Yes, a physical quantity can have magnitude and direction but still be a scalar if it doesn't obey the vector addition. An example is Electric Current which has magnitude and a fixed direction, but it does not follow vector laws of addition.

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Diwas Pandit asked a question

No, if three vectors do not lie in a plane, they cannot give zero resultant.

Explanation:

Let A, B and C be three vectors. If they give zero resultant, then

A+B+C=0

or, A= -(B+C)

Hence, they will produce zero resultant, if A is equal to negative of vector (B+C). The vector (B+C) lies in the plane of B and C. Hence, A will be equal to negative of (B+C) if AB and C all lie in a plane.

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Nikas Ghimire about 2 years ago
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gaurab giri

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Puspak Sah asked a question

The difference between Gram atomic  mass and Gram atomic molecular are given below:

 Gram atomic mass Gram molecular mass 1.The mass of 6.023 x 1023 atoms of one mole atom of any element when expressed in terms of grams is called gram atomic mass. 1.The mass of 6.023 x 1023 molecules or 1 mole molecule of any substance expressed in grams is called gram molecular mass. 2.It is used to calculate the mass of an atom. 2. It is used to calculate the mass of a molecule/molecular compound. 3. It is...
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