Question

a________and a_____are used to express the magnitude of a physical quantity.​

Answer 1

Answer:

Magnitude is the amount or number which is written before a unit and is used to express physical quantity. Here, magnitude is 20 and unit is m/s. Here, magnitude is 10 and unit is N(Newton). Here, magnitude is 15 and unit is P(Pascal).

Answer 2

Answer:

Magnitude is a amount of number which is written before a unit and is used to express physical quantity.

For examples :

20 m/s (used to express speed)

Here, magnitude is 20 and unit is m/s.

Another example..

10N(used to express force)

Here, magnitude is 10 and unit is N(Newton)

Another example...

15P(used to express pressure)

Here, magnitude is 15 and unit is P(pascal)

Here is your answer.

Hope it's help u