67486 + Interview Questions in Secondary School in Physics

1.	What are the advantages of using battery
Answer» ong>Answer: Though the battery has many advantages over other energy sources, it also has major limitations that NEED addressing. Energy storage. Batteries store energy reasonably well and for a long time. ... Specific energy (CAPACITY) ... RESPONSIVENESS. ... Power bandwidth. ... Environment. ... Efficiency. ... Installation. ... Operating cost. Explanation: Hope it will HELP you and FOLLOW me.

1.

What are the advantages of using battery

Answer»

ong>Answer:

Though the battery has many advantages over other energy sources, it also has major limitations that NEED addressing.

Energy storage. Batteries store energy reasonably well and for a long time. ...

Specific energy (CAPACITY) ...

RESPONSIVENESS. ...

Power bandwidth. ...

Environment. ...

Efficiency. ...

Installation. ...

Operating cost.

Explanation:

Hope it will HELP you and FOLLOW me.

Discussion

2.	Joseph jogs from one end A to the other end b of a straight 300
Answer» ong>Explanation: (a) A to B Total distance (s) from A to B = 300M Time (t) = 2min 30s = (2 x 60) + 30 = 150s AVERAGE speed from A to B= s/t = 300m/150 = 2m/s Total displacement (s) from A to B = 300m Time (t) = 2min 30s = (2 x 60) + 30 = 150s Average VELOCITY From A to B = s/t = 300m/150 = 2m/s (b) A to C Total distance (s) from A to C = 300m + 100m = 400M Time (t) = 2min 30s + 1min = [(2 x 60) + 30] + [60] = 210s Average speed from A to C = s/t = 400m/210 = 1.90m/s Total displacement (s) from A to C = 200m Time (t) = 2min 30s + 1min = [(2 x 60) + 30] + [60] = 210s Average velocity from A to C = s/t = 200m/210 = 0.95m/s

2.

Joseph jogs from one end A to the other end b of a straight 300

Answer»

ong>Explanation:

(a) A to B

Total distance (s) from A to B = 300M

Time (t) = 2min 30s = (2 x 60) + 30 = 150s

AVERAGE speed from A to B= s/t = 300m/150 = 2m/s

Total displacement (s) from A to B = 300m

Time (t) = 2min 30s = (2 x 60) + 30 = 150s

Average VELOCITY From A to B = s/t = 300m/150 = 2m/s

(b) A to C

Total distance (s) from A to C = 300m + 100m = 400M

Time (t) = 2min 30s + 1min = [(2 x 60) + 30] + [60] = 210s

Average speed from A to C = s/t = 400m/210 = 1.90m/s

Total displacement (s) from A to C = 200m

Time (t) = 2min 30s + 1min = [(2 x 60) + 30] + [60] = 210s

Average velocity from A to C = s/t = 200m/210 = 0.95m/s

Discussion

3.	Jal me present hanikark jivanuvo ko nast karnevale do pdarth ke name likhe
Answer» ong>ANSWER: CHLORINE and POTASSIUM permanganate HOPE THIS WILL HELP YOU!!!

3.

Jal me present hanikark jivanuvo ko nast karnevale do pdarth ke name likhe

Answer»

ong>ANSWER:

CHLORINE and POTASSIUM permanganate

HOPE THIS WILL HELP YOU!!!

Discussion

4.	How many molecules of water are you there in 36g
Answer» ong>Answer: HOPE U like my answer Plz rate my answer and MARK it as BRAINLIEST NEED only one brainliest for ace rank.plz!!! Explanation: no.of molecules is 12.044 x 10^23 molecules

4.

How many molecules of water are you there in 36g

Answer»

ong>Answer:

HOPE U like my answer

Plz rate my answer and MARK it as BRAINLIEST NEED only one brainliest for ace rank.plz!!!

Explanation:

no.of molecules is 12.044 x 10^23 molecules

Discussion

5.	1. PVC -এর মনােমারটি হল
Answer» ENGLISH me SEND KER NA

Discussion

6.	The maximum resistance which can be made by four resistors of 2 is
Answer» ONG>ANSWER: don't KNOW .................

Discussion

7.	Is capacitance c proportional to
Answer» ONG>Explanation: Capacitance (C) is DIRECTLY PROPORTIONAL TO THE AREA OF THE TWO PLATES that directly OVERLAP, the GREATER the overlapping area, the greater the capacitance. Capacitance is INVERSELY PROPORTIONAL TO THE DISTANCE BETWEEN THE PLATES.

7.

Is capacitance c proportional to

Answer» ONG>Explanation:

Capacitance (C) is DIRECTLY PROPORTIONAL TO THE AREA OF THE TWO PLATES that directly OVERLAP, the GREATER the overlapping area, the greater the capacitance. Capacitance is INVERSELY PROPORTIONAL TO THE DISTANCE BETWEEN THE PLATES.

Discussion

8.	Difference between mass and weight
Answer» ONG>Answer: The mass of an OBJECT is a measure of the object's inertial PROPERTY,or the amount of water it contains.The weight of an object is a measure of the force exerted on the object by gravity,or the force needed to support it.

Discussion

9.	A mass m sliding horizontally is subject to a viscous drag force. For an init ial velocity v0 (at x = t = 0) and a retarding force F = - bx find t he velocity as a function of distance, v(x) , and show t hat the mass moves a finite distance before coming to rest
Answer» rong>The velocity v(x) as function of x is: $\boxed{v(x)^2=v_0^2-\frac{bx^2}{m}}$ The finite distance moved by the mass is: $\boxed{x=v_0\sqrt{\frac{m}{<klux>B</klux>}}}$ Explanation: Given RETARDING force $F=-bx$ INITIAL velocity $u=v_0$ The mass is m Acceleration due to retarding force will be $a=\frac{F}{m}$ $\implies a=\frac{-bx}{m}$ We know that $a=\frac{dv}{dt}$ or $a=\frac{dv}{dx}.\frac{dx}{dt}$ or, $a=v\frac{dv}{dx}$ Thus, $v\frac{dv}{dx}=-\frac{bx}{m}$ $\implies mvdv=-bxdx$ $\implies m\int_{v_0}^{v(x)} vdv=-b\int_0^x xdx$ $\implies m\frac{v^2}{2}\Bigr\|_{v_0}^{v(x)}=-b\frac{x^2}{2}\Bigr\|_0^x$ $\implies m(\frac{v(x)^2}{2}-\frac{v_0^2}{2}=-b\frac{x^2}{2}$ $\implies \boxed{v(x)^2=v_0^2-\frac{bx^2}{m}}$ This is the expression of velocity v(x) as a function of distance x Now if $v(x)=0$ Then $0=v_0^2-\frac{bx^2}{m}$ $\implies x^2=\frac{mv_0^2}{b}$ $\implies x=\sqrt{\frac{mv_0^2}{b}}$ $\implies \boxed{x=v_0\sqrt{\frac{m}{b}}}$ Which is the finite distance moved by mass before coming to rest. Hope this answer is helpful. Know More: Q: When a force ACT on a body of mass its position x varies with time t as x=at^4+bt+c where a,b,c are constants WORKDONE is : Click Here: brainly.in/question/16376510

9.

A mass m sliding horizontally is subject to a viscous drag force. For an init ial velocity v0 (at x = t = 0) and a retarding force F = - bx find t he velocity as a function of distance, v(x) , and show t hat the mass moves a finite distance before coming to rest

Answer»

rong>The velocity v(x) as function of x is:

$\boxed{v(x)^2=v_0^2-\frac{bx^2}{m}}$

The finite distance moved by the mass is:

$\boxed{x=v_0\sqrt{\frac{m}{<klux>B</klux>}}}$

Explanation:

Given

RETARDING force

$F=-bx$

INITIAL velocity

$u=v_0$

The mass is m

Acceleration due to retarding force will be

$a=\frac{F}{m}$

$\implies a=\frac{-bx}{m}$

We know that

$a=\frac{dv}{dt}$

or $a=\frac{dv}{dx}.\frac{dx}{dt}$

or, $a=v\frac{dv}{dx}$

Thus,

$v\frac{dv}{dx}=-\frac{bx}{m}$

$\implies mvdv=-bxdx$

$\implies m\int_{v_0}^{v(x)} vdv=-b\int_0^x xdx$

$\implies m\frac{v^2}{2}\Bigr|_{v_0}^{v(x)}=-b\frac{x^2}{2}\Bigr|_0^x$

$\implies m(\frac{v(x)^2}{2}-\frac{v_0^2}{2}=-b\frac{x^2}{2}$

$\implies \boxed{v(x)^2=v_0^2-\frac{bx^2}{m}}$

This is the expression of velocity v(x) as a function of distance x

Now if $v(x)=0$

Then

$0=v_0^2-\frac{bx^2}{m}$

$\implies x^2=\frac{mv_0^2}{b}$

$\implies x=\sqrt{\frac{mv_0^2}{b}}$

$\implies \boxed{x=v_0\sqrt{\frac{m}{b}}}$

Which is the finite distance moved by mass before coming to rest.

Hope this answer is helpful.

Know More:

Q: When a force ACT on a body of mass its position x varies with time t as x=at^4+bt+c where a,b,c are constants WORKDONE is :

Click Here: brainly.in/question/16376510

Discussion

10.	Ink fills a fountain pen because of liquid pressure true or false
Answer» ONG>ANSWER: i GUESS true Im not SURE too

10.

Ink fills a fountain pen because of liquid pressure true or false

Answer» ONG>ANSWER:

i GUESS

true

Im not SURE too

Discussion

11.	Given ā = i + 2; and b = 2i + j what are the magnitudes of the two vectors? Are these two vectors equal
Answer» $= \sqrt{ {a}^{2} + {b}^{2} + 2ab \cos( \theta) }$ $\sqrt{ {3}^{2} + {3}^{2} + 18 }$ $= \sqrt{36}$ $= 6$

11.

Given ā = i + 2; and b = 2i + j what are the magnitudes of the two vectors? Are these two vectors equal

Answer»

$= \sqrt{ {a}^{2} + {b}^{2} + 2ab \cos( \theta) }$

$\sqrt{ {3}^{2} + {3}^{2} + 18 }$

$= \sqrt{36}$

$= 6$

Discussion

12.	Calculate work done on charge 1C in an electrostatic field 2 Newton/c alongx axis when charge is moved the through adistance2.5 m along+x-axis
Answer» ave to calculate the WORK DONE on charge 1 C in an electrostatic field 2 N/C along x - axis when charge is moved through a DISTANCE 2.5 m along +x axis. solution : we know force, F = qE where q is charge and E is electrostatic field. here q = 1 C and E = 2 N/C along x - axis so the force along x - axis , F = 1 C × 2N /C = 2 N displacement along x - axis , s = 2.5 m work done = force × displacement along force = 2 N × 2.5 m = 5 Nm = 5J Therefore the workdone on the charge 1 C in an electrostatic field 2 N/C along x - axis is 5 J

12.

Calculate work done on charge 1C in an electrostatic field 2 Newton/c alongx axis when charge is moved the through adistance2.5 m along+x-axis

Answer»

ave to calculate the WORK DONE on charge 1 C in an electrostatic field 2 N/C along x - axis when charge is moved through a DISTANCE 2.5 m along +x axis.

solution : we know force, F = qE

where q is charge and E is electrostatic field.

here q = 1 C and E = 2 N/C along x - axis

so the force along x - axis , F = 1 C × 2N /C = 2 N

displacement along x - axis , s = 2.5 m

work done = force × displacement along force

= 2 N × 2.5 m

= 5 Nm = 5J

Therefore the workdone on the charge 1 C in an electrostatic field 2 N/C along x - axis is 5 J

Discussion

13.	Evaluate the following integral
Answer» ong>Answer: solve the indefinite integral trying to find the PRIMITIVE (or anti-derivative) of your integrand; this is a function that DERIVED will give you sin (x):∫sin(x)dx=−cos(x) After that we use the Fundamental Theorem of Calculus where, BASICALLY, we take our Primitive, we stick in first our upper extreme π/2 then the lower one 0 and subtract the values we obtain: −cos(π/2)−(−cos0))=1 so we get: ∫π/20 sin(x)dx=1 Therefore, the answer is 1. I am still in 9 th and TRIED my best. Hope it helps. If you want to know more about MATHEMATICS then you can visit my YouTube channel. The name of my channel is Samanyu Pattanayak

13.

Evaluate the following integral

Answer»

ong>Answer:

solve the indefinite integral trying to find the PRIMITIVE (or anti-derivative) of your integrand; this is a function that DERIVED will give you

sin

(x):∫sin(x)dx=−cos(x)

After that we use the Fundamental Theorem of Calculus where, BASICALLY, we take our Primitive, we stick in first our upper extreme

π/2

then the lower one

0

and subtract the values we obtain:

−cos(π/2)−(−cos0))=1

so we get:

∫π/20 sin(x)dx=1

Therefore, the answer is 1.

I am still in 9 th and TRIED my best. Hope it helps.

If you want to know more about MATHEMATICS then you can visit my YouTube channel.

The name of my channel is

Samanyu Pattanayak

Discussion

14.	The correct way of writing :34 Newton34 Newtons34 newton34 newtons
Answer» ewton . HOPE it will HELPFUL for you...

14.

The correct way of writing :34 Newton34 Newtons34 newton34 newtons

Answer»

ewton .

HOPE it will HELPFUL for you...

Discussion

15.	1 )You are Arun/Anita Basu living at 1785, Sector 29, Chandigarh. You camne serons the following Postal Classes-Diploma in Waste Water Management duration one year--practiunla arrangedminimum qualification SSCE first division-prospectus free-Contact Director, Eco-centre, P.B. 1927advertisement:Bengaluru-560019Write a letter to the Director asking for detailed information on the course, fee structure,assignments, personal contact programmes and job opportunities. Request for a prospectusand enclose a self-addressed envelope.(Word limit: 120-150) pls answer it fast..........and good ni8 to everyone
Answer» ong>ANSWER: 560019 I hope answer is HELPFUL to us please follow me and GIVE THANKS

15.

1 )You are Arun/Anita Basu living at 1785, Sector 29, Chandigarh. You camne serons the following Postal Classes-Diploma in Waste Water Management duration one year--practiunla arrangedminimum qualification SSCE first division-prospectus free-Contact Director, Eco-centre, P.B. 1927advertisement:Bengaluru-560019Write a letter to the Director asking for detailed information on the course, fee structure,assignments, personal contact programmes and job opportunities. Request for a prospectusand enclose a self-addressed envelope.(Word limit: 120-150) pls answer it fast..........and good ni8 to everyone

Answer»

ong>ANSWER:

560019

I hope answer is HELPFUL to us

please follow me and GIVE THANKS

Discussion

16.	an aircraft executes a horizontal loop at a speed of 540km/h with its wing banked at 45 degree .what is the radius of the loop?
Answer» ONG>EXPLANATION: Answer: The radius of the loop is 15.24 km. Step-by-step explanation: Given : An Aeroplane EXECUTES a horizontal loop at a speed of 720 km/h with its wings banked at 45°.

Discussion

17.	Difine parallel ray
Answer» ong>ANSWER: *Two RAYS that lie on the same line or on parallel lines, and point in the same direction. ..*

17.

Difine parallel ray

Answer»

ong>ANSWER:

Two RAYS that lie on the same line or on parallel lines, and point in the same direction. ..

Discussion

18.	Why should we take nood?
Answer» ong>Answer: A food is something that provides nutrients. Nutrients are substances that PROVIDE: energy for ACTIVITY, growth, and all functions of the body such as breathing, digesting food, and keeping warm; materials for the growth and REPAIR of the body, and for keeping the IMMUNE system healthy. Explanation: *I hope it is helpful plz marks me as brainlieast and give me THANKS at all my answers and follow me.* *☺☺ 10 Thanks + Follow = Inbox ☺☺*

18.

Why should we take nood?

Answer»

ong>Answer:

A food is something that provides nutrients. Nutrients are substances that PROVIDE: energy for ACTIVITY, growth, and all functions of the body such as breathing, digesting food, and keeping warm; materials for the growth and REPAIR of the body, and for keeping the IMMUNE system healthy.

Explanation:

I hope it is helpful plz marks me as brainlieast and give me THANKS at all my answers and follow me.

☺☺ 10 Thanks + Follow = Inbox ☺☺

Discussion

19.	Mind question of physics
Answer» ONG>ANSWER: SERIES COMBINATION, 1+2=3ohm Parallel combination, 1/3+1/4=7/12ohm Series combination, 7/12+1=19/12ohm Parallel combination, 1/2+1/1=3/2ohm Series combination, 19/12+3/2=37/12ohm≈3.084ohm

19.

Mind question of physics

Answer» ONG>ANSWER:

SERIES COMBINATION,

1+2=3ohm

Parallel combination,

1/3+1/4=7/12ohm

Series combination,

7/12+1=19/12ohm

Parallel combination,

1/2+1/1=3/2ohm

Series combination,

19/12+3/2=37/12ohm≈3.084ohm

Discussion

20.	Nowadays seeds are conated with ........ Solution
Answer» ONG>ANSWER: hsjshshjsbjsgshhwusisi

Discussion

21.	Why electric current not a vector evae though it has direction
Answer» ong>Answer: because it does not OBEY the laws of parallelogram VECTOR addition Explanation: mark me as the brainliest and also FOLLOW me

21.

Why electric current not a vector evae though it has direction

Answer»

ong>Answer:

because it does not OBEY the laws of parallelogram VECTOR addition

Explanation:

mark me as the brainliest

and also FOLLOW me

Discussion

22.	A thermometer has itssyems marked in mm the lower fixed point is 36mm and the upper fixed point is 180mm, calculate the temperature in degree Celsius when the thermometer read 45mm
Answer» ong>ANSWER: I do not KNOW the answer search on Google and YOUTUBE

22.

A thermometer has itssyems marked in mm the lower fixed point is 36mm and the upper fixed point is 180mm, calculate the temperature in degree Celsius when the thermometer read 45mm

Answer»

ong>ANSWER:

I do not KNOW the answer search on Google and YOUTUBE

Discussion

23.	Bhdhsjajsdndñkkkkbmwjqsuisiisixxixi
Answer» ong>ANSWER: *☺☺ 10 Thanks + Follow = INBOX ☺☺*

23.

Bhdhsjajsdndñkkkkbmwjqsuisiisixxixi

Answer»

ong>ANSWER:

☺☺ 10 Thanks + Follow = INBOX ☺☺

Discussion

24.	A compound microscope consists of an objective lens of focal length 2 cm and an eye-piece of focal length 6.25cm separated by a distance of 15cm .Find the distance of an object from the objective lens so that the final image is formed at 25 cm from the eye.
Answer» ong>Answer: What would you like to ask? 12th Physics Ray Optics and OPTICAL Instruments Optical Instruments : MICROSCOPE A compound microscope consi... PHYSICS A compound microscope consists of an objective LENS of focal length 2.0cm and an eyepiece of focal length 6.25cm separated by a distance of 15cm. How far from the objective should an object be PLACED in order to OBTAIN the final image at: (a) the least distance of distinct vision (25cm), and (b) at infinity? What is the magnifying power of the microscope in each case? MEDIUM Help best friend Study later VIDEO EXPLANATION ANSWER Focal length of the objective lens f1=2cm Focal length of the eyepiece,f2=6.25cm Distance between the objective lens and the eyepiece,d=15cm Least distance of distinct vision,d′=25cm Image distance for the eyepiece,v2=−25cm bject distance for the eyepiece = u2 According to the lens formula f21=v21−u21 6.251=−251−u21 u2=−5cm Image distance for the objective lens v1=d+u Explanation: HOPE IT HELPS. PLEASE MARK ME AS BRAINLIEST. THANKS...

24.

A compound microscope consists of an objective lens of focal length 2 cm and an eye-piece of focal length 6.25cm separated by a distance of 15cm .Find the distance of an object from the objective lens so that the final image is formed at 25 cm from the eye.

Answer»

ong>Answer:

What would you like to ask?

12th

Physics

Ray Optics and OPTICAL Instruments

Optical Instruments : MICROSCOPE

A compound microscope consi...

PHYSICS

A compound microscope consists of an objective LENS of focal length 2.0cm and an eyepiece of focal length 6.25cm separated by a distance of 15cm. How far from the objective should an object be PLACED in order to OBTAIN the final image at:

(a) the least distance of distinct vision (25cm), and

(b) at infinity? What is the magnifying power of the microscope in each case?

MEDIUM

Help best friend

Study later

VIDEO EXPLANATION

ANSWER

Focal length of the objective lens f1=2cm

Focal length of the eyepiece,f2=6.25cm

Distance between the objective lens and the eyepiece,d=15cm

Least distance of distinct vision,d′=25cm

Image distance for the eyepiece,v2=−25cm

bject distance for the eyepiece = u2

According to the lens formula

f21=v21−u21

6.251=−251−u21

u2=−5cm

Image distance for the objective lens v1=d+u

Explanation:

HOPE IT HELPS. PLEASE MARK ME AS BRAINLIEST. THANKS...

Discussion

25.	Two resistors of resistance 3ohm and 6 ohm are connected to a battery of 6 V , so as to have minimum resistance. Show how will you connect them (diagram) and also find the current in this case.
Answer» ong>Given Two resistors of resistance 3 Ohm and 6 Ohm are connected to a BATTERY of 6 V To Find How to connect them for getting minimum resistance Knowledge Required When resistors are connected in SERIES , $\bf \bigstar\ \; \pink{R_{eq}=R_1+R_2+R_3+...}$ When resistors are connected in parallel , $\bf \bigstar\ \; \green{\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}+...}$ Ohms Law : $\bf \bigstar\ \; \blue{V=IR}$ where , V denotes POTENTIAL difference I denotes CURRENT R denotes resistance Solution When 3 and 6 Ω are connected in series , $\rm R_{eq}=3+6\\\\\implies \bf R_{eq}=9\ \Omega$ When these are connected in parallel , $\rm \dfrac{1}{R_{eq}}=\dfrac{1}{3}+\dfrac{1}{6}\\\\\implies \rm \dfrac{1}{R_{eq}}=\dfrac{3}{6}\\\\\implies \rm R_{eq}=\dfrac{6}{3}\\\\\implies \bf R_{eq}=2\ \Omega$ So , We will get minimum resistance , when connected in parallel . __________________________ Eq. Resistance = 2 Ω Potential Difference = 6 V Apply Ohms Law , $\bf \red{\bigstar\ \; V=IR_{eq}}\\\\\rm \implies 6=I(2)\\\\\implies \rm I=\dfrac{6}{2}\\\\\implies \bf \orange{I=3\ A\ \; \bigstar}$ So , Current = 3 A

25.

Two resistors of resistance 3ohm and 6 ohm are connected to a battery of 6 V , so as to have minimum resistance. Show how will you connect them (diagram) and also find the current in this case.

Answer»

ong>Given

Two resistors of resistance 3 Ohm and 6 Ohm are connected to a BATTERY of 6 V

To Find

How to connect them for getting minimum resistance

Knowledge Required

When resistors are connected in SERIES ,

$\bf \bigstar\ \; \pink{R_{eq}=R_1+R_2+R_3+...}$

When resistors are connected in parallel ,

$\bf \bigstar\ \; \green{\dfrac{1}{R_{eq}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}+...}$

Ohms Law :

$\bf \bigstar\ \; \blue{V=IR}$

where ,

V denotes POTENTIAL difference

I denotes CURRENT

R denotes resistance

Solution

When 3 and 6 Ω are connected in series ,

$\rm R_{eq}=3+6\\\\\implies \bf R_{eq}=9\ \Omega$

When these are connected in parallel ,

$\rm \dfrac{1}{R_{eq}}=\dfrac{1}{3}+\dfrac{1}{6}\\\\\implies \rm \dfrac{1}{R_{eq}}=\dfrac{3}{6}\\\\\implies \rm R_{eq}=\dfrac{6}{3}\\\\\implies \bf R_{eq}=2\ \Omega$

So , We will get minimum resistance , when connected in parallel .

__________________________

Eq. Resistance = 2 Ω
Potential Difference = 6 V

Apply Ohms Law ,

$\bf \red{\bigstar\ \; V=IR_{eq}}\\\\\rm \implies 6=I(2)\\\\\implies \rm I=\dfrac{6}{2}\\\\\implies \bf \orange{I=3\ A\ \; \bigstar}$

So , Current = 3 A

Discussion

26.	Can 2 magnetic field lines intersect each other ? give reason for your answer
Answer» ong>EXPLANATION: No, two magnetic LINES of force cannot intersect each other. If two field lines intersect, there WOULD be two directions of magnetic field at that POINT which is not possible. Hope it works..✌ Please mark it as brainliest

26.

Can 2 magnetic field lines intersect each other ? give reason for your answer

Answer»

ong>EXPLANATION:

No, two magnetic LINES of force cannot intersect each other. If two field lines intersect, there WOULD be two directions of magnetic field at that POINT which is not possible.

Hope it works..✌

Please mark it as brainliest

Discussion

27.	Who is the chief administrative officer of the UN?
Answer» ong>Answer: Secretary-GENERAL Explanation: The CHARTER describes the Secretary-General as "CHIEF administrative officer" of the Organization, who SHALL act in that capacity and perform "such other functions as are entrusted" to him or her by the Security Council, General Assembly, Economic and Social Council and other United Nations ORGANS.

27.

Who is the chief administrative officer of the UN?

Answer»

ong>Answer:

Secretary-GENERAL

Explanation:

The CHARTER describes the Secretary-General as "CHIEF administrative officer" of the Organization, who SHALL act in that capacity and perform "such other functions as are entrusted" to him or her by the Security Council, General Assembly, Economic and Social Council and other United Nations ORGANS.

Discussion

28.	limitations of Newton's law of gravitation.... Three points... (No useless things allowed otherwise you will be reported) It's urgent please help i will tag brainliest....
Answer» ONG>ANSWER: gravitational force will be 9.8 METER per SECOND Mark as brilliant

28.

limitations of Newton's law of gravitation.... Three points... (No useless things allowed otherwise you will be reported) It's urgent please help i will tag brainliest....

Answer» ONG>ANSWER:

gravitational force will be 9.8 METER per SECOND

Mark as brilliant

Discussion

29.	Ii) a) 2H,BO3(aq)Given the following equations and A Hºvalues at 25° C,> B,0316) +3H2OAH° = +14.4 kJb) HBO3(aq)HBO+H2OAH° = -0.02 kJ176) 2B,036) + H2OAH° = 17.3 kJCalculate A Hº for the following reactionProgramme -GENIUS Learning!(1)c) H.B.076)at 298 K4HBO2(aq)H,B,0,0) + H2OAH = ?
Answer» ONG>ANSWER: I can't UNDERSTAND your QUESTION

Discussion

30.	if two forces act in opposite direction then their resultant is 10 Newton and if they act mutually perpendicular then their resultant is 50 newtan find the magnitude of both the forces
Answer» ong>Answer: ANSWER If the forces act as in the opposite direction then, F 1 −F 2 =10N...........1 And if they both act as a perpendicular then F 1 2 +F 2 2 =50N..............2 From equation 1 we GET F 1 =10+F 2 put this VALUE in equation 2 then we get, (F 2 +10) 2 +F 2 2 =50 2 ⇒F 2 2 +F 2 2 +100+2F 2 =2500 ⇒2F 2 2 +2F 2 −2400=0 ⇒F 2 2 +40F 2 −30F 2 −1200=0 ⇒F 2 (F 2 +40)−30(F 2 +40) ⇒(F 2 −30)(F 2 +40) ⇒F 2 =30N Put this value in equation 1 then we get, F 1 =10+30=40N Explanation: PLEASE MARK AS BILLIANT FOLLOW ME THANK ME

30.

if two forces act in opposite direction then their resultant is 10 Newton and if they act mutually perpendicular then their resultant is 50 newtan find the magnitude of both the forces

Answer»

ong>Answer:

ANSWER

If the forces act as in the opposite direction then,

F

1

−F

2

=10N...........1

And if they both act as a perpendicular then

F

1

2

+F

2

=50N..............2

From equation 1 we GET F

1

=10+F

2

put this VALUE in equation 2 then we get,

(F

2

+10)

2

+F

2

=50

2

⇒F

2

+F

2

+100+2F

2

=2500

⇒2F

2

+2F

2

−2400=0

⇒F

2

+40F

2

−30F

2

−1200=0

⇒F

2

(F

2

+40)−30(F

2

+40)

⇒(F

2

−30)(F

2

+40)

⇒F

2

=30N

Put this value in equation 1 then we get,

F

1

=10+30=40N

Explanation:

PLEASE MARK AS BILLIANT

FOLLOW ME

THANK ME

Discussion

31.	Which of the following device converts electric energy to electric current? (a) An electric cell(b) Electric wires(c) An electric bulb (d) A switch
Answer» ONG>Answer: A) An ELECTRIC cell. HOPE the answer is correct✅

31.

Which of the following device converts electric energy to electric current? (a) An electric cell(b) Electric wires(c) An electric bulb (d) A switch

Answer» ONG>Answer:

A) An ELECTRIC cell.

HOPE the answer is correct✅

Discussion

32.	Slove above picture question
Answer» ong>ANSWER: MARK me BRAINLIEST plz

32.

Slove above picture question

Answer»

ong>ANSWER:

MARK me BRAINLIEST plz

Discussion

33.	A train acelerated from 10 km/her to 40 km/hin a 2 minutes. how much distance would itan this period
Answer» $u = 10 \: km {}^{ - 1} = 2.7 \: ms {}^{ - 1}$ $v = 40 \: km {}^{ - 1} = 11.1 \: \: ms {}^{ - 1}$ $t = 2 \: minutes = 120 \: sec$ $a = ?$ $a = \frac{v - u}{t}$ $a = \frac{11.1 - 2.7}{120}$ $\huge\pink{\boxed{\purple{a = 0.07 \: ms {}^{ - 2}}}}$ For Calculating Distance, $\huge\pink{s = ut + \frac{1}{2} at {}^{2} }$ $\large{s = 2.7 \times 120 + \frac{1}{2} \times 0.07 \times 120 \times 120}$ $\large{s = 324 + 504}$ $\huge\green{\boxed{\purple{s = 828 \: meter}}}$ $\huge\pink{\underline{\underline{\mathbb{\orange{BrAInLIesT}}}}}$

33.

A train acelerated from 10 km/her to 40 km/hin a 2 minutes. how much distance would itan this period

Answer»

$u = 10 \: km {}^{ - 1} = 2.7 \: ms {}^{ - 1}$

$v = 40 \: km {}^{ - 1} = 11.1 \: \: ms {}^{ - 1}$

$t = 2 \: minutes = 120 \: sec$

$a = ?$

$a = \frac{v - u}{t}$

$a = \frac{11.1 - 2.7}{120}$

$\huge\pink{\boxed{\purple{a = 0.07 \: ms {}^{ - 2}}}}$

For Calculating Distance,

$\huge\pink{s = ut + \frac{1}{2} at {}^{2} }$

$\large{s = 2.7 \times 120 + \frac{1}{2} \times 0.07 \times 120 \times 120}$

$\large{s = 324 + 504}$

$\huge\green{\boxed{\purple{s = 828 \: meter}}}$

$\huge\pink{\underline{\underline{\mathbb{\orange{BrAInLIesT}}}}}$

Discussion

34.	Is the centre of mass independent of the reference frame chosen?
Answer» ong>Answer: Yes! Here is your answer! Explanation: The position of centre of mass does not depend upon the REFERENCE frame. Centre of mass DEPENDS only upon the mass of the body. ... Any choice of reference frame will give the same position for the centre of mass.

34.

Is the centre of mass independent of the reference frame chosen?

Answer»

ong>Answer:

Yes! Here is your answer!

Explanation:

The position of centre of mass does not depend upon the REFERENCE frame. Centre of mass DEPENDS only upon the mass of the body. ... Any choice of reference frame will give the same position for the centre of mass.

Discussion

35.	What is the resultant of vector?
Answer» ONG>Answer: The resultant is the VECTOR sum of two or more vectors. It is the result of ADDING two or more vectors together. When displacement vectors are ADDED, the result is a resultant displacement. But any two vectors can be added as long as they are the same vector quantity.

Discussion

36.	1 mole propore (GH) on arbuston TP Kilo Toules of heat eroagehehralod cohor - pepontonombuston at S.TP.
Answer» ONG>ANSWER: THANKS for FREE points

Discussion

37.	What is the symbol means side of M in Physics But it's not apostrophe
Answer» RY I cannot ABL to UNDERSTAND

Discussion

38.	Raat ko Lmbe Lmbe sans lenaa jroori hai
Answer» ONG>ANSWER: no bro Explanation: NOTHING happens

38.

Raat ko Lmbe Lmbe sans lenaa jroori hai

Answer» ONG>ANSWER:

no bro

Explanation:

NOTHING happens

Discussion

39.	Using superposition theorem find the voltage across 3ohms resistance
Answer» ONG>Answer: sorry I don't KNOW the answer Explanation: please EXPLAIN the QUESTION

39.

Using superposition theorem find the voltage across 3ohms resistance

Answer» ONG>Answer:

sorry I don't KNOW the answer

Explanation:

please EXPLAIN the QUESTION

Discussion

40.	Velocity of an object is changed by changing
Answer» ONG>Answer: (i) DISPLACEMENT (II) Time

40.

Velocity of an object is changed by changing

Answer» ONG>Answer:

(i) DISPLACEMENT

(II) Time

Discussion

41.	Wʜᴀᴛ ɪs ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴏғ ᴘʟᴀɴᴇ ᴍɪʀʀᴏʀ? ᴛʜᴇ ʙᴇsᴛ ᴀɴsᴡᴇʀ ᴡɪʟʟ ʙᴇ ᴍᴀʀᴋ ᴀs ʙʀɪʟʟɪᴀɴᴛ !
Answer» ong>ANSWER: +1 Explanation: The MAGNIFICATION produced by a plane mirror is +1 means that the image formed is VIRTUAL, ERECT and of the same size as that of OBJECT.

41.

Wʜᴀᴛ ɪs ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴏғ ᴘʟᴀɴᴇ ᴍɪʀʀᴏʀ? ᴛʜᴇ ʙᴇsᴛ ᴀɴsᴡᴇʀ ᴡɪʟʟ ʙᴇ ᴍᴀʀᴋ ᴀs ʙʀɪʟʟɪᴀɴᴛ !

Answer»

ong>ANSWER:

+1

Explanation:

The MAGNIFICATION produced by a plane mirror is +1 means that the image formed is VIRTUAL, ERECT and of the same size as that of OBJECT.

Discussion

42.	Round pff the following number to three significant figures a.3.264b.0.9462c.1. 667d.1.285e.45.875
Answer» ONG>Answer: B. 0.9462 Explanation: OK bye good NIGHT

42.

Round pff the following number to three significant figures a.3.264b.0.9462c.1. 667d.1.285e.45.875

Answer» ONG>Answer:

B. 0.9462

Explanation:

OK bye good NIGHT

Discussion

43.	4. Match the following Lulus. Column 'A(a) Datum(b) Isobath(c) Topo sheet 45D/7(d) Telephone line(e) Hamlet() Canal(3) MetropolisColumn 'B'3. (i) Lines joining areas of equal depth(ii) Rural1. (ii) Mean sea level(iv) Sirohi4 (v) Communication(vi) Urban(vii) Irrigation
Answer» ONG>Answer: I can't UNDERSTAND this SORRY

Discussion

44.	A students can run 100m distance in 8 second find his speed
Answer» ONG>Answer: 12.5m/s. Explanation: SPEED = DISTANCE ÷ Time Distance = 100m Time = 8sec Speed = 100/8 = 25/2 = 12.5m/s.

44.

A students can run 100m distance in 8 second find his speed

Answer» ONG>Answer:

12.5m/s.

Explanation:

SPEED = DISTANCE ÷ Time

Distance = 100m

Time = 8sec

Speed = 100/8

= 25/2

= 12.5m/s.

Discussion

45.	1. Calculate the weight of a 50kg mass on Earth (note g = 9.8N/kg) 2. Calculate the weight of a 200kg mass on Earth 3. On Jupiter the gravity measures 23N/kg. Calculate the mass of a rock which has a weight of 4600N. 4. Calculate the weight that the same rock would have on Earth. 5. A 20N force acts at an angle of 25 degrees to the horizontal. Resolve the force to find it's horizontal and vertical components
Answer» ong>Answer: 1. WEIGHT is given by the FORMULA, W=mg. On EARTH, g=9.8 m/s2 . So, the OBJECT's weight on Earth will be: W=50 kg⋅9.8 m/s2. =490 N. 2. Calculate this one just as I did above PLEASE, MARK ME AS BRAINLIEST!

45.

1. Calculate the weight of a 50kg mass on Earth (note g = 9.8N/kg) 2. Calculate the weight of a 200kg mass on Earth 3. On Jupiter the gravity measures 23N/kg. Calculate the mass of a rock which has a weight of 4600N. 4. Calculate the weight that the same rock would have on Earth. 5. A 20N force acts at an angle of 25 degrees to the horizontal. Resolve the force to find it's horizontal and vertical components

Answer»

ong>Answer:

1. WEIGHT is given by the FORMULA,

W=mg.

On EARTH, g=9.8 m/s2 . So, the OBJECT's weight on Earth will be:

W=50 kg⋅9.8 m/s2.

=490 N.

2. Calculate this one just as I did above

PLEASE, MARK ME AS BRAINLIEST!

Discussion

46.	Q.6) if ten coins are tossed then what is probability of getting all heads?
Answer» 10 unbaised coins are tossed, the NUMBER of sample points are equal to 2^10 n (S)= 2^10=1024 Out of the 1024 INSTANCES that can happen , only one instance is of getting all the ten as heads.Let that event be A n (A)=1 P(A)=n (A)/ n (S) P (A) = 1/1024 P(A)=0.0009765625 So that's your answer. I HOPE IT HELPS ☺️ FOLLOW ME DUDE (✿ ♡‿♡)

46.

Q.6) if ten coins are tossed then what is probability of getting all heads?

Answer» 10 unbaised coins are tossed, the NUMBER of sample points are equal to 2^10

n (S)= 2^10=1024

Out of the 1024 INSTANCES that can happen , only one instance is of getting all the ten as heads.Let that event be A

n (A)=1

P(A)=n (A)/ n (S)

P (A) = 1/1024

P(A)=0.0009765625

So that's your answer.

I HOPE IT HELPS ☺️ FOLLOW ME DUDE (✿ ♡‿♡)

Discussion

47.	B) A force of 2N is applied on a body of mass 10kg for 5s. Calculate change in momentum, change in velocity and accelerationproduced in the body.
Answer» ONG>ANSWER: F=M×A HOW 2N = 10KG ×acceleration

47.

B) A force of 2N is applied on a body of mass 10kg for 5s. Calculate change in momentum, change in velocity and accelerationproduced in the body.

Answer» ONG>ANSWER:

F=M×A

HOW 2N = 10KG ×acceleration

Discussion

48.	प्रकृति का मूल बल नही है गरुत्वाकर्षणविद्युतचुम्बकीयनाभिकीयअभिकेंद्रChoose only one please help
Answer» ONG>Answer: MAYBE....... obtion (c) EXPLANATION: i can't understand hindi

48.

प्रकृति का मूल बल नही है गरुत्वाकर्षणविद्युतचुम्बकीयनाभिकीयअभिकेंद्रChoose only one please help

Answer» ONG>Answer:

MAYBE....... obtion (c)

EXPLANATION:

i can't understand hindi

Discussion

49.	1.How many significant figures are there in the following quantities ? a.10.163b.1. 67×10-17 c.0.270d.1.496e.15000f.2. 4300g.0.001040
Answer» ONG>ANSWER: a.5 b.3 c.4 d.4 e.2 f.3 g.6

49.

1.How many significant figures are there in the following quantities ? a.10.163b.1. 67×10-17 c.0.270d.1.496e.15000f.2. 4300g.0.001040

Answer» ONG>ANSWER:

a.5

b.3

c.4

d.4

e.2

f.3

g.6

Discussion

50.	What is energy give its si unit and dimensions
Answer» ONG>Answer: the ability of doing WORK SI unit is JOULE

Discussion

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