Answer:
False
Explanation:
Vector has a magnitude and direction.
A scalar is just a magnitude or size.
Answer:
The polarity of the magnetic field changes
Explanation:
This because The magnetic field generated is always perpendicular to the direction of the current and parallel to the solonoid. Hence if we reverse the current the direction of magnetism also reverses. In other words the magnetic poles gets reversed (North pole becomes south pole and the south pole becomes the north pole)
To solve this problem, the concepts related to the balance of forces must be applied. In this case the two forces that must be in balance are the Weight and the centripetal force. Both forces are derived from Newton's second law, one of the linear movement and the other of the angular movement. The centripetal force is given by the function

Here,
m = mass
v =Velocity
R = Radius
And the force product of the weight is given under the function

Here,
m = Mass
g = Gravity
As both forces are in balance we will have





Speed would be


Replacing


The radius must be 12.6m
Answer:
Earthquakes and volcanoes generate the great majority of tsunamis, and the theory of plate tectonics explains the cause of earthquakes and volcanoes. ... The San Andreas fault in California occurs at this type of plate boundary. At divergent boundaries, plates move away from each other.
Explanation:
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