67486 + Interview Questions in Secondary School in Physics

1.	PLEASE HELP PHYSICS CHAPTER ENERGY
Answer» ANSWER: KHUD karoo EXPLANATION: mere liya bethagee EXAM me bhi chal nikal peehli fursat ma

1.

PLEASE HELP PHYSICS CHAPTER ENERGY

Answer»

ANSWER:

KHUD karoo

EXPLANATION:

mere liya bethagee EXAM me bhi

chal nikal peehli fursat ma

Discussion

2.	Two objects of charge 2Q and -Q have force" F" between them. If they are touched with each otherand separated then force between them becomesA) FC) F/2B) F/4D) F/8
Answer» Answer:an instrument for writing or DRAWING with INK, typically consisting of a METAL nib or ball, or a NYLON tip, fitted into a metal or plastic holder Explanation:plz mark me as a BRAINLIEST

2.

Two objects of charge 2Q and -Q have force" F" between them. If they are touched with each otherand separated then force between them becomesA) FC) F/2B) F/4D) F/8

Answer»

Answer:an instrument for writing or DRAWING with INK, typically consisting of a METAL nib or ball, or a NYLON tip, fitted into a metal or plastic holder

Explanation:plz mark me as a BRAINLIEST

Discussion

3.	A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.
Answer» Given :- Height of OBJECT = O = 2.5 cm Focal length = f = 15 cm Object distance = u = -30 cm Using LENS Formula, 1/V - 1/u = 1/f 1/v - (-1/30) = 1/15 1/v = 1/15 - 1/30 1/v = 2-1/30 v = 30 cm Again, m = I/O = v/u I/2.5 = 30/-30 I = -2.5 cm Hence, From this we CONCLUDE that Height of Image is same as height of Object.

3.

A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.

Answer»

Given :-

Height of OBJECT = O = 2.5 cm

Focal length = f = 15 cm

Object distance = u = -30 cm

Using LENS Formula,

1/V - 1/u = 1/f

1/v - (-1/30) = 1/15

1/v = 1/15 - 1/30

1/v = 2-1/30

v = 30 cm

Again,

m = I/O = v/u

I/2.5 = 30/-30

I = -2.5 cm

Hence,

From this we CONCLUDE that Height of Image is same as height of Object.

Discussion

4.	A stone is projected from a point on the ground in a direction to hit a bird on the top of a telegraph post of height h, it attains a maximum height 2h above the ground otherwise. If at the in.stant of projection the bird were to fly away horizontally with a uniform speed, find the ratio of the horizontal velocities of the bird and the stone if the stone still hits the bird
Answer» $\bf\huge{ANSWER}$ ASSUME THAT : Let's consider θ be the angle of projection and u be the velocity of projection. According to the situation shown in figure it is given that maximum height of projectile is 2 h ,we have . $\bf{ = > u \: sin \: θ = \sqrt{4gh} }$ • => If time taken by the projectile to reach points A and B are t 1 and t 2 respectively then ROOTS of equations are t 1 and t 2 . Here now refer the attachment : Solving : $\bf{= > t = \frac{u \: sin \: θ}{g} ± \frac{ \sqrt{u \: sin \:θ - 2gh} }{g} } \\$ USING : $\bf {= > t = \sqrt{ \frac{4h}{g} } ± \sqrt{ \frac{2h}{g} } } \\$ Here we have : $\bf{ = > t \: 1 = \sqrt{ \frac{4h}{g} } - \sqrt{ \frac{2h}{g} } } \\$ $\bf{and}$ $\bf{ = > t \: 2 = \sqrt{ \frac{4h}{g} } - \sqrt{ \frac{2h}{g} } } \\$ Here : Now distance AB can be WRITTEN as $\bf{ = > v \: t \: 2 = u \: cos \: θ(t \: 2 - t \: 1)} \\$ Ratio of horizontal velocity : $\bf{ = > \frac{v}{u \: cos \: θ} = \frac{t \: 2 - t \: 1}{t \: 2} } \\$ $\bf \large{ = > \frac{2}{ \sqrt{2} + 1 } } \\$ $\bf \boxed{ = > \frac{2}{ \sqrt{2} + 1 } }$ #Answer with quality #Bal NOTE: Please refer the 2 nd attachment to see second method to solve this question Kindly refer all THREE attachment. ________________ Here is User ALEXANDER ANSWER [tex]\bf\huge\orange{ANSWER}[/tex] $\bf\huge\pink{Here}$ $\bf{ = >2h = \frac{Vo²si {n}^{2} θ} {2g} } \\$ $\bf{ = >Vo = \frac{2 \sqrt{gh} }{si {n}^{2}θ } } \\$ $\bf\huge\pink{Also}$ $\bf{ = > y = Vo \: sin \: θ \: t - \frac{1}{2} \: g {t}^{2} }\\$ $\bf{ = > h = \frac{2 \sqrt{gh} }{sin \: θ}.sin \: θ \: t - \frac{1}{2} {gt}^{2} } \\$ $\bf{ = > {gt}^{2} - 4 \sqrt{gh}t + 2h = 0} \\$ $\bf{ = > t = \frac{4 \sqrt{gh}±2 \sqrt{2gh} }{2g} } \\$ $\bf {= > t \: 1 = \sqrt{ \frac{h}{g} } \: (2 - 2 \sqrt{2} )} \\$ $\bf {= > t \: 2 = \sqrt{ \frac{h}{g} } \: (2 + 2 \sqrt{2} )} \\$ $\bf\huge\red{Therefore}$ $\bf{ = > Vt²=Va \: Cos \: θ (t2 -t1 )}$ $\bf{ = > \frac{V}{Va \: Cos \: θ } = \frac{t \: 2 - \: t \: 1}{t \: 2} } \\$ $\bf { = > \frac{2}{ \sqrt{2} + 1 } } \\$ $\bf\huge\blue{Ratio}$ $\sf \huge{ = > \frac{2}{ \sqrt{2} + 1} }$ Note: Kindly refer the attachment to see full answer solve by USER ALEXANDER

4.

A stone is projected from a point on the ground in a direction to hit a bird on the top of a telegraph post of height h, it attains a maximum height 2h above the ground otherwise. If at the in.stant of projection the bird were to fly away horizontally with a uniform speed, find the ratio of the horizontal velocities of the bird and the stone if the stone still hits the bird

Answer»

$\bf\huge{ANSWER}$

ASSUME THAT :

Let's consider θ be the angle of projection and u be the velocity of projection.
According to the situation shown in figure it is given that maximum height of projectile is 2 h ,we have .

$\bf{ = > u \: sin \: θ = \sqrt{4gh} }$

• => If time taken by the projectile to reach points A and B are t 1 and t 2 respectively then ROOTS of equations are t 1 and t 2 .

Here now refer the attachment :

Solving :

$\bf{= > t = \frac{u \: sin \: θ}{g} ± \frac{ \sqrt{u \: sin \:θ - 2gh} }{g} } \\$

USING :

$\bf {= > t = \sqrt{ \frac{4h}{g} } ± \sqrt{ \frac{2h}{g} } } \\$

Here we have :

$\bf{ = > t \: 1 = \sqrt{ \frac{4h}{g} } - \sqrt{ \frac{2h}{g} } } \\$

$\bf{and}$

$\bf{ = > t \: 2 = \sqrt{ \frac{4h}{g} } - \sqrt{ \frac{2h}{g} } } \\$

Here :

Now distance AB can be WRITTEN as

$\bf{ = > v \: t \: 2 = u \: cos \: θ(t \: 2 - t \: 1)} \\$

Ratio of horizontal velocity :

$\bf{ = > \frac{v}{u \: cos \: θ} = \frac{t \: 2 - t \: 1}{t \: 2} } \\$

$\bf \large{ = > \frac{2}{ \sqrt{2} + 1 } } \\$

$\bf \boxed{ = > \frac{2}{ \sqrt{2} + 1 } }$

#Answer with quality
#Bal

NOTE:

Please refer the 2 nd attachment to see second method to solve this question
Kindly refer all THREE attachment.

________________

Here is User

ALEXANDER ANSWER

[tex]\bf\huge\orange{ANSWER}[/tex]

$\bf\huge\pink{Here}$ $\bf{ = >2h = \frac{Vo²si {n}^{2} θ} {2g} } \\$

$\bf{ = >Vo = \frac{2 \sqrt{gh} }{si {n}^{2}θ } } \\$

$\bf\huge\pink{Also}$

$\bf{ = > y = Vo \: sin \: θ \: t - \frac{1}{2} \: g {t}^{2} }\\$

$\bf{ = > h = \frac{2 \sqrt{gh} }{sin \: θ}.sin \: θ \: t - \frac{1}{2} {gt}^{2} } \\$

$\bf{ = > {gt}^{2} - 4 \sqrt{gh}t + 2h = 0} \\$

$\bf{ = > t = \frac{4 \sqrt{gh}±2 \sqrt{2gh} }{2g} } \\$

$\bf {= > t \: 1 = \sqrt{ \frac{h}{g} } \: (2 - 2 \sqrt{2} )} \\$

$\bf {= > t \: 2 = \sqrt{ \frac{h}{g} } \: (2 + 2 \sqrt{2} )} \\$

$\bf\huge\red{Therefore}$ $\bf{ = > Vt²=Va \: Cos \: θ (t2 -t1 )}$

$\bf{ = > \frac{V}{Va \: Cos \: θ } = \frac{t \: 2 - \: t \: 1}{t \: 2} } \\$ $\bf { = > \frac{2}{ \sqrt{2} + 1 } } \\$

$\bf\huge\blue{Ratio}$ $\sf \huge{ = > \frac{2}{ \sqrt{2} + 1} }$

Note:

Kindly refer the attachment to see full answer solve by USER ALEXANDER

Discussion

5.	Which of the following points about specific resostance is false
Answer» Answer: Option D specific resistance of the MATERIAL is ALSO CALLED resistor vati this is false option

5.

Which of the following points about specific resostance is false

Answer»

Answer:

Option D

specific resistance of the MATERIAL is ALSO CALLED resistor vati

this is false option

Discussion

6.	I WANT PHYSICS WORKSHEET WITH SOLUTIONS ON FORCE, WORK,MACHINES ,LIGHT FOR CLASS 10 ICSE. SOMEONE PLEASE SEND
Answer» ANSWER: hiiiiiiiiii good MORNING

6.

I WANT PHYSICS WORKSHEET WITH SOLUTIONS ON FORCE, WORK,MACHINES ,LIGHT FOR CLASS 10 ICSE. SOMEONE PLEASE SEND

Answer»

ANSWER:

hiiiiiiiiii

good MORNING

Discussion

7.	DERIVE THE EQUATION OF KINETIC ENERGY BY USING CALCULUSCORRECT SOLUTION WILL BE MARKED AS BRAINLIEST ANSWER
Answer» DERIVATION of EQUATION of KINETIC ENERGY by CALCULUS - K.E. = 1/2 mv^2

Discussion

8.	Jisko free ke point ?s mskskdkdjdjdjjdjdjsjjejwGood morning .Hi how r comme on meeetoturpwutxb
Answer» ANSWER: BHAI mere answer KO brainleast answer select kr do PLZ

8.

Jisko free ke point ?s mskskdkdjdjdjjdjdjsjjejwGood morning .Hi how r comme on meeetoturpwutxb

Answer»

ANSWER:

BHAI mere answer KO brainleast answer select kr do PLZ

Discussion

9.	The cause of surface tenction is
Answer» ANSWER: The surface tension arises DUE to COHESIVE INTERACTIONS between the MOLECULES in the liquid. At the bulk of the liquid, the molecules have neighboring molecules on each side. As explained, the cohesive force between the molecules causes surface tension. The stronger the cohesive force, the stronger the surface tension Explanation:

9.

The cause of surface tenction is

Answer»

ANSWER:

The surface tension arises DUE to COHESIVE INTERACTIONS between the MOLECULES in the liquid. At the bulk of the liquid, the molecules have neighboring molecules on each side. As explained, the cohesive force between the molecules causes surface tension. The stronger the cohesive force, the stronger the surface tension

Explanation:

Discussion

10.	Among the following, the set of fundamental physical quantities is/area) {mass, length, time)b) (force, length, time)c) (energy, length, time)d) All the above
Answer» Answer: Option:(1) mass, LENGTH and time Can you PLS mark my answer as BRAINLIEST

10.

Among the following, the set of fundamental physical quantities is/area) {mass, length, time)b) (force, length, time)c) (energy, length, time)d) All the above

Answer»

Answer:

Option:(1)

mass, LENGTH and time

Can you PLS mark my answer as BRAINLIEST

Discussion

11.	Solved Examples 0.4. Using the ideal gas equation, determine the value of R. Given that one gram molecule of a gas at S.T.P. occupies 22.4 litre. Solutions
Answer» HELLO... GOOD MORNING... BY THE WAY... DATK ESS KO TUM JANTE KAISE HO... BATAOGE OR NOT...

11.

Solved Examples 0.4. Using the ideal gas equation, determine the value of R. Given that one gram molecule of a gas at S.T.P. occupies 22.4 litre. Solutions

Answer»

HELLO...

GOOD MORNING...

BY THE WAY...

DATK ESS KO TUM JANTE KAISE HO...

BATAOGE OR NOT...

Discussion

12.	I think my all friends is busy ya offline okk
Answer» ANSWER: I an TAKING POINT LENE do

12.

I think my all friends is busy ya offline okk

Answer»

ANSWER:

I an TAKING POINT LENE do

Discussion

13.	a particle is thrown with initial speed u at angle '∅', with the horizontal, under gravity. the relation between maximum height 'h' and range upon level ground 'R' is
Answer» EXPLANATION: I don't know this ANSWER PLEASE Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click please Brainliests click

13.

a particle is thrown with initial speed u at angle '∅', with the horizontal, under gravity. the relation between maximum height 'h' and range upon level ground 'R' is

Answer»

EXPLANATION:

I don't know this ANSWER

PLEASE Brainliests click

please Brainliests click

Discussion

14.	A rod of length 2.4 m and radius 4.6 a negative charge of 4.2 x 10-7 C spread uniformly over it surface. The electric field near the mid pointof the rod, at a point on its surface is (a) -8.6 x 105NC-1 (b) 8.6 x 104 (c) - 6.7 x 105NC-1 (d) 6.7 x 104
Answer» $\huge \blue{ \underline \purple{ \underline \mathtt \red{Question}}} \orange \downarrow$ A rod of length 2.4m and radius 4.6mm carries a NEGATIVE charge of 4.2 × $\tt\green{10}^\green{−7}$ C spread uniformly over it SURFACE. The ELECTRIC field near the mid-point of the rod, at a point on its surface is: (a) $\tt\orange{- 8.6 \: \times \: {10}^{5} {NC}^{ - 1}}$ (b) $\tt\orange{- 8.6 \: \times \: {10}^{4} {NC}^{ - 1}}$ (c) $\tt\orange{- 6.7 \: \times \: {10}^{5} {NC}^{ - 1}}$ (d) $\:\:$ $\tt\orange{ 6.7 \: \times \: {10}^{4} {NC}^{ - 1}}$ $\huge \blue{ \underline \purple{ \underline \mathtt \red{<klux>ANSWER</klux>}}} \orange \downarrow$ Correct option is Ⓒ $\tt\blue{ - 6.7 \: \times \: {10}^{5} {NC}^{ - 1} }$ Here, $\tt{l \: \longmapsto \: 2.4m \: , \: r \: = \: 4.6mm \: \longmapsto \: 4.6 \: \times \: {10}^{ - 3}m}$ $\tt{q \: \longmapsto \: 4.6 \: \times \: {10}^{ - 7} C}$ Linear charge density, $\tt{λ \: \longmapsto \: \frac{q}{1} \: \longmapsto \: \frac{ - 4.2 \: \times \: {10}^{ - 7} }{2.4}}$ $\tt{ \: \longmapsto \: - 1.75 \: \times \: {10}^{ - 7} {Cm}^{ - 1}}$ Electric field, $E \: \longmapsto \: \frac{λ}{2 \pi \: e_0r} \:$ $\tt={ \frac{ - 1.75 \: \times \: {10}^{ - 7} }{2 \: \times \: 3.14 \: \times \: {10}^{ - 12 \: \times \: 4.6 \: \times \: {10}^{ - 3} } } \: \leadsto \: - 6.67 \: \times \: {10}^{5} {NC}^{ - 1} }$ I hope it's HELPS you ☺️. Please markerd as brainliest answer ✌️✌️.

14.

A rod of length 2.4 m and radius 4.6 a negative charge of 4.2 x 10-7 C spread uniformly over it surface. The electric field near the mid pointof the rod, at a point on its surface is (a) -8.6 x 105NC-1 (b) 8.6 x 104 (c) - 6.7 x 105NC-1 (d) 6.7 x 104

Answer»

$\huge \blue{ \underline \purple{ \underline \mathtt \red{Question}}} \orange \downarrow$

A rod of length 2.4m and radius 4.6mm carries a NEGATIVE charge of 4.2 × $\tt\green{10}^\green{−7}$ C spread uniformly over it SURFACE. The ELECTRIC field near the mid-point of the rod, at a point on its surface is:

(a) $\tt\orange{- 8.6 \: \times \: {10}^{5} {NC}^{ - 1}}$

(b) $\tt\orange{- 8.6 \: \times \: {10}^{4} {NC}^{ - 1}}$

(c) $\tt\orange{- 6.7 \: \times \: {10}^{5} {NC}^{ - 1}}$

(d) $\:\:$ $\tt\orange{ 6.7 \: \times \: {10}^{4} {NC}^{ - 1}}$

$\huge \blue{ \underline \purple{ \underline \mathtt \red{<klux>ANSWER</klux>}}} \orange \downarrow$

Correct option is Ⓒ $\tt\blue{ - 6.7 \: \times \: {10}^{5} {NC}^{ - 1} }$

Here,

$\tt{l \: \longmapsto \: 2.4m \: , \: r \: = \: 4.6mm \: \longmapsto \: 4.6 \: \times \: {10}^{ - 3}m}$

$\tt{q \: \longmapsto \: 4.6 \: \times \: {10}^{ - 7} C}$

Linear charge density,

$\tt{λ \: \longmapsto \: \frac{q}{1} \: \longmapsto \: \frac{ - 4.2 \: \times \: {10}^{ - 7} }{2.4}}$

$\tt{ \: \longmapsto \: - 1.75 \: \times \: {10}^{ - 7} {Cm}^{ - 1}}$

Electric field,

$E \: \longmapsto \: \frac{λ}{2 \pi \: e_0r} \:$

$\tt={ \frac{ - 1.75 \: \times \: {10}^{ - 7} }{2 \: \times \: 3.14 \: \times \: {10}^{ - 12 \: \times \: 4.6 \: \times \: {10}^{ - 3} } } \: \leadsto \: - 6.67 \: \times \: {10}^{5} {NC}^{ - 1} }$

I hope it's HELPS you ☺️.

Please markerd as brainliest answer ✌️✌️.

Discussion

15.	Hello di mujhe lagaa aap on nahi hobtw kesi ho aapwhat is call?
Answer» I'm ALSO FINE but DI KYU bol ri h ? age pata h meri ?

Discussion

16.	at the time of sunrise and sunset (a) blue colour scattered and red colour reach your eyes (b) red colour scattered and blue colour reach your eyes (c) green and blue colour scattered and Orange reach your eyes (d) none of these
Answer» EXPLANATION: (c) is the answer dear HOPE it HELPS you

16.

at the time of sunrise and sunset (a) blue colour scattered and red colour reach your eyes (b) red colour scattered and blue colour reach your eyes (c) green and blue colour scattered and Orange reach your eyes (d) none of these

Answer»

EXPLANATION:

(c) is the answer dear

HOPE it HELPS you

Discussion

17.	Oh !Now I got it how those points got increased from 23K to 80K !!!
Answer» Answer: BRO, I answered your QUESTION on PINTEREST! CHECK that out

17.

Oh !Now I got it how those points got increased from 23K to 80K !!!

Answer»

Answer:

BRO, I answered your QUESTION on PINTEREST!

CHECK that out

Discussion

18.	৮) ওজনের মাত্রীয় সংকেত কী ?
Answer» Answer: The foils USED to wrap food ITEMS are made of ALUMINIUM. Due to which PROPERTY of aluminium is it possible?XD

18.

৮) ওজনের মাত্রীয় সংকেত কী ?

Answer»

Answer:

The foils USED to wrap food ITEMS are made of ALUMINIUM. Due to which PROPERTY of aluminium is it possible?XD

Discussion

19.	10 numerical problem for pressure class 8 cbse
Answer» ANSWER: [ SOLUTION] solution: Force or thrust here =F= 4 N. Area A = 0.003 m^2. Pressure exerted = P = F/A = 4/0.003 Pa = 1333.33 Pa. solution: Force or thrust here =F=600 N. Area A = 0.012 m^2. Pressure exerted = P = F/A = 600/0.012 Pa = 5 x 10^4 Pa. solution: Force or thrust here =F=250 N. Pressure exerted = P = 25,000 Pa. Explanation: PLEASE MARK me as BRAINLIEST

19.

10 numerical problem for pressure class 8 cbse

Answer»

ANSWER:

[ SOLUTION]

solution: Force or thrust here =F= 4 N. Area A = 0.003 m^2. Pressure exerted = P = F/A = 4/0.003 Pa = 1333.33 Pa.

solution: Force or thrust here =F=600 N. Area A = 0.012 m^2. Pressure exerted = P = F/A = 600/0.012 Pa = 5 x 10^4 Pa.

solution: Force or thrust here =F=250 N. Pressure exerted = P = 25,000 Pa.

Explanation:

PLEASE MARK me as BRAINLIEST

Discussion

20.	Injuries to the bone are called_______ * PartialFractureScratchPain
Answer» Answer: (b) fracture Explanation: injuries to the BONE is called FRACTURES .

20.

Injuries to the bone are called_______ * PartialFractureScratchPain

Answer»

Answer:

(b) fracture

Explanation:

injuries to the BONE is called FRACTURES .

Discussion

21.	2. When a car at high speed turns to the right, the passengers get pushed to the left due to [1] (a) centripetal force (b) inertial force (c) unbalanced forces acting to the left all of the above
Answer» ANSWER: DF j j j j j j i i u h j h. j h j j j. j h h h B h. j h h h h h h j. i

21.

2. When a car at high speed turns to the right, the passengers get pushed to the left due to [1] (a) centripetal force (b) inertial force (c) unbalanced forces acting to the left all of the above

Answer»

ANSWER:

DF j j j j j j i i u h j h. j h j j j. j h h h B h. j h h h h h h j. i

Discussion

22.	E. How much energy is stored in 4m³ water collected in a reservoir at a height of 50m. (Given, 1m³ water = 1000 kg)the right answer is 1960000 joule
Answer» 1960000 joule Photosynthesis is the process by which PLANTS USE SUNLIGHT, water, and CARBON dioxide to create oxygen and energy in the FORM of sugar.

22.

E. How much energy is stored in 4m³ water collected in a reservoir at a height of 50m. (Given, 1m³ water = 1000 kg)the right answer is 1960000 joule

Answer»

1960000 joule

Photosynthesis is the process by which PLANTS USE SUNLIGHT, water, and CARBON dioxide to create oxygen and energy in the FORM of sugar.

Discussion

23.	When an object is placed at a distance of 50 cm from a concave spherical mirror, the magnification produced is -1/2, where should the object be placed to get a magnification of -1/5 ?
Answer» Answer: Explanation: It may seem very difficult to figure out but you just have to read all the hints given and it will start to make sense. The calculation part is the easiest part. To start, since you are given that the magnification is negative means the image is inverted so that would make it a real image instead of VIRTUAL. A real image would be on the same side of the mirror as the object. Also the magnitude of the magnification is the ratio of the respective image and object distances; hence the image distance must be HALF the distance of the object in order to get an image half the size. The image turns out to be a little more than the focal point away from front of concave mirror. Moving the object farther way would make the image smaller and come closer to the focal point. To get a magnification of -1/5, the image distance would be 1/5 the distance of the object (i.e. the object is five times farther away than the image). Since we knew the object distance in the first case to be 50cm, then we know that half of that is 25cm and the image distance. Plugging into LENS equation gives 16.67 CM for the focal length. It also turns out that the object distance equals the focal point times the reciprocal magnification plus 1, or times 6. So that would give an object distance of 100cm (and image distance 20cm).

23.

When an object is placed at a distance of 50 cm from a concave spherical mirror, the magnification produced is -1/2, where should the object be placed to get a magnification of -1/5 ?

Answer»

Answer:

Explanation:

It may seem very difficult to figure out but you just have to read all the hints given and it will start to make sense. The calculation part is the easiest part. To start, since you are given that the magnification is negative means the image is inverted so that would make it a real image instead of VIRTUAL. A real image would be on the same side of the mirror as the object. Also the magnitude of the magnification is the ratio of the respective image and object distances; hence the image distance must be HALF the distance of the object in order to get an image half the size. The image turns out to be a little more than the focal point away from front of concave mirror. Moving the object farther way would make the image smaller and come closer to the focal point. To get a magnification of -1/5, the image distance would be 1/5 the distance of the object (i.e. the object is five times farther away than the image).

Since we knew the object distance in the first case to be 50cm, then we know that half of that is 25cm and the image distance. Plugging into LENS equation gives 16.67 CM for the focal length. It also turns out that the object distance equals the focal point times the reciprocal magnification plus 1, or times 6. So that would give an object distance of 100cm (and image distance 20cm).

Discussion

24.	What is meant by Snell's law ?
Answer» ANSWER: I HOPE my answer is CORRECT

24.

What is meant by Snell's law ?

Answer»

ANSWER:

I HOPE my answer is CORRECT

Discussion

25.	the room having a cube shape is given in figure the length of each side is a meter ,one fly goes point Ato point E then displacement done by a fly is
Answer» EXPLANATION: SORRY DEAR I don't KNOW the ANSWER

25.

the room having a cube shape is given in figure the length of each side is a meter ,one fly goes point Ato point E then displacement done by a fly is

Answer»

EXPLANATION:

SORRY DEAR I don't KNOW the ANSWER

Discussion

26.	Hihi By The way How are you. Have you Met an accident. Your friend was saying That Alex is in Hospital
Answer» ANSWER: i m FINE EXPLANATION: fine my LOVE

26.

Hihi By The way How are you. Have you Met an accident. Your friend was saying That Alex is in Hospital

Answer»

ANSWER:

i m FINE

EXPLANATION:

fine my LOVE

Discussion

27.	৩) 1 dyn বল 1mg ভরের বস্তুর ওপর কাজ করলে কী পরিমাণ তুরণ সৃষ্টি হবে ?
Answer» NIKAL bahahahhHHGHqjavauahahHshbbs

27.

৩) 1 dyn বল 1mg ভরের বস্তুর ওপর কাজ করলে কী পরিমাণ তুরণ সৃষ্টি হবে ?

Answer»

NIKAL

bahahahhHHGHqjavauahahHshbbs

Discussion

28.	Which of the following ray diagrams is/are correct?
Answer» ANSWER: OPTION B is the CORRECT answer

28.

Which of the following ray diagrams is/are correct?

Answer»

ANSWER:

OPTION B is the CORRECT answer

Discussion

29.	An object is placed at some distance from a convex lens. If the image formed by the lens is three times the linear size of the object, find its distance from the lens. The focal length of the lens is 10cm.
Answer» ANSWER: PLZ MARK me BRRAINLIST plz plz mark me BRRAINLIST plz plz

29.

An object is placed at some distance from a convex lens. If the image formed by the lens is three times the linear size of the object, find its distance from the lens. The focal length of the lens is 10cm.

Answer»

ANSWER:

PLZ MARK me BRRAINLIST plz plz mark me BRRAINLIST plz plz

Discussion

30.	Use of the shunt? Don't spam.
Answer»

Discussion

31.	What is shunt? Don't spam.
Answer» ANSWER: it is a LOW resistance CONNECTED in // with the galvanometer or AMMETER from the strong CURRENT.

31.

What is shunt? Don't spam.

Answer»

ANSWER:

it is a LOW resistance CONNECTED in // with the galvanometer or AMMETER from the strong CURRENT.

Discussion

32.	What is centripetal acceleration? derive expression for it ?
Answer» ANSWER: PHOTOSYNTHESIS is a PROCESS in which plants MAKE their own food with HELP of sunlight and carbon dioxide

32.

What is centripetal acceleration? derive expression for it ?

Answer»

ANSWER:

PHOTOSYNTHESIS is a PROCESS in which plants MAKE their own food with HELP of sunlight and carbon dioxide

Discussion

33.	Why earth is a blue plannet??? ?,,xDFollow for more I will give you a follów back :)Don't spam
Answer» Answer: Planet EARTH has been called the "Blue Planet" DUE to the abundant water on its surface. Here on Earth, we TAKE liquid water for granted; after all, our bodies are MOSTLY made of water. ... Liquid water covers most of the surface of our planet. This water comes in MANY forms, each with it's own special properties Explanation: Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water. ... Liquid water covers most of the surface of our planet. This water comes in many forms, each with it's own special properties

33.

Why earth is a blue plannet??? ?,,xDFollow for more I will give you a follów back :)Don't spam

Answer»

Answer:

Planet EARTH has been called the "Blue Planet" DUE to the abundant water on its surface. Here on Earth, we TAKE liquid water for granted; after all, our bodies are MOSTLY made of water. ... Liquid water covers most of the surface of our planet. This water comes in MANY forms, each with it's own special properties

Explanation:

Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water. ... Liquid water covers most of the surface of our planet. This water comes in many forms, each with it's own special properties

Discussion

34.	The volume of an object is 4 cubic centimeter and mass of an object is 104 gram. What is the density of the object?
Answer» Answer: GIVEN density =1×10 3 kgm −3 =1 gm −3 MOLAR mass of water =18 gm/mole No. of moles in 1 gm =1/18=0.55 moles 18 gm contain MOLECULES of H 2 O = 6.022×10 23 1 gm contain molecules of H 2 O = 18 6.022×10 23 =0.33×10 23 Volume occupied by 1 molecule of water is = 0.33×10 23 1 =2.99×10 −23

34.

The volume of an object is 4 cubic centimeter and mass of an object is 104 gram. What is the density of the object?

Answer»

Answer:

GIVEN density =1×10

3

kgm

−3

=1 gm

−3

MOLAR mass of water =18 gm/mole

No. of moles in 1 gm =1/18=0.55 moles

18 gm contain MOLECULES of H

2

O = 6.022×10

23

1 gm contain molecules of H

2

O =

18

6.022×10

23

=0.33×10

23

Volume occupied by 1 molecule of water is =

0.33×10

23

1

=2.99×10

−23

Discussion

35.	I'll going to work dear so...byee
Answer» Answer: OK BYE HOPE your day is GOOD

35.

I'll going to work dear so...byee

Answer»

Answer:

OK BYE HOPE your day is GOOD

Discussion

36.	D. Calculate the energy stored in a body of mass 40 kg when it is at a height of 30m.The right answer is 11760
Answer» ANSWER: fkgdjdgdhkhxnfjfhffhcbcckckbchcbchkggm

36.

D. Calculate the energy stored in a body of mass 40 kg when it is at a height of 30m.The right answer is 11760

Answer»

ANSWER:

fkgdjdgdhkhxnfjfhffhcbcckckbchcbchkggm

Discussion

37.	Why earth is a blue plannet??? ?,,xDFollow for more I will give you a follów back :)Spam = 25answers And all questions deleted !
Answer» Answer: Planet Earth has been called the "Blue Planet" due to the abundant water on its SURFACE. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water. ... Liquid water covers most of the surface of our planet. This water COMES in MANY FORMS, each with it's own special properties Explanation: OKAY

37.

Why earth is a blue plannet??? ?,,xDFollow for more I will give you a follów back :)Spam = 25answers And all questions deleted !

Answer»

Answer:

Planet Earth has been called the "Blue Planet" due to the abundant water on its SURFACE. Here on Earth, we take liquid water for granted; after all, our bodies are mostly made of water. ... Liquid water covers most of the surface of our planet. This water COMES in MANY FORMS, each with it's own special properties

Explanation:

OKAY

Discussion

38.	विद्युत प्रवाह म्हणजे_____ चे वहन होय
Answer» Answer: PLZ Mark me BRRAINLIST I NEED one BRRAINLIST answer to BECOME RANK up

38.

विद्युत प्रवाह म्हणजे_____ चे वहन होय

Answer»

Answer:

PLZ Mark me BRRAINLIST I NEED one BRRAINLIST answer to BECOME RANK up

Discussion

39.	Define electroplating. Write the applications of electroplating.
Answer» EXPLANATION: DEFINE ELECTROPLATING. WRITE the APPLICATIONS of electroplating

39.

Define electroplating. Write the applications of electroplating.

Answer»

EXPLANATION:

DEFINE ELECTROPLATING. WRITE the APPLICATIONS of electroplating

Discussion

40.	Take a glass bottle with tight lid. Fill it with water completely without any gaps and fix the lid tightly and keep it in a refrigerator for few hours and take out. What you have confirmed ? 1) Glass bottle contracts and breaks due to low temperature. 2) Glass bottle expands and breaks due to lowering of temperature. 3) Glass bottle breaks due to increase in volume when water gets converted into ice. 4) Glass bottle breaks due to decrease in volume when water gets converted into ice.
Answer» It is due to ANOMALOUS expansion or strange behavior of water. The expansion of water TAKES place as it is cooled from 4 degrees CELSIUS to zero DEGREE Celsius. This behavior is unusual because most substances contract when they are cooled. But water expand on solidifying. Due to this expansion a glass bottle COMPLETELY filled with water and tightly closed at room temperature is likely to burst when it is kept in fridge. $.$

40.

Take a glass bottle with tight lid. Fill it with water completely without any gaps and fix the lid tightly and keep it in a refrigerator for few hours and take out. What you have confirmed ? 1) Glass bottle contracts and breaks due to low temperature. 2) Glass bottle expands and breaks due to lowering of temperature. 3) Glass bottle breaks due to increase in volume when water gets converted into ice. 4) Glass bottle breaks due to decrease in volume when water gets converted into ice.

Answer»

It is due to ANOMALOUS expansion or strange behavior of water.

The expansion of water TAKES place as it is cooled from 4 degrees CELSIUS to zero DEGREE Celsius. This behavior is unusual because most substances contract when they are cooled. But water expand on solidifying. Due to this expansion a glass bottle COMPLETELY filled with water and tightly closed at room temperature is likely to burst when it is kept in fridge.

$.$

Discussion

41.	The solution which conducts electricity is known as?
Answer» Answer: ELECTROLYTE Solutions An electrolyte is any salt or ionizable molecule that, when dissolved in SOLUTION, will GIVE that solution the ability to conduct electricity. This is because when a salt dissolves, its dissociated ions can MOVE freely in solution, allowing a charge to FLOW.

41.

The solution which conducts electricity is known as?

Answer»

Answer:

ELECTROLYTE Solutions

An electrolyte is any salt or ionizable molecule that, when dissolved in SOLUTION, will GIVE that solution the ability to conduct electricity. This is because when a salt dissolves, its dissociated ions can MOVE freely in solution, allowing a charge to FLOW.

Discussion

42.	Take a glass bottle with tight lid. Fill it with water completely without any gaps and fix the lid tightly and keep it in a refrigerator for few hours and take out. What you have confirmed? 1) Glass bottle contracts and breaks due to low temperature, 2) Glass bottle expands and breaks due to lowering of temperature. 3) Glass bottle breaks due to increase. 4)Glass bottle breaks due to decrease in volume when water gets converted into ice
Answer» matter SOLID liquid GAS give me BRAINLIEST so I be FOLLOWER of u

Discussion

43.	Principle of moving coil galvanometer?
Answer» Answer: A MOVING coil galvanometer works on the principle that a current-carrying coil placed in a magnetic field, EXPERIENCES a torque. The coil springs along with the RADIAL field ensure the DEFLECTION to be proportional to the strength of the current

43.

Principle of moving coil galvanometer?

Answer»

Answer:

A MOVING coil galvanometer works on the principle that a current-carrying coil placed in a magnetic field, EXPERIENCES a torque. The coil springs along with the RADIAL field ensure the DEFLECTION to be proportional to the strength of the current

Discussion

44.	A ball thrown in vertically upward direction attains maximum height of 20 meter. At what height would its velocity be half of its initial velocity ?
Answer» ANSWER: Step by step SOLUTION by Solution For MOTION of a ball in vertically upward DIRECTION, suppose v0= initial velocity = ?. v = velocity at maximum height (20m)=0. a=−gandd=20m From equation 2d=v2−v20, we get, −2g×20=(0)2−v20 ∴−40g=−v20 ∴v20=40g ...(1) Now, suppose velocity at height h=v=v02 ∴ From equation 2ad=v2−v220, we get, −2gh=v204=(∵a=−g,d=h,v=v02) ∴−2gh=−3v204 ∴−h=3v204×2g ∴h=3×40g8g (From eq. (i)) ∴h=15m

44.

A ball thrown in vertically upward direction attains maximum height of 20 meter. At what height would its velocity be half of its initial velocity ?

Answer»

ANSWER:

Step by step SOLUTION by

Solution

For MOTION of a ball in vertically upward DIRECTION, suppose v0= initial velocity = ?.

v = velocity at maximum height (20m)=0.

a=−gandd=20m

From equation 2d=v2−v20, we get,

−2g×20=(0)2−v20

∴−40g=−v20

∴v20=40g ...(1)

Now, suppose velocity at height h=v=v02

∴ From equation 2ad=v2−v220, we get,

−2gh=v204=(∵a=−g,d=h,v=v02)

∴−2gh=−3v204

∴−h=3v204×2g

∴h=3×40g8g (From eq. (i))

∴h=15m

Discussion

45.	Itne late fresh hote ho tumme subha hi ho gya breakfast
Answer» A particle's mass therefore, determines the maximum distance at which it can interact with other particles and on any force it mediates. By the same TOKEN, the reverse is ALSO true: MASSLESS and near-massless particles can CARRY LONG distance forces.

Discussion

46.	In electro-refining of copper, pure copper is collected in which electrode?
Answer» Answer: Copper is PURIFIED by electrolysis . Electricity is passed through solutions CONTAINING copper compounds, such as copper(II) SULFATE. The anode (POSITIVE electrode ) is MADE from impure copper and the cathode (negative electrode) is made from pure copper. Explanation: please follow. me please

46.

In electro-refining of copper, pure copper is collected in which electrode?

Answer»

Answer:

Copper is PURIFIED by electrolysis . Electricity is passed through solutions CONTAINING copper compounds, such as copper(II) SULFATE. The anode (POSITIVE electrode ) is MADE from impure copper and the cathode (negative electrode) is made from pure copper.

Explanation:

please follow. me

please

Discussion

47.	How are distance, time and speed related to one another?
Answer» Answer: plz guys subscribe to my CHANNEL name was REHAN ANIME EDITS plz subscribe my channel those subscribe my channel I mark as BRAINLIEST and give them 500

47.

How are distance, time and speed related to one another?

Answer»

Answer:

plz guys subscribe to my CHANNEL name was REHAN ANIME EDITS plz subscribe my channel

those subscribe my channel I mark as BRAINLIEST and give them 500

Discussion

48.	3. Which system of units have you used?
Answer» Which system of units have you USED? Answer: The current international standard for the metric system is the International System of Units (System international d'unités or SI). It is a system in which all units can be expressed in terms of SEVEN units. The units that serves as the SI base units are the METRE, kilogram, second, AMPERE, kelvin, mole, and candela.

48.

3. Which system of units have you used?

Answer»

Which system of units have you USED?

Answer:

The current international standard for the metric system is the International System of Units (System international d'unités or SI). It is a system in which all units can be expressed in terms of SEVEN units. The units that serves as the SI base units are the METRE, kilogram, second, AMPERE, kelvin, mole, and candela.

Discussion

49.	Good morning aryan have a great day breakfast ho gya tumhara
Answer» Answer: hii good morning shweta YAAR abhi to fresh होके aaya hu abhi BREAKFAST nahi thore time baad OKK and TUMHARA

49.

Good morning aryan have a great day breakfast ho gya tumhara

Answer»

Answer:

hii good morning shweta YAAR abhi to fresh होके aaya hu abhi BREAKFAST nahi thore time baad OKK and TUMHARA

Discussion

50.	May God bless you and fulfill your every dreamKeep smiling always✨✨Enjoy your day oppa
Answer» HAPPY BIRTHDAY DYLAN OPPA...☆☆☆☆☆☆☆☆

50.

May God bless you and fulfill your every dreamKeep smiling always✨✨Enjoy your day oppa

Answer»

HAPPY BIRTHDAY DYLAN OPPA...☆☆☆☆☆☆☆☆

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

PLEASE HELP PHYSICS CHAPTER ENERGY​

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Here :

NOTE:

________________

Note:

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Which of the following ray diagrams is/are correct?

An object is placed at some distance from a convex lens. If the image formed by the lens is three times the linear size of the object, find its distance from the lens. The focal length of the lens is 10cm.

Use of the shunt? Don't spam.

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विद्युत प्रवाह म्हणजे_____ चे वहन होय​

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PLEASE HELP PHYSICS CHAPTER ENERGY

A 2.5 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 15cm. The distance of the object from the lens is 30cm .Find the position and the size of the image.

Which of the following points about specific resostance is false

DERIVE THE EQUATION OF KINETIC ENERGY BY USING CALCULUSCORRECT SOLUTION WILL BE MARKED AS BRAINLIEST ANSWER

Jisko free ke point ?s mskskdkdjdjdjjdjdjsjjejwGood morning .Hi how r comme on meeetoturpwutxb

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Solved Examples 0.4. Using the ideal gas equation, determine the value of R. Given that one gram molecule of a gas at S.T.P. occupies 22.4 litre. Solutions

I think my all friends is busy ya offline okk

a particle is thrown with initial speed u at angle '∅', with the horizontal, under gravity. the relation between maximum height 'h' and range upon level ground 'R' is

A rod of length 2.4 m and radius 4.6 a negative charge of 4.2 x 10-7 C spread uniformly over it surface. The electric field near the mid pointof the rod, at a point on its surface is (a) -8.6 x 105NC-1 (b) 8.6 x 104 (c) - 6.7 x 105NC-1 (d) 6.7 x 104

Hello di mujhe lagaa aap on nahi hobtw kesi ho aapwhat is call?

at the time of sunrise and sunset (a) blue colour scattered and red colour reach your eyes (b) red colour scattered and blue colour reach your eyes (c) green and blue colour scattered and Orange reach your eyes (d) none of these

Oh !Now I got it how those points got increased from 23K to 80K !!!

৮) ওজনের মাত্রীয় সংকেত কী ?

10 numerical problem for pressure class 8 cbse

Injuries to the bone are called_______ * PartialFractureScratchPain

2. When a car at high speed turns to the right, the passengers get pushed to the left due to [1] (a) centripetal force (b) inertial force (c) unbalanced forces acting to the left all of the above

E. How much energy is stored in 4m³ water collected in a reservoir at a height of 50m. (Given, 1m³ water = 1000 kg)the right answer is 1960000 joule

the room having a cube shape is given in figure the length of each side is a meter ,one fly goes point Ato point E then displacement done by a fly is

Hihi By The way How are you. Have you Met an accident. Your friend was saying That Alex is in Hospital

৩) 1 dyn বল 1mg ভরের বস্তুর ওপর কাজ করলে কী পরিমাণ তুরণ সৃষ্টি হবে ?

Why earth is a blue plannet??? ?,,xDFollow for more I will give you a follów back :)Don't spam

The volume of an object is 4 cubic centimeter and mass of an object is 104 gram. What is the density of the object?

I'll going to work dear so...byee

D. Calculate the energy stored in a body of mass 40 kg when it is at a height of 30m.The right answer is 11760

Why earth is a blue plannet??? ?,,xDFollow for more I will give you a follów back :)Spam = 25answers And all questions deleted !

विद्युत प्रवाह म्हणजे_____ चे वहन होय

Define electroplating. Write the applications of electroplating.

The solution which conducts electricity is known as?

A ball thrown in vertically upward direction attains maximum height of 20 meter. At what height would its velocity be half of its initial velocity ?

Itne late fresh hote ho tumme subha hi ho gya breakfast

In electro-refining of copper, pure copper is collected in which electrode?

How are distance, time and speed related to one another?

3. Which system of units have you used?

Good morning aryan have a great day breakfast ho gya tumhara

May God bless you and fulfill your every dreamKeep smiling always✨✨Enjoy your day oppa