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Kapil B.
Tutor from past 6 years
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Physics (Newtonian Mechanics)
TutorMe
Question:

When is the linear momentum of a body or system of bodies conserved?

Kapil B.
Answer:

Linear momentum is conserved when net force is zero,

Physics (Electricity and Magnetism)
TutorMe
Question:

Is electric current a scalar or a vector?

Kapil B.
Answer:

Electric current is a scalar quantity. It has both magnitude and direction but it does not obey the law of addition of vectors. It is simply added as a scalar quantity.

Physics
TutorMe
Question:

Is pressure a scalar or a vector quantity?

Kapil B.
Answer:

Pressure is a scalar quantity. Even though it contains force, which is a vector. But actually in the pressure definition, we take only the normal (or perpendicular) component of the force, that is only one component of force. So, it is a scalar quantity.

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