67486 + Interview Questions in Secondary School in Physics

1.	The p.d. between two plates separated by adistance of 1 mm is 100 V. The force on anelectron placed in between the plates is1) 10 N2) 1.6x10-24 N3) 1.6x10-14 N4) 1.6x10-19 N
Answer» ANSWER: OPTION 3 ....1.6 ×10^-14 eqn is :QE..E=v/r.

1.

The p.d. between two plates separated by adistance of 1 mm is 100 V. The force on anelectron placed in between the plates is1) 10 N2) 1.6x10-24 N3) 1.6x10-14 N4) 1.6x10-19 N

Answer»

ANSWER:

OPTION 3 ....1.6 ×10^-14

eqn is :QE..E=v/r.

Discussion

2.	Find the c value and give a step by step explanation
Answer» $\blue{\bold{\underline{\underline{Answer:}}}}$ $\green{\tt{\therefore{Value\:of\:c=6}}}$ $\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$ $\green{\underline \bold{<klux>GIVEN</klux> :}} \\ \tt: \implies Force(F) = (3 \hat{i} - 2 \hat{j} + \hat{k}) \: N \\ \\ \tt: \implies Displacement(s) = (2 \hat{i} - 2 \hat{j} + c \hat{k} ) \: m\\ \\ \tt: \implies Work \: Done = 16 \: J \\ \\ \red{\underline \bold{To \: find :}} \\ \tt: \implies Value \: of \: c =?$ • ACCORDING to given QUESTION : $\bold{As \: we \: know \: that} \\ \tt: \implies Work \: Done = Force \times Displacement \\ \\ \tt: \implies 16 = (3 \hat{i} - 2 \hat{j} + \hat{k}) \times (2 \hat{i} - 2 \hat{j} + c \hat{k} ) \\ \\ \tt: \implies 16 = (3 \hat{i} \times 2 \hat{i}) + ( - 2 \hat{j} \times - 2 \hat{j}) + ( \hat{k} \times c \hat{k}) \\ \\ \tt \circ \: \: \: \hat{i} \times \hat{i} = 1 \\ \\ \tt \circ \: \: \: \hat{j} \times \hat{j} = 1 \\ \\ \tt \circ \: \: \: \hat{k} \times \hat{k} = 1 \\ \\ \tt: \implies 16 = 6 + 4 + c \\ \\ \tt: \implies 16 = 10 + c \\ \\ \tt: \implies c = 16 - 10 \\ \\ \green{\tt: \implies c = 6} \\ \\ \green{\tt \therefore Value \: of \: c \: is \: 6}$

2.

Find the c value and give a step by step explanation

Answer»

$\blue{\bold{\underline{\underline{Answer:}}}}$

$\green{\tt{\therefore{Value\:of\:c=6}}}$

$\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

$\green{\underline \bold{<klux>GIVEN</klux> :}} \\ \tt: \implies Force(F) = (3 \hat{i} - 2 \hat{j} + \hat{k}) \: N \\ \\ \tt: \implies Displacement(s) = (2 \hat{i} - 2 \hat{j} + c \hat{k} ) \: m\\ \\ \tt: \implies Work \: Done = 16 \: J \\ \\ \red{\underline \bold{To \: find :}} \\ \tt: \implies Value \: of \: c =?$

• ACCORDING to given QUESTION :

$\bold{As \: we \: know \: that} \\ \tt: \implies Work \: Done = Force \times Displacement \\ \\ \tt: \implies 16 = (3 \hat{i} - 2 \hat{j} + \hat{k}) \times (2 \hat{i} - 2 \hat{j} + c \hat{k} ) \\ \\ \tt: \implies 16 = (3 \hat{i} \times 2 \hat{i}) + ( - 2 \hat{j} \times - 2 \hat{j}) + ( \hat{k} \times c \hat{k}) \\ \\ \tt \circ \: \: \: \hat{i} \times \hat{i} = 1 \\ \\ \tt \circ \: \: \: \hat{j} \times \hat{j} = 1 \\ \\ \tt \circ \: \: \: \hat{k} \times \hat{k} = 1 \\ \\ \tt: \implies 16 = 6 + 4 + c \\ \\ \tt: \implies 16 = 10 + c \\ \\ \tt: \implies c = 16 - 10 \\ \\ \green{\tt: \implies c = 6} \\ \\ \green{\tt \therefore Value \: of \: c \: is \: 6}$

Discussion

3.	Calculate the significant figures. 0.4501
Answer» ANSWER: just count the number of terms after 0. = 4

3.

Calculate the significant figures. 0.4501

Answer»

ANSWER:

just count the number of terms after 0. = 4

Discussion

4.	Name the devices used to measure the potential difference
Answer» ANSWER: HELLO BROTHER EXPLANATION: A VOLTMETER is an instrumentthat measuresthe difference in electrical potentialbetween two points in an electric circuit.

4.

Name the devices used to measure the potential difference

Answer»

ANSWER:

HELLO BROTHER

EXPLANATION:

A VOLTMETER is an instrumentthat measuresthe difference in electrical potentialbetween two points in an electric circuit.

Discussion

5.	Find the horizontal force required to drag a body of weight 100N along a horizontal plane.if the plane were gradually raised up to 15°,the body will begin to slide.
Answer» Answer: Heya mate your answer is---------------------------------------------------- 100N itself as NEWTON third law says action and REACTION FORCES are same plz MARK brainliest ♥️ follow me ✨❤️✨❤️✨❤️

5.

Find the horizontal force required to drag a body of weight 100N along a horizontal plane.if the plane were gradually raised up to 15°,the body will begin to slide.

Answer»

Answer:

Heya mate your answer is----------------------------------------------------

100N itself as NEWTON third law says action and REACTION FORCES are same

plz MARK brainliest ♥️

follow me ✨❤️✨❤️✨❤️

Discussion

6.	Dimensions of velocity are x in mass and y in time, then x and y are
Answer» ANSWER: y= -1 and x=0..no relation btw v and mass

6.

Dimensions of velocity are x in mass and y in time, then x and y are

Answer»

ANSWER:

y= -1 and x=0..no relation btw v and mass

Discussion

7.	State second law of newton. also derive the expression for second law of motion
Answer» ANSWER: HOPE it HELPS you............

7.

State second law of newton. also derive the expression for second law of motion

Answer»

ANSWER:

HOPE it HELPS you............

Discussion

8.	Water vapor in the air is present in which form?
Answer» ANSWER: HOPE it HELPS you............

8.

Water vapor in the air is present in which form?

Answer»

ANSWER:

HOPE it HELPS you............

Discussion

9.	Mention expression for drift velocity in terms of current
Answer» ANSWER: HOPE it HELPS you............

9.

Mention expression for drift velocity in terms of current

Answer»

ANSWER:

HOPE it HELPS you............

Discussion

10.	Plz give me Answer take your time
Answer» EXPLANATION: this is all you ASKED just PURE CHEMISTRY

10.

Plz give me Answer take your time

Answer»

EXPLANATION:

this is all you ASKED just PURE CHEMISTRY

Discussion

11.	at what distance in the front of the concave mirror should an object be placed to get it's virtual and errect image?
Answer» Answer: Spectral Ranges from 250 nm to 20 µm - FOCAL Lengths from 9.5 MM to 500 mm. VIEW Services. Create An Account. View All Products. Types: DIELECTRIC, Dichroic, Ultrafast, BLANKS, Hot / Cold

11.

at what distance in the front of the concave mirror should an object be placed to get it's virtual and errect image?

Answer»

Answer:

Spectral Ranges from 250 nm to 20 µm - FOCAL Lengths from 9.5 MM to 500 mm. VIEW Services. Create An Account. View All Products. Types: DIELECTRIC, Dichroic, Ultrafast, BLANKS, Hot / Cold

Discussion

12.	Which is the non metal from the following ( ) A)zinc B)Corbon C) Aluminium D)Magnesium 2. which is a metal from the following ( ) A) Iodine B) Sulphur C)Gold D)phosphorous 3. which is a highly malleable ( ) A) Aluminium B) Silver C) Gold D)All the above 4. Early human beings made their tools with ( ) A) Stone B) Wood C) Iron D) A and B 5. Which is liquid state metal ( ) A) Bromine B) Mercury C) Iron D) Iodine
Answer» Answer: 1 zinc 2 gold 3 aluminium 4 STONE 5 mercury I hope it is helpful pls MARK me as BRAINLIST

12.

Which is the non metal from the following ( ) A)zinc B)Corbon C) Aluminium D)Magnesium 2. which is a metal from the following ( ) A) Iodine B) Sulphur C)Gold D)phosphorous 3. which is a highly malleable ( ) A) Aluminium B) Silver C) Gold D)All the above 4. Early human beings made their tools with ( ) A) Stone B) Wood C) Iron D) A and B 5. Which is liquid state metal ( ) A) Bromine B) Mercury C) Iron D) Iodine

Answer»

Answer:

1 zinc

2 gold

3 aluminium

4 STONE

5 mercury

I hope it is helpful

pls MARK me as BRAINLIST

Discussion

13.	a person holds a bundle of hay over his head for 30 minutes and get tired has he done some work or not justify your answer
Answer» $\huge \underline \bold \red {AnsWer}$ When a person HOLDS a bundle of hay over his head, then there is no displacement in the bundle of hay. Although, force of GRAVITY is acting on the bundle, the person is not applying any force on it. HENCE, in the ABSENCE of force, WORK done by the person on the bundle is zero. Mark as Brainliest Plz

13.

a person holds a bundle of hay over his head for 30 minutes and get tired has he done some work or not justify your answer

Answer»

$\huge \underline \bold \red {AnsWer}$

When a person HOLDS a bundle of hay over his head, then there is no displacement in the bundle of hay. Although, force of GRAVITY is acting on the bundle, the person is not applying any force on it. HENCE, in the ABSENCE of force, WORK done by the person on the bundle is zero.

Mark as Brainliest Plz

Discussion

14.	Why are the weight in s box kept in a 5:2:2:1
Answer» Answer: 5 :2::2:1 5×1=2×2 5=4 5/4

14.

Why are the weight in s box kept in a 5:2:2:1

Answer»

Answer:

5 :2::2:1

5×1=2×2

5=4

5/4

Discussion

15.	लेंथ एंड ब्रेथ ऑफ़ ए फील्ड 22 पॉइंट 4 सेंटीमीटर एंड 15.8 सेंटीमीटर फैक्ट्री एंड हैव टू एनएफसी ऑफ जीरो पॉइंट 2 सेंटीमीटर फाइंड द परसेंटेज ऑफ डिफीट
Answer» Answer: Type the QUESTION PROPERLY EXPLANATION: HOPE you like it.......................

15.

लेंथ एंड ब्रेथ ऑफ़ ए फील्ड 22 पॉइंट 4 सेंटीमीटर एंड 15.8 सेंटीमीटर फैक्ट्री एंड हैव टू एनएफसी ऑफ जीरो पॉइंट 2 सेंटीमीटर फाइंड द परसेंटेज ऑफ डिफीट

Answer»

Answer:

Type the QUESTION PROPERLY

EXPLANATION:

HOPE you like it.......................

Discussion

16.	a spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in fig . what is the electric field inside the emptied sphere
Answer» Answer: A spherical portion has been REMOVED from a solid sphere having a charge distributed uniformly in its volume as SHOWN in the figure. The ELECTRIC field inisde the emptied space is. SOLUTION : ... the electric field DUE to charge on big. Explanation: hope it helps follow me

16.

a spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in fig . what is the electric field inside the emptied sphere

Answer»

Answer:

A spherical portion has been REMOVED from a solid sphere having a charge distributed uniformly in its volume as SHOWN in the figure. The ELECTRIC field inisde the emptied space is. SOLUTION : ... the electric field DUE to charge on big.

Explanation:

hope it helps

follow me

Discussion

17.	Kindly answer fast.
Answer» ANSWER: OPTION B Explanation:

17.

Kindly answer fast.

Answer»

ANSWER:

OPTION B

Explanation:

Discussion

18.	Force on a particle depends on (a)Mass m of the particle (b) Acceleration a of a particle. Find the expression of force
Answer» ANSWER: I hope this pic GIVEN below is CLEAR.. EXPLANATION: hope it help u

18.

Force on a particle depends on (a)Mass m of the particle (b) Acceleration a of a particle. Find the expression of force

Answer»

ANSWER:

I hope this pic GIVEN below is CLEAR..

EXPLANATION:

hope it help u

Discussion

19.	Give me Answer. righttt noww
Answer» ANSWER: () EXPLANATION:** I WILL NOT GIVE U A SINGLE ANSWER

19.

Give me Answer. righttt noww

Answer»

ANSWER:

(**)

EXPLANATION:

I WILL NOT GIVE U A SINGLE ANSWER

Discussion

20.	13. With the help ofvelocity -time graph ,derive the position-time relation for uniformlyaccelerated motion (3MARKS) 1
Answer» ANSWER: GRAPH pallarrel to X AXIS

20.

13. With the help ofvelocity -time graph ,derive the position-time relation for uniformlyaccelerated motion (3MARKS) 1

Answer»

ANSWER:

GRAPH pallarrel to X AXIS

Discussion

21.	When the refractive index of the object space and image space is same?
Answer» Answer: When there is vacuum. Explanation: Object-space methods are generally used in line-display ALGORITHMS. IMAGE-Space method:- Image space method is implemented in the screen coordinate system in which the objects are viewed. In an image-space algorithm, visibility is DECIDED point by point at each PIXEL POSITION on the view plane.

21.

When the refractive index of the object space and image space is same?

Answer»

Answer:

When there is vacuum.

Explanation:

Object-space methods are generally used in line-display ALGORITHMS. IMAGE-Space method:- Image space method is implemented in the screen coordinate system in which the objects are viewed. In an image-space algorithm, visibility is DECIDED point by point at each PIXEL POSITION on the view plane.

Discussion

22.	What is the Composerom of German Silver?- )(ca) Copper (Zn) zimeCN) Nickewhat is the Composition of gun metal(Cu) copper (w).zinehich alloy is used to make guess
Answer» EXPLANATION: German silver varies in composition, the percentage of the three elements ranging approximately as follows: COPPER, from 50% to 61.6%; ZINC, from 19% to 17.2%; nickel, from 30% to 21.1%.

22.

What is the Composerom of German Silver?- )(ca) Copper (Zn) zimeCN) Nickewhat is the Composition of gun metal(Cu) copper (w).zinehich alloy is used to make guess

Answer»

EXPLANATION:

German silver varies in composition, the percentage of the three elements ranging approximately as follows: COPPER, from 50% to 61.6%; ZINC, from 19% to 17.2%; nickel, from 30% to 21.1%.

Discussion

23.	The density of a gas at STP is 2g/l. Its molecular weight is
Answer» Answer: 44 Explanation: The CONDITION at STP are : .8 P=1 ATM, T=273.15K, R= 0.0821 L atm mol K. (P' - is row) Explanation: Using the EQUATION, P' = PM/RT M=P'RT/P M= 1.8×0.0821× 273.15/1 M= 40.36 is EQUAL to 44.8g The Molecular weight is 44.8g Hope it helps you

23.

The density of a gas at STP is 2g/l. Its molecular weight is

Answer»

Answer:

44

Explanation:

The CONDITION at STP are :

.8

P=1 ATM, T=273.15K, R= 0.0821 L atm mol K. (P' - is row)

Explanation:

Using the EQUATION,

P' = PM/RT

M=P'RT/P

M= 1.8×0.0821× 273.15/1

M= 40.36 is EQUAL to 44.8g

The Molecular weight is 44.8g

Hope it helps you

Discussion

24.	How many number of free surface can a solid have
Answer» Answer: Since solid consist of infinite number of ATOM and layers in particular arrangement therefore it CONTAIN infinite number of FREE surface. Liquid contain only one free surface because force of ATTRACTION is LESS between the atom which do not allow it have more than one free surface.

24.

How many number of free surface can a solid have

Answer»

Answer:

Since solid consist of infinite number of ATOM and layers in particular arrangement therefore it CONTAIN infinite number of FREE surface. Liquid contain only one free surface because force of ATTRACTION is LESS between the atom which do not allow it have more than one free surface.

Discussion

25.	Draw lewis structure of NH3 and H2O
Answer» Answer: HOPE it will HELP you make answer as BRAIN LIST answer

25.

Draw lewis structure of NH3 and H2O

Answer»

Answer:

HOPE it will HELP you

make answer as BRAIN LIST answer

Discussion

26.	Why SI unit of both work and force are not same
Answer» Answer: understand this if you push a I kg MASS and produce 1 more sec sq acceleration then it is 1 N FORCE...if you are ABLE to post it with same acceleration for 1 METER..it is 1 J work I HOPE you understood..both are different so different units

26.

Why SI unit of both work and force are not same

Answer»

Answer:

understand this if you push a I kg MASS and produce 1 more sec sq acceleration then it is 1 N FORCE...if you are ABLE to post it with same acceleration for 1 METER..it is 1 J work

I HOPE you understood..both are different so different units

Discussion

27.	A truck moving at 72kmph carries a steel girder which rests on its wooden floor. What is the minimum time in which the truck can come to stop without the girder moving forward? Coefficient of static friction between steel and wood is 0.5.
Answer» Given: A truck moving at 72kmph carries a STEEL girder which rests on its wooden floor. Coefficient of static friction between steel and wood is 0.5. To find: Minimum time in which the truck can COME to stop without the girder moving forward. Calculation: The girder will stay in TRANSLATIONAL equilibrium when the frictional force will be balanced by the the pseudo force when the truck is decelerating. Initial velocity = 72 km/hr = 20 m/s. Let mass of girder be m ; $\therefore \: F = friction$ $= > ma = - \mu \: N$ $= > ma = \mu (mg)$ $= > a = - \mu g$ $= > \dfrac{0 - u}{t} = - \mu g$ $= > \dfrac{0 - 20}{t} = - (0.5) \times (10)$ $= > \dfrac{20}{t} = - 5$ $= > t = 4 \: sec$ So, FINAL answer is: $\boxed{ \sf{ \red{ \large{time = 4 \: sec}}}}$

27.

A truck moving at 72kmph carries a steel girder which rests on its wooden floor. What is the minimum time in which the truck can come to stop without the girder moving forward? Coefficient of static friction between steel and wood is 0.5.

Answer»

Given:

A truck moving at 72kmph carries a STEEL girder which rests on its wooden floor. Coefficient of static friction between steel and wood is 0.5.

To find:

Minimum time in which the truck can COME to stop without the girder moving forward.

Calculation:

The girder will stay in TRANSLATIONAL equilibrium when the frictional force will be balanced by the the pseudo force when the truck is decelerating.

Initial velocity = 72 km/hr = 20 m/s.

Let mass of girder be m ;

$\therefore \: F = friction$

$= > ma = - \mu \: N$

$= > ma = \mu (mg)$

$= > a = - \mu g$

$= > \dfrac{0 - u}{t} = - \mu g$

$= > \dfrac{0 - 20}{t} = - (0.5) \times (10)$

$= > \dfrac{20}{t} = - 5$

$= > t = 4 \: sec$

So, FINAL answer is:

$\boxed{ \sf{ \red{ \large{time = 4 \: sec}}}}$

Discussion

28.	What happens when gypsum is heat at 373k?
Answer» ANSWER: When gypsum is heated at 373 K, it loses its water of CRYSTALLIZATION or all the water MOLECULES and BECOMES calcium sulphate hemihydrate. ... On being further heated beyond 373 K, gypsum gives a PRODUCT known as Gamma “Anhydrite”.

28.

What happens when gypsum is heat at 373k?

Answer»

ANSWER:

When gypsum is heated at 373 K, it loses its water of CRYSTALLIZATION or all the water MOLECULES and BECOMES calcium sulphate hemihydrate. ... On being further heated beyond 373 K, gypsum gives a PRODUCT known as Gamma “Anhydrite”.

Discussion

29.	1 point1. It is taken a woodenblock and an Iron block ofsame mass and they arecompletely immersed inwater. Which will beexperienced greaterbuoyancy? (ഒരേമാസുള്ളഒരു മരക്കട്ടയുംഇരുമ്പുകട്ടയുംപൂർണ്ണമായുംവെള്ളത്തിൽതാഴ്ത്തിയാൽഏതിലാണ് കൂടുതൽപ്ലവക്ഷമബലംഅനുഭവപ്പെടുന്നത്?)O a. Iron block (ഇരുമ്പു കട്ട)b, Wooden block (മരക്കട്ട)c. Same to both (comelmo
Answer» ANSWER: Malayalee..Pwoli wooden block density of wooden block is less..so EVENTHOUGH same MASS different volume. the one with larger volume EXPERIENCES more buoyant force... manasilayi enkil BRAINLIEST mark cheynm

29.

1 point1. It is taken a woodenblock and an Iron block ofsame mass and they arecompletely immersed inwater. Which will beexperienced greaterbuoyancy? (ഒരേമാസുള്ളഒരു മരക്കട്ടയുംഇരുമ്പുകട്ടയുംപൂർണ്ണമായുംവെള്ളത്തിൽതാഴ്ത്തിയാൽഏതിലാണ് കൂടുതൽപ്ലവക്ഷമബലംഅനുഭവപ്പെടുന്നത്?)O a. Iron block (ഇരുമ്പു കട്ട)b, Wooden block (മരക്കട്ട)c. Same to both (comelmo

Answer»

ANSWER:

Malayalee..Pwoli

wooden block

density of wooden block is less..so EVENTHOUGH same MASS different volume.

the one with larger volume EXPERIENCES more buoyant force...

manasilayi enkil BRAINLIEST mark cheynm

Discussion

30.	What is the mass of an object that is hanging 12.6 m above the surface of the earth and has aGPE of 2778.3 J?
Answer» ANSWER: the HUNTER kiled the TIGER

30.

What is the mass of an object that is hanging 12.6 m above the surface of the earth and has aGPE of 2778.3 J?

Answer»

ANSWER:

the HUNTER kiled the TIGER

Discussion

31.	Zero draft thermodynamics provides the basics for the concept of
Answer» ANSWER: HEY buddy Explanation: each TERMINAL

31.

Zero draft thermodynamics provides the basics for the concept of

Answer»

ANSWER:

HEY buddy

Explanation:

each TERMINAL

Discussion

32.	The quantity of matter present in a substance is called its : A: weight B: mass C: density
Answer» EXPLANATION: the above QUESTION ANSWER is MASS because mass is measure of quantity present in it. option B.is correct

32.

The quantity of matter present in a substance is called its : A: weight B: mass C: density

Answer»

EXPLANATION:

the above QUESTION ANSWER is MASS because mass is measure of quantity present in it. option B.is correct

Discussion

33.	calculate the intensity of electric field to the sphere of density 80 ×10^-6 c and radius 2.4 a)at the surface of the sphere. b)at an external point 0.8 m from the surface of the sphere c)at a point .4m from the centre of the sphere
Answer» ANSWER: calculate the INTENSITY of electric field to the SPHERE of density 80 ×10^-6 c and radius 2.4 a)at the surface of the sphere. B)at an external point 0.8 m from the surface of the sphere c)at a point .4m from the centre of the spherecalculate the intensity of electric field to the sphere of density 80 ×10^-6 c and radius 2.4 a)at the surface of the sphere. b)at an external point 0.8 m from the surface of the sphere c)at a point .4m from the centre of the sphere $hii$

33.

calculate the intensity of electric field to the sphere of density 80 ×10^-6 c and radius 2.4 a)at the surface of the sphere. b)at an external point 0.8 m from the surface of the sphere c)at a point .4m from the centre of the sphere

Answer»

ANSWER:

calculate the INTENSITY of electric field to the SPHERE of density 80 ×10^-6 c and radius 2.4 a)at the surface of the sphere. B)at an external point 0.8 m from the surface of the sphere c)at a point .4m from the centre of the spherecalculate the intensity of electric field to the sphere of density 80 ×10^-6 c and radius 2.4 a)at the surface of the sphere. b)at an external point 0.8 m from the surface of the sphere c)at a point .4m from the centre of the sphere

$hii$

Discussion

34.	Calculate the number of moles in 6.022×10^23 molecule of oxygen
Answer» Answer: 1 MOLE..... Explanation: 1 mole CONTAINS AVOGADRO number of oxygen molecules.

34.

Calculate the number of moles in 6.022×10^23 molecule of oxygen

Answer»

Answer:

1 MOLE.....

Explanation:

1 mole CONTAINS AVOGADRO number of oxygen molecules.

Discussion

35.	A string vibrates with a frequency of 250Hz. If the distance between two consecutive troughs of a transverse wave produced in the string is 10cm, find the velocity and time period of the wave.
Answer» ANSWER: given wavelength is 10 cm time period 1/ f= 4× 10 RAISED minus 4 speed is f lamda= 10×250= 2500 cm per SEC

35.

A string vibrates with a frequency of 250Hz. If the distance between two consecutive troughs of a transverse wave produced in the string is 10cm, find the velocity and time period of the wave.

Answer»

ANSWER:

given wavelength is 10 cm

time period 1/ f= 4× 10 RAISED minus 4

speed is f lamda= 10×250= 2500 cm per SEC

Discussion

36.	Hay can u plz say me the best topics for science fair, plz it's urgent
Answer» ANSWER: are u planning to do experiments then u can show that wind energy or the working of METRO ( i did this and we got the 2nd place) or if u R LOOKING for easy and hard then u can show the working of a vaccum cleaner Explanation: if it helps plzz mark as brainliest

36.

Hay can u plz say me the best topics for science fair, plz it's urgent

Answer»

ANSWER:

are u planning to do experiments

then u can show that wind energy

or the working of METRO ( i did this and we got the 2nd place)

or if u R LOOKING for easy and hard then u can show the working of a vaccum cleaner

Explanation:

if it helps

plzz mark as brainliest

Discussion

37.	3) Re-arrange the words to form questions:-
Answer» ANSWER: where is QUESTION GUYS

37.

3) Re-arrange the words to form questions:-

Answer»

ANSWER:

where is QUESTION GUYS

Discussion

38.	pls ans the circled question with detail solution..crct ans with detailed solution will be surely marked as brainliest ...no spam from google
Answer» Answer: A location is the place where a particular POINT or object exists. ... A location is the place where a particular point or object exists. Location is an important term in geography, and is usually CONSIDERED more precise than "place." A locality is a human settlement: CITY, town, village, or even archaeological SITE

38.

pls ans the circled question with detail solution..crct ans with detailed solution will be surely marked as brainliest ...no spam from google

Answer»

Answer:

A location is the place where a particular POINT or object exists. ... A location is the place where a particular point or object exists. Location is an important term in geography, and is usually CONSIDERED more precise than "place." A locality is a human settlement: CITY, town, village, or even archaeological SITE

Discussion

39.	Two bulbs, one of 80 W and another 25 W are connected in series to the main supply of 220 V. What will be the ratio of current following through them
Answer» ANSWER: ktxkgxkgzitxyofursupaoufursuddyxlhzjfxjfYocdhLhzurxkgcjfzlgxgkxgkxkgxkgxhlxgkzgkkgfkfjxkgxkgckgxylzgkxjfzfjfxjfxjgxifxykxtixtxjfxdhzfjzfjzufxfjzruzfuzdhRzurxyxkgcgkcyidkgcjgx

39.

Two bulbs, one of 80 W and another 25 W are connected in series to the main supply of 220 V. What will be the ratio of current following through them

Answer»

ANSWER:

ktxkgxkgzitxyofursupaoufursuddyxlhzjfxjfYocdhLhzurxkgcjfzlgxgkxgkxkgxkgxhlxgkzgkkgfkfjxkgxkgckgxylzgkxjfzfjfxjfxjgxifxykxtixtxjfxdhzfjzfjzufxfjzruzfuzdhRzurxyxkgcgkcyidkgcjgx

Discussion

40.	Examples of electrorefining
Answer» ANSWER: refining of a metal (such as copper) by electrolysis, the CRUDE metal used as the ANODE going into solution and the pure metal being deposited upon the CATHODE. — called ALSO electrolytic refining. Explanation: i hope its help you please mark me as brainlist please

40.

Examples of electrorefining

Answer»

ANSWER:

refining of a metal (such as copper) by electrolysis, the CRUDE metal used as the ANODE going into solution and the pure metal being deposited upon the CATHODE. — called ALSO electrolytic refining.

Explanation:

i hope its help you please mark me as brainlist please

Discussion

41.	A spherical mirror produces an image 48 cm in front of it , when an objet is positioned 12 cm from its pole what is focal length
Answer» EXPLANATION: v=48cm u=12cm f=1/u+1/v f=1/12+1/48 f=0.1041cm

41.

A spherical mirror produces an image 48 cm in front of it , when an objet is positioned 12 cm from its pole what is focal length

Answer»

EXPLANATION:

v=48cm

u=12cm

f=1/u+1/v

f=1/12+1/48

f=0.1041cm

Discussion

42.	A truck of mass 1200kg moving with a velocity of 90km hour collides with a car of mass 1000kg moving towards the truck with a speed of 36km/h. If the collision last for 5 seconds and if after collision they both got stuck to each other and moved together then calculate the velocity of the entangled truck-car system
Answer» EXPLANATION: MASS of the motorcar, M=1200kg Initial velocity of the CAR, u=90 km/h=25 m/s (∵1km/h=185m/s) Final velocity of the car, v=18 km/h=5 m/s TIME taken t=4 s ΔP=mv−mu ΔP=1200×5−1200×25=−24000 KG m/s v=u+at 5=25+a×4 ⟹a=−5 m/s2 (-ve shows retardation) ∣F∣=m∣a∣=1200×5=6000 N

42.

A truck of mass 1200kg moving with a velocity of 90km hour collides with a car of mass 1000kg moving towards the truck with a speed of 36km/h. If the collision last for 5 seconds and if after collision they both got stuck to each other and moved together then calculate the velocity of the entangled truck-car system

Answer»

EXPLANATION:

MASS of the motorcar, M=1200kg

Initial velocity of the CAR, u=90 km/h=25 m/s (∵1km/h=185m/s)

Final velocity of the car, v=18 km/h=5 m/s

TIME taken t=4 s

ΔP=mv−mu

ΔP=1200×5−1200×25=−24000 KG m/s

v=u+at

5=25+a×4

⟹a=−5 m/s2 (-ve shows retardation)

∣F∣=m∣a∣=1200×5=6000 N

Discussion

43.	the length of a rod is measurement as 25.0cm using a scale having an accuracy of 0.1 cm determine the percentage error in length
Answer» ANSWER: The length of a rod is MEASURED as 25.0 cm USING a scale having an accuracy of 0.1 cm. Determine the percentage ERROR in length. I think it is HELPFUL to you

43.

the length of a rod is measurement as 25.0cm using a scale having an accuracy of 0.1 cm determine the percentage error in length

Answer»

ANSWER:

The length of a rod is MEASURED as 25.0 cm USING a scale having an accuracy of 0.1 cm. Determine the percentage ERROR in length.

I think it is HELPFUL to you

Discussion

44.	What is the correct term for the phase changes from solid to gas directly ? A: liquefaction B: sublimation C: vaporization D: Other:
Answer» Answer: OPTION b EXPLANATION: solid to GAS or vice versa is always SUBLIMATION

44.

What is the correct term for the phase changes from solid to gas directly ? A: liquefaction B: sublimation C: vaporization D: Other:

Answer»

Answer:

OPTION b

EXPLANATION:

solid to GAS or vice versa is always SUBLIMATION

Discussion

45.	the territorial extent of India is 3214km from dafdar in the north to Kanyakumari in the south which is the southern most nikobar island in indian ocean in the republic of India
Answer» India lies on the Indian Plate, the NORTHERN part of the Indo-Australian Plate, whose continental crust FORMS the Indian subcontinent. The country is situated north of the equator between 8°4' north to 37°6' north latitude and 68°7' east to 97°25' east longitude.[2] It is the seventh-largest country in the world, with a total area of 3,287,263 square kilometres (1,269,219 sq mi).[3] India measures 3,214 KM (1,997 mi) from north to south and 2,933 km (1,822 mi) from east to west. It has a land FRONTIER of 15,200 km (9,445 mi) and a coastline of 7,516.6 km (4,671 mi). hope this will help you

45.

the territorial extent of India is 3214km from dafdar in the north to Kanyakumari in the south which is the southern most nikobar island in indian ocean in the republic of India

Answer»

India lies on the Indian Plate, the NORTHERN part of the Indo-Australian Plate, whose continental crust FORMS the Indian subcontinent. The country is situated north of the equator between 8°4' north to 37°6' north latitude and 68°7' east to 97°25' east longitude.[2] It is the seventh-largest country in the world, with a total area of 3,287,263 square kilometres (1,269,219 sq mi).[3] India measures 3,214 KM (1,997 mi) from north to south and 2,933 km (1,822 mi) from east to west. It has a land FRONTIER of 15,200 km (9,445 mi) and a coastline of 7,516.6 km (4,671 mi).

hope this will help you

Discussion

46.	Write down the reason for the following
Answer» Explanation: A force can STOP a MOVING BODY= When a force is APPLIED on a moving body in a direction opposite to the direction of motion of the body ,it can stop it

46.

Write down the reason for the following

Answer»

Explanation:

A force can STOP a MOVING BODY=

When a force is APPLIED on a moving body in a direction opposite to the direction of motion of the body ,it can stop it

Discussion

47.	A sedan car of mass 200kg is moving with a certain velocity . It is brought to rest by theapplication of brakes, within a distance of 20m when the average resistance being offered to it is 500N.What was the velocity of the motor car?
Answer» ANSWER: Given, Mass = 200kg Distance = 20m Force = 500N To FIND:- Velocity of the MOTOR car By APPLYING F = ma a = f/m = 500/200 = 2.5m/s^2 By applying v^2-u^2=2as v^2 - 0^2 = 2×2.5×20 v^2 = √100 v = 10m/s.

47.

A sedan car of mass 200kg is moving with a certain velocity . It is brought to rest by theapplication of brakes, within a distance of 20m when the average resistance being offered to it is 500N.What was the velocity of the motor car?

Answer»

ANSWER:

Given,

Mass = 200kg

Distance = 20m

Force = 500N

To FIND:-

Velocity of the MOTOR car

By APPLYING F = ma

a = f/m

= 500/200

= 2.5m/s^2

By applying v^2-u^2=2as

v^2 - 0^2 = 2×2.5×20

v^2 = √100

v = 10m/s.

Discussion

48.	an empty truck weighs 4000n.its engine can produce a maximum acceleration of 1m/s^2.if the truck is loaded with 2000n,find the maximum acceleration the engine can produce.
Answer» Answer: Here is your answer mate Explanation: F = m a F = (4000/g)(1) = 4000/g Newtons same F but now mass is 6000/g 4000/g = (6000/g) a a = 4/6 = .67 m/s^2 *Please follow and MARK as brainliest*

48.

an empty truck weighs 4000n.its engine can produce a maximum acceleration of 1m/s^2.if the truck is loaded with 2000n,find the maximum acceleration the engine can produce.

Answer»

Answer:

Here is your answer mate

Explanation:

F = m a

F = (4000/g)(1) = 4000/g Newtons

same F but now mass is 6000/g

4000/g = (6000/g) a

a = 4/6 = .67 m/s^2

Please follow and MARK as brainliest

Discussion

49.	The acceleration due to gravity g = 4π^2/lt^2. If error in the measurement of l and t are 0.4% and 0.6% respectively. Calculate maximum percentage error? please send answer fast
Answer» ANSWER: what is your NAME BRO have a NICE DAY

49.

The acceleration due to gravity g = 4π^2/lt^2. If error in the measurement of l and t are 0.4% and 0.6% respectively. Calculate maximum percentage error? please send answer fast

Answer»

ANSWER:

what is your NAME BRO have a NICE DAY

Discussion

50.	Write the formula of any one compound.
Answer» Answer: H2 + Cl2 GIVES 2HCl also known as hydrochloric ACID or NACL SODIUM chloride

50.

Write the formula of any one compound.

Answer»

Answer:

H2 + Cl2 GIVES 2HCl also known as hydrochloric ACID

or NACL SODIUM chloride

Discussion

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