Physics

# If $\xrightarrow { A } =3\hat { i } -\quad 4\hat { j }$ and $\overrightarrow { B } =-\hat { i } -\quad 4\hat { j }$, calculate the direction of $\overrightarrow { A } -\overrightarrow { B }$

##### ANSWER

along positive x- axis

You're just one step away

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

Single Correct Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 218

#### Realted Questions

Q1 Single Correct Hard
The sides of a rectangle are $7.01\ m$ and $12\ m$. Taking the significant figures into account, the area of the rectangle is
• A. $84.1\ m^{2}$
• B. $84.00\ m^{2}$
• C. $84.12\ m^{2}$
• D. $84\ m^{2}$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Single Correct Medium
A uniform wire of length $l=5\pm0.05 cm$ and radius $r=0.5\pm0.005 cm$ has mass $m=0.4+0.004g$. The maximum percentage error in its density is
• A. 1
• B. 2
• C. 4
• D. 5.8

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
The value of $x$ in the formula $Y=\dfrac { 2{ mgl }^{ x } }{ { 5bt }^{ 3 }e }$ is (Where $m$ is the mass, $g$ is acceleration due to gravity, $l$ is the length, $b$ is the breadth, $t$ is the thickness, $e$ is the extension and $Y$ is Young's Modulus.)
• A. 3
• B. 2
• C. 1
• D. 4

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The best method to reduce random error is
• A. To change the instrument used for the measurement
• B. To take help of experienced observer
• C. To repeat the experiment many times and to take the average results
• D. None of the above

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Matrix Medium
Column-I $\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;$ Column-II
(Note: Here it is given that you have to match one to one only)
 Base unit N Derived unit hp Improper unit kgwt Practical unit rad Supplementary unit kg

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020