Answer:
the question has some missing details i.e E = E0sin(kx -wt)y and B = B0sin(kx -wt)z
The variables E0 and B0 are the amplitudes.
option C is correct.
Explanation:
Compare the equation given with the general wave equation ; Y = Asin(kx - wt)
Where A is the amplitude
<span>Advantages:
- Easy to repair
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- Function after minor damage
- Don't disturb the shoreline
Disadvantages:
- Expensive
- Ugly
- Ruin the surfing tourism industry
- Can be displaced easily by waves
- Don't absorb all energy due to gaps between the breakwater</span><span>
</span>
Answer:
The distance of the image produced by the concave mirror is 11.27 cm.
Explanation:
Given that,
Focal length = 8.40 cm
Distance between object and plane mirror = 11.0 cm
Distance between plane mirror and concave mirror = 22.0 cm
We need to calculate the object distance
We need to calculate the distance of the image
Using formula of distance of the image
Where, u = Object distance
f = focal length
Put the value into the formula
Hence, The distance of the image produced by the concave mirror is 11.27 cm.
Answer:
Towards the west
Explanation:
Magnetic force is the interaction between a moving charged particle and a magnetic field.
Magnetic force is given as
F = q (V × B)
Where F is the magnetic force
q is the charge
V is the velocity
B is the magnetic field
V×B means the cross product of the velocity and the magnetic field
NOTE:
i×i=j×j×k×k=0
i×j=k. j×i=-k
j×k=i. k×j=-i
k×i=j. i×k=-j
So, if the electron is moving southward, then, it implies that the velocity of it motion is southward, so the electron is in the positive z-direction
Also, the electron is curved upward due to the magnetic field, this implies that the force field is directed up in the positive y direction.
Then,
V = V•k
F = F•j
Then, apply the theorem
F •j = q ( V•k × B•x)
Let x be the unknown
From vector k×i =j.
This shows that x = i
Then, the magnetic field point in the direction of positive x axis, which is towards the west
You can as well use the Fleming right hand rule
The thumb represent force
The index finger represent velocity
The middle finger represent field
Just watch stranger things season 3