The time it takes for the Moon to rotate once around its axis is equal to the time it takes for the Moon to orbit once around Earth
Answer:
x = 0.9 m
Explanation:
For this exercise we must use the rotational equilibrium relation, we will assume that the counterclockwise rotations are positive
∑ τ = 0
60 1.5 - 78 1.5 + 30 x = 0
where x is measured from the left side of the fulcrum
90 - 117 + 30 x = 0
x = 27/30
x = 0.9 m
In summary the center of mass is on the side of the lightest weight x = 0.9 m
Answer:
The speed is the same as long as the reflection is regular.
Explanation:
This is because in regular reflection, the angle of incidence is equal to the angle of reflection in accordance with the second law of reflection.
Since speed of light depends on the angle of the light ray it makes with the reflecting surface, the speed is the same
Answer:
Check Explanation
Explanation:
Ampere's Law gives the expression for the magnetic field produced by current in a current carrying material.
Mathematically, it is explained that the product of permeability and current is equal to the sum of the dot product of the magnetic field in the direction of the length elements and the length elements.
μ₀I = ∫ B.dl (note that this integral is around the entire loop of current carrying material)
This law is valid for infinite current carrying wires because the magnetic field around such infinite current carrying wire is symmetrical.
The magnetic field around a finite length of wire is non-symmetrical and the current isn't continuous.
For Ampere's Law to work, the magnetic field around the wire must be symmetric, for straightforward computation and the current in the wire needs to be continuous, not cut short at the edges which makes the field around the wire non-symmetrical.
So, this condition is interlinked.
Hence, it is evident that only option A is absolutely correct.
Options C and D on their own aren't totally correct, but in conjunction with option E, they are correct.
Hope this Helps!!!
The formula 
is used when the statement of second law of motion is applied to the problem. If the statement is applied to the problem, The fomula will be used. If not, use the formula 
