Physics

# Differentiate between the scalar and vector quantities, giving  two examples of each.

##### SOLUTION
Scalars are quantities which have magnitude only. For example temperature (room temperature is $20^0 C$, there is no point of direction) and mass (2kg mass of an object).
While vector quantities have both magnitude and direction. For example force (2N force is applied in forward direction) and velocity (object is moving with $3ms^{-1}$ in north-east direction).

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!

Subjective Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 202

#### Realted Questions

Q1 Single Correct Medium
The Van der Waal's equation of state for some gases can be expressed as:
$(P + \dfrac{a}{V^2})(V - b) = RT$
where P is the pressure, V is the molar volume, and T is the absolute temperature of the given sample of gas and a,b and R are constants.
Which of the following does not have the same dimensional formula as that for RT?
• A. PV
• B. Pb
• C. $\dfrac{a}{V^2}$
• D. $\dfrac{ab}{V^2}$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Single Correct Medium
The period of oscillation of a simple pendulum is expected to depend upon the length of the pendulum $(l)$, and acceleration due to gravity $(g)$. The constant of proportionality is $2\pi$. Then $T$ $=$
• A. $\dfrac { 2\pi l }{ g }$
• B. $2\pi \sqrt { \dfrac { g }{ l } }$
• C. $2\pi \sqrt { \dfrac { l }{ g } }$
• D. $\dfrac { 2\pi g }{ l }$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
If $x=at+b{ t }^{ 2 }$ where $x$ is measured in $m$ and $t$ in $s$, then the dimension of $\left( { b }/{ a } \right)$ is:
• A. $[L{ T }^{ -2 }]$
• B. $[L{ T }^{ -1 }]$
• C. $[T]$
• D. $[{ T }^{ -1 }]$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
If the velocity $(V)$, Acceleration $(A)$ and force $(F)$ are taken as fundamental quantities instead of mass $(M)$, length $(L)$ and Time $(T)$. The dimensions of young's modulus $(Y)$ would be :
• A. $F{A^2}{V^{ - 4}}$
• B. $F{A^2}{V^{ - 5}}$
• C. $F{A^2}{V^{ - 3}}$
• D. $F{A^2}{V^{ - 2}}$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Subjective Medium
You have a bag of cotton and an iron bar, each indicating a mass of $100kg$ when measured on a weighing machine. In reality, one is heavier than the other. Can you say which one is heavier and why?

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020