When analyzing the results of a scientific experiment, Kevin should base his conclusion on
2 answers:
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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 direction of propagation is west.
Explanation:
We know that electromagnetic waves (EM-waves) are transverse in nature. EM-waves containing electric field and magnetic field both are perpendicular to the each other ( E ⊥ B ).
Transverse waves : the direction of propagation is perpendicular to the direction of amplitude which we call transverse waves. eg : light waves, water waves, gravitational waves etc.
Here, in our case the direction of electric field is pointing upward to the plan of the screen and the direction of magnetic field is pointing north
∴ ×
Where direction of electric field,
direction of magnetic field,
direction of propagation at particular instant.
Above equation follows right hand rule. put your finger toward you (out of the screen) then curl to the north side then the thumb will give you the direction of the wave propagation ( west side )
In our case west direction is the direction of wave propagation.