Answer:
intensity because square of the amplitude is proportional to the intensity of the wave
Explanation:
Run electrity through or is postive to the circuit
A. nucleus
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The direction of electric field by the charge in and on the metal block will be along the direction line 5 as given in question.
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How to determine electric field direction in a metal block?</h3>
The charge always remain on outer surface of metal and inside the metal block, the net electric field is zero. But due to dipole there is an electric field at the center of metal block i.e. at point R along direction line 1.
Now, to make make the net electric field zero at center, the electric field by the charge in and on the metal block must be equal in magnitude to that of electric field due to dipole at point R and in opposite direction to that of the net electric field at at R due to dipole.
The electric field by the charge in and on the metal block will be making 180° angle to the electric field due to dipole at point R.
Hence the direction of electric field by the charge in and on the metal block will be along the direction line 5 as given in question.
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Answer:
Time taken to accelerate to 48 m/s = 8 seconds
Explanation:
Initially the object is moving south at = 
So, initial velocity of the object =
Acceleration caused by the force = 4 
Final velocity towards south = 
Using equation of motions:
where
final velocity
initial velocity
acceleration
time
Plugging in values.
Subtracting both sides by 16
Dividing both side by 4.
∴ 
Time taken to accelerate to 48 m/s = 8 seconds
