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Class 10 Class 12
Why the electrons in beam from an electron gun do not fall as much as a water molecule in stream from a hose due to gravity?

Vertical distance by which projectile falls while travelling a given distance in horizontal direction is,

From the above relation,

Velocity of electron from electron gun is greater than the water molecule from hose. Therefore, for a given horizontal displacement x, the vertical distance by which the electron beam falls is less than that for water molecule.
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What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
1212 Views

What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors.

814 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
835 Views

Give three examples of vector quantities.

Force, impulse and momentum.
865 Views