Which statement correctly compares sound and light waves
1 answer:
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To solve this problem it is necessary to apply the concepts related to the conservation of momentum and conservation of kinetic energy.
By definition kinetic energy is defined as
Where,
m = Mass
v = Velocity
On the other hand we have the conservation of the moment, which for this case would be defined as
Here,
m = Total mass (8Kg at this case)
Mass each part
Initial velocity
Final velocity particle 2
Final velocity particle 1
The initial kinetic energy would be given by,
In the end the energy increased 100J, that is,
By conservation of the moment then,
Replacing we have,
(1)
In the final point the cinematic energy of EACH particle would be given by
(2)
So we have a system of 2x2 equations
Replacing (1) in (2) and solving we have to,
200J=\frac{1}{2}4*(V_1^2+(10-V_1)^2)
PART A:
Then replacing in (1) we have that
PART B:
Answer:
The second option.
When the current flows up the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
Explanation:
The first figure that I copy here with is the figure corresponding to this question.
The thumb is pointing upward.
The rule is that the thumb aims to the direction of the flow of current and the other fingers give the field lines.
The second figure that I attach is a free image from internet and it shows the direction of both the current and the fiedl lines.
So, the conclusion is that the current goes upward the wire and the field lines go out of the paper (screen) for the points to the left of the wire and in on the right side of the wire.
The second option.
When the current flows up the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
Explanation:
The first figure that I copy here with is the figure corresponding to this question.
The thumb is pointing upward.
The rule is that the thumb aims to the direction of the flow of current and the other fingers give the field lines.
The second figure that I attach is a free image from internet and it shows the direction of both the current and the fiedl lines.
So, the conclusion is that the current goes upward the wire and the field lines go out of the paper (screen) for the points to the left of the wire and in on the right side of the wire.