Advertisements
Advertisements
प्रश्न
Read the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that must be dimensionless.
विकल्प
True
False
उत्तर
This statement is False.
Explanation:
There are numerous scalar quantities that are not dimensionless. For example, scalar quantities like mass, density, and charge all have dimensions.
APPEARS IN
संबंधित प्रश्न
State, for each of the following physical quantities, if it is a scalar or a vector: volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity.
Pick out the only vector quantity in the following list:
Read the statement below carefully and state with reason, if it is true or false:
Three vectors not lying in a plane can never add up to give a null vector.
The position of a particle is given by
`r = 3.0t hati − 2.0t 2 hatj + 4.0 hatk m`
Where t is in seconds and the coefficients have the proper units for r to be in metres.
- Find the v and a of the particle?
- What is the magnitude and direction of velocity of the particle at t = 2.0 s?
Can you associate vectors with (a) the length of a wire bent into a loop, (b) a plane area, (c) a sphere? Explain.
Read the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that can never take negative values.
Read the statement below carefully and state, with reason and example, if it is true or false:
A scalar quantity is one that does not vary from one point to another in space.
Which one of the following statements is true?
The angle between A = `hati` + `hatj` and B = `hati` − `hatj` is ______.
It is found that |A + B| = |A|.This necessarily implies ______.
