explain why astronauts experience less gravitational pull than on Earth?

Aloiza [94]

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3 years ago

A 6.25 L tank holds helium gas at a pressure of 1759 psi. A second 6.25 L tank holds oxygen at a pressure of 467.7 psi. The two

rodikova [14]

Answer:

P=1113.35 psi

Explanation:

For tank 1

V₁= 6.25 L

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For tank 2

V₂=6.25 L

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Lets take final pressure is P

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Now by putting the values

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P=1113.35 psi

So the final volume of the system will be 1113.35 psi.

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3 years ago

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4 years ago