67486 + Interview Questions in Secondary School in Physics

1.	On what factors does the frequency of conical pendulum depends
Answer» Explanation: Th frequency of a CONICAL pendulum, of string length L and SEMI vertical angle θ, is N= 2π 1 cosθ g where g is the acceleration due to GRAVITY at the place. From the above expression, we can see that (i) n∝ g (II) n∝ L 1 (iii) n∝ cosθ 1 (if θ , increase, cosθ decrease and n increase) (iv) The frequency is independent of the mass of the bob.

1.

On what factors does the frequency of conical pendulum depends

Answer»

Explanation:

Th frequency of a CONICAL pendulum, of string

length L and SEMI vertical angle θ, is

N=

2π

1

cosθ

g

where g is the acceleration due to GRAVITY at the place.

From the above expression, we can see that

(i) n∝

g

(II) n∝

L

1

(iii) n∝

cosθ

1

(if θ , increase, cosθ decrease and n increase)

(iv) The frequency is independent of the mass of the bob.

Discussion

2.	Drive an expression for differential equations for a particle performing angular shm
Answer» PLEASE FOLLOW me and MAKE me as BRAINLIST.

Discussion

3.	Define conservation of momentum and drive its relation = (m1u1+ m2u2) = m1v1+ m2v2.
Answer» Answer: Explanation: Conservation of momentum: ➝ This states that the total momentum of an isolated system which is free from all other external forces remains constant. ➝ In an isolated system the mutual force between the interacting particles may cause momentum change in the INDIVIDUAL quantities, but the force between each PAIR is equal and opposite and they cancel each other. Hence the total momentum remains unchanged. ➝ Momentum before collission = Momentum after collission Derivation: Based on Newton's third law: ➟ Consider two bodies A and B moving with initial momentums $\sf P_A$ and $\sf P_B$ . ➟ Let the final momentum after collission be $\sf{P_{A^{1} }}$ and $\sf{P_{B^{1} }}$ ➟ Let their masses be m₁ and m₂ and initial velocities be u₁ and u₂ respectively. ➟ Let their final velocities be v₁ and v₂. ➟ Let us assume that they interact WITHIN a short INTERVAL of TIME. That is an impulse is produced. ➟ But we know that, Impulse = Change in momentum Impulse = Force × Time ➟ Hence, $\sf{I_A = F_{AB}\times t = P_{A^{1} }-P_A}$ $\sf{I_B=F_{BA}\times t=P_{B^{1} }-P_B}$ ➟ By Newton's third law we know that, $\sf F_{AB}=-F_{BA}$ ➟ Hence, $\sf F_{AB}\times t = -F_{BA}\times t$ $\sf {P_{A^{1} }-P_A=-(P_{B^{1} }-P_B)}$ $\sf {P_{A^{1} }-P_A=-P_{B^{1} }+P_B}$ $\sf {P_{A^{1} }+P_{B^{1} }=P_A+P_B}$ ➟ But we know that, Momentum = Mass × Velocity ➟ Therefore, m₁v₁ + m₂v₂ = m₁u₁ + m₂v₂ ➟ Hence proved. Based on Newton's second law: ➟ By Newton's second law we know that rate of change of momentum is directly proportional to the force applied. $\sf \dfrac{\Delta P}{\Delta t} =F$ ➟ But we know that the system is isolated, there are no external forces acting on it. ➟ Hence, F = 0 $\sf \dfrac{\Delta P}{\Delta t} =0$ Δ P = 0 ➟ Momentum change = 0 ➟ There is no change in momentum. That is P is a constant.

3.

Define conservation of momentum and drive its relation = (m1u1+ m2u2) = m1v1+ m2v2.

Answer»

Answer:

Explanation:

Conservation of momentum:

➝ This states that the total momentum of an isolated system which is free from all other external forces remains constant.

➝ In an isolated system the mutual force between the interacting particles may cause momentum change in the INDIVIDUAL quantities, but the force between each PAIR is equal and opposite and they cancel each other. Hence the total momentum remains unchanged.

➝ Momentum before collission = Momentum after collission

Derivation:

Based on Newton's third law:

➟ Consider two bodies A and B moving with initial momentums $\sf P_A$ and $\sf P_B$ .

➟ Let the final momentum after collission be $\sf{P_{A^{1} }}$ and $\sf{P_{B^{1} }}$

➟ Let their masses be m₁ and m₂ and initial velocities be u₁ and u₂ respectively.

➟ Let their final velocities be v₁ and v₂.

➟ Let us assume that they interact WITHIN a short INTERVAL of TIME. That is an impulse is produced.

➟ But we know that,

Impulse = Change in momentum

Impulse = Force × Time

➟ Hence,

$\sf{I_A = F_{AB}\times t = P_{A^{1} }-P_A}$

$\sf{I_B=F_{BA}\times t=P_{B^{1} }-P_B}$

➟ By Newton's third law we know that,

$\sf F_{AB}=-F_{BA}$

➟ Hence,

$\sf F_{AB}\times t = -F_{BA}\times t$

$\sf {P_{A^{1} }-P_A=-(P_{B^{1} }-P_B)}$

$\sf {P_{A^{1} }-P_A=-P_{B^{1} }+P_B}$

$\sf {P_{A^{1} }+P_{B^{1} }=P_A+P_B}$

➟ But we know that,

Momentum = Mass × Velocity

➟ Therefore,

m₁v₁ + m₂v₂ = m₁u₁ + m₂v₂

➟ Hence proved.

Based on Newton's second law:

➟ By Newton's second law we know that rate of change of momentum is directly proportional to the force applied.

$\sf \dfrac{\Delta P}{\Delta t} =F$

➟ But we know that the system is isolated, there are no external forces acting on it.

➟ Hence,

F = 0

$\sf \dfrac{\Delta P}{\Delta t} =0$

Δ P = 0

➟ Momentum change = 0

➟ There is no change in momentum. That is P is a constant.

Discussion

4.	What is the greatest contribution of Francisco Reyes Aquino to the Philippine Folkdance?
Answer» ANSWER: Answer: Answer: The Law of Conservation of Mass The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system. Lavoisier's finding laid the FOUNDATION for modern chemistry and revolutionized science. The Law of Conservation of Mass holds true because naturally occurring elements are very STABLE at the conditions found on the surface of the Earth. Most elements come from fusion reactions found only in STARS or supernovae. Therefore, in the everyday world of Earth, from the peak of the highest mountain to the depths of the deepest ocean, ATOMS are not converted to other elements during chemical reactions. Because of this, individual atoms that make up living and nonliving matter are very old and each atom has a history. An individual atom of a biologically important element, such as carbon, may have spent 65 million years buried as coal before being burned in a power plant, followed by two decades in Earth's atmosphere before being dissolved in the ocean, and then taken up by an algal cell that was consumed by a copepod before being respired and again entering Earth's atmosphere (Figure 1). The atom itself is neither created nor destroyed but cycles among chemical compounds. Ecologists can apply the law of conservation of mass to the analysis of elemental cycles by conducting a mass balance. These analyses are as important to the progress of ecology as Lavoisier's findings were to chemistry. Mark as brainiest...❤ Thank my answers...❤. God bless u❤... May god give us a good knowledge...❤

4.

What is the greatest contribution of Francisco Reyes Aquino to the Philippine Folkdance?

Answer»

ANSWER:

Answer:

The Law of Conservation of Mass

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system. Lavoisier's finding laid the FOUNDATION for modern chemistry and revolutionized science.

The Law of Conservation of Mass holds true because naturally occurring elements are very STABLE at the conditions found on the surface of the Earth. Most elements come from fusion reactions found only in STARS or supernovae. Therefore, in the everyday world of Earth, from the peak of the highest mountain to the depths of the deepest ocean, ATOMS are not converted to other elements during chemical reactions. Because of this, individual atoms that make up living and nonliving matter are very old and each atom has a history. An individual atom of a biologically important element, such as carbon, may have spent 65 million years buried as coal before being burned in a power plant, followed by two decades in Earth's atmosphere before being dissolved in the ocean, and then taken up by an algal cell that was consumed by a copepod before being respired and again entering Earth's atmosphere (Figure 1). The atom itself is neither created nor destroyed but cycles among chemical compounds. Ecologists can apply the law of conservation of mass to the analysis of elemental cycles by conducting a mass balance. These analyses are as important to the progress of ecology as Lavoisier's findings were to chemistry.

Mark as brainiest...❤

Thank my answers...❤.

God bless u❤...

May god give us a good knowledge...❤

Discussion

5.	Plz tell it fast .........
Answer» Answer: 10 YEARS..... HOPE it HELPS

5.

Plz tell it fast .........

Answer»

Answer:

10 YEARS.....

HOPE it HELPS

Discussion

6.	2. Given that the maximum height reached by a body when it is thrown vertically upwards with initial velocity andacceleration due to gravity derive an expression for the maximum height attained by it, by the method ofdimensionsLondo
Answer» EXPLANATION: GH hvvhjxgjcfcgucgyfy

6.

2. Given that the maximum height reached by a body when it is thrown vertically upwards with initial velocity andacceleration due to gravity derive an expression for the maximum height attained by it, by the method ofdimensionsLondo

Answer»

EXPLANATION:

GH hvvhjxgjcfcgucgyfy

Discussion

7.	Check the correctness of the equation P = pgh where P = pressure, p density of the liquid, 8-acceleration dueTo gravity h=depth of the liquid
Answer» Answer: to check your correctness of phisycal equation ,v=u +at,Whare 'u'is the INITIAL velocity ,'a' is the ACCELARATION and 't' is the TIME in which change occurs Explanation: HOPE it's helpful for you take care of yours please mark as brainlist dear

7.

Check the correctness of the equation P = pgh where P = pressure, p density of the liquid, 8-acceleration dueTo gravity h=depth of the liquid

Answer»

Answer:

to check your correctness of phisycal equation ,v=u +at,Whare 'u'is the INITIAL velocity ,'a' is the ACCELARATION and 't' is the TIME in which change occurs

Explanation:

HOPE it's helpful for you

take care of yours

please mark as brainlist dear

Discussion

8.	If you are going to choose one of the Folkdance of the Philippines, what Folkdance it is and Why?
Answer» ANSWER: Tinkling is the traditional FOLK DANCE in PHILIPPINES

8.

If you are going to choose one of the Folkdance of the Philippines, what Folkdance it is and Why?

Answer»

ANSWER:

Tinkling is the traditional FOLK DANCE in PHILIPPINES

Discussion

9.	23. Beaker A and Beaker B contain a solution of potassium permanganate and amixture of chalk powder in water. Mention any two differences that you wouldobserve in the two mixturesplssss
Answer» ANSWER: In beaker A the particles of the solute(potassium PERMANGANATE) do not settle down while the sediment of chalk in Beaker B settles down and clear water collects above. THEREFORE The mixture in A is a homogeneous mixture while the mixture in B is a theterogeneous mixture. A : Uniform composition/particles not visible. B : Non-uniform composition/particle MAY be visible. Therefore, A is homogeneous and B is heterogeneous. Explanation: please do follow me.

9.

23. Beaker A and Beaker B contain a solution of potassium permanganate and amixture of chalk powder in water. Mention any two differences that you wouldobserve in the two mixturesplssss

Answer»

ANSWER:

In beaker A the particles of the solute(potassium PERMANGANATE) do not settle down while the sediment of chalk in Beaker B settles down and clear water collects above. THEREFORE The mixture in A is a homogeneous mixture while the mixture in B is a theterogeneous mixture.

A : Uniform composition/particles not visible.

B : Non-uniform composition/particle MAY be visible.

Therefore, A is homogeneous and B is heterogeneous.

Explanation:

please do follow me.

Discussion

10.	Dimethyl ether and Methyl n-propyl ether shows *
Answer» Explanation: C 2 H5−O−C2 H5 CH3−O−C3 H 7 diethylether n-propymethylether Metamerism is when there are different number of carbon atoms at EITHER SIDE of the FUNCTIONAL group. Diethylether has two carbons on both sides, so it is symmetric and n-PROPYL methyl ether has one methyl and one propyl on either sides. Hence, both are METAMERS.

10.

Dimethyl ether and Methyl n-propyl ether shows *

Answer»

Explanation:

C 2 H5−O−C2 H5 CH3−O−C3 H 7

diethylether n-propymethylether

Metamerism is when there are different number of carbon atoms at EITHER SIDE of the FUNCTIONAL group. Diethylether has two carbons on both sides, so it is symmetric and n-PROPYL methyl ether has one methyl and one propyl on either sides. Hence, both are METAMERS.

Discussion

11.	a train moving northwards with a speed of 72 km/h a monkey is running on the roof of the train with a speed of 5ms with respect to train find the velocity of the monkey as observed by a man standing on the ground if the monkey is running northwards or southwards
Answer» ANSWER: Explanation: SELLING price of a toy car is ₹750 , if the profit made by SHOPKEEPER is 20%,what is the cost price of this toy ?

11.

a train moving northwards with a speed of 72 km/h a monkey is running on the roof of the train with a speed of 5ms with respect to train find the velocity of the monkey as observed by a man standing on the ground if the monkey is running northwards or southwards

Answer»

ANSWER:

Explanation:

SELLING price of a toy car is ₹750 , if the profit made by SHOPKEEPER is 20%,what is the cost price of this toy ?

Discussion

12.	Which part of drum/tabla produce sound
Answer» Explanation: SOUND is created by A vibrating OBJECT for EXAMPLE when a drum is struck the festivals in sometimes CALLED a MEMBRANE of the drum vibrates hope this will help you

12.

Which part of drum/tabla produce sound

Answer»

Explanation: SOUND is created by A vibrating OBJECT for EXAMPLE when a drum is struck the festivals in sometimes CALLED a MEMBRANE of the drum vibrates

hope this will help you

Discussion

13.	Calculate the force of attraction between the earth and the sun
Answer» $\red{heya}$ mass of the earth = 6 x 1024 KG, mass of the sun = 2 x 1030 kg, AVERAGE distance between the two is 1.5 x 10-11 m and G = 6.67 x 10-11 Nm2kg-2 .

13.

Calculate the force of attraction between the earth and the sun

Answer»

$\red{heya}$

mass of the earth = 6 x 1024 KG, mass of the sun = 2 x 1030 kg, AVERAGE distance between the two is 1.5 x 10-11 m and G = 6.67 x 10-11 Nm2kg-2 .

Discussion

14.	In which mode LED is operated
Answer» EXPLANATION: It is in 3D MODE JPEG FORMAT

14.

In which mode LED is operated

Answer»

EXPLANATION:

It is in 3D MODE JPEG FORMAT

Discussion

15.	Ethyl alcohol and Dimethyl ether are ___________ isomers of each other *2 pointsChainFunctional groupMetamersTautomers
Answer» FUNCTIONAL GROUP ISOMERS

15.

Ethyl alcohol and Dimethyl ether are ___________ isomers of each other *2 pointsChainFunctional groupMetamersTautomers

Answer»

FUNCTIONAL GROUP ISOMERS

Discussion

16.	A man comes to rest from a velocity of 10 metre per second if acceleration is 4 metre per second square calculate the initial velocity with solve the question
Answer» GF r9ejryr8r8ifut88rj4

Discussion

17.	How can you prove that lences are important
Answer» I HOPE UNDERSTAND better Answer: for our EYES

17.

How can you prove that lences are important

Answer»

I HOPE UNDERSTAND better

Answer:

for our EYES

Discussion

18.	The maximum value of force such that the block does not move where cofficient of friction is
Answer» ANSWER: SORRY i TRIED this but i ALSO don't KNOW

18.

The maximum value of force such that the block does not move where cofficient of friction is

Answer»

ANSWER:

SORRY i TRIED this but i ALSO don't KNOW

Discussion

19.	An example of an amal gum?
Answer» example of an AMALGAM is a mixture of silver and MERCURY which is used as a dental filling. Any of various alloys of mercury with other metals, ESPECIALLY: ... An alloy of mercury and tin used in SILVERING mirrors pls follow me and mark me as brainliest and pls follow me for more answers

19.

An example of an amal gum?

Answer»

example of an AMALGAM is a mixture of silver and MERCURY which is used as a dental filling. Any of various alloys of mercury with other metals, ESPECIALLY: ... An alloy of mercury and tin used in SILVERING mirrors

pls follow me and mark me as brainliest

and pls follow me for more answers

Discussion

20.	Perspex is a form of transparent plastic. It has a refractive index n = 1.50. A ray of light strikes the flat surface of a Perspex block with an angle of incidence of 40". What will be the angle of refraction?
Answer» Answer: the REFRACTIVE index = 0.428 Explanation: n=1.5 i =40° r = ? n = sini/SINR => 1.5= SIN40/ sinr =>SIN r= sin40°/1.5 =0.643/1.5=0.428

20.

Perspex is a form of transparent plastic. It has a refractive index n = 1.50. A ray of light strikes the flat surface of a Perspex block with an angle of incidence of 40". What will be the angle of refraction?

Answer»

Answer:

the REFRACTIVE index = 0.428

Explanation:

n=1.5

i =40°

r = ?

n = sini/SINR => 1.5= SIN40/ sinr =>SIN r= sin40°/1.5

=0.643/1.5=0.428

Discussion

21.	An inductor coil gives a current of 2 amp with 100volt d. c and the same gives 1 amp of current with 100 volt a. c. Then calculate phase angle between voltage and current?
Answer» ANSWER: sedwdwd Explanation:

21.

An inductor coil gives a current of 2 amp with 100volt d. c and the same gives 1 amp of current with 100 volt a. c. Then calculate phase angle between voltage and current?

Answer»

ANSWER:

sedwdwd

Explanation:

Discussion

22.	A car travelled 300km per30 seconds. what is the average speed ?
Answer» Answer: 10 is the AVERAGE spped it is RIGHT ans make me as BRAINLIST

22.

A car travelled 300km per30 seconds. what is the average speed ?

Answer»

Answer:

10 is the AVERAGE spped

it is RIGHT ans

make me as BRAINLIST

Discussion

23.	Dervation of 4th equation of motion
Answer» Answer: To derive the fourth equation of motion, first we have to CONSIDER the equation for ACCELERATION and then to REARRANGE it. or v2 = u2 + 2as and this equation of motion can be used to FIND the final velocity or the distance TRAVELLED if the other values are given.

23.

Dervation of 4th equation of motion

Answer»

Answer:

To derive the fourth equation of motion, first we have to CONSIDER the equation for ACCELERATION and then to REARRANGE it. or v2 = u2 + 2as and this equation of motion can be used to FIND the final velocity or the distance TRAVELLED if the other values are given.

Discussion

24.	Tall.Q. No:11 Define relative density. Give the relative density of water.
Answer» Answer: Relative density is the ratio of the density (mass of a unit VOLUME) of a substance to the density of a given reference material (i.e., water). It is usually measured at room temperature (20 CELCIUS degrees) and standard atmosphere (101.325kPa). It is unitless. In SI units, the density of water is (approximately) 1000 kg/m3 or 1 g/cm3, which MAKES relative density calculations particularly CONVENIENT: the density of the OBJECT only needs to be divided by 1000 or 1, depending on the units. Hope this helps you

24.

Tall.Q. No:11 Define relative density. Give the relative density of water.

Answer»

Answer:

Relative density is the ratio of the density (mass of a unit VOLUME) of a substance to the density of a given reference material (i.e., water). It is usually measured at room temperature (20 CELCIUS degrees) and standard atmosphere (101.325kPa). It is unitless.

In SI units, the density of water is (approximately) 1000 kg/m3 or 1 g/cm3, which MAKES relative density calculations particularly CONVENIENT: the density of the OBJECT only needs to be divided by 1000 or 1, depending on the units.

Hope this helps you

Discussion

25.	0.4 Show that the de Broglie wavelength of an electron is equal to its Compton wavelengewhen its speed is 2 where is speed of light. Also calculate A of electron acceleratedthrough a potential difference of 100 V
Answer» ANSWER: xqjwwhxanavaajvvh. hshsb. HHH nhsjja

25.

0.4 Show that the de Broglie wavelength of an electron is equal to its Compton wavelengewhen its speed is 2 where is speed of light. Also calculate A of electron acceleratedthrough a potential difference of 100 V

Answer»

ANSWER:

xqjwwhxanavaajvvh. hshsb. HHH nhsjja

Discussion

26.	Define conservation of momentum and drive its relation - (mju, + m2u2) = m/Vi+ m2v2.
Answer» Explanation: Conservation of momentum is a FUNDAMENTAL law of physics , which STATES that the total momentum of an isolated SYSTEM is CONSERVED.

26.

Define conservation of momentum and drive its relation - (mju, + m2u2) = m/Vi+ m2v2.

Answer»

Explanation:

Conservation of momentum is a FUNDAMENTAL law of physics , which STATES that the total momentum of an isolated SYSTEM is CONSERVED.

Discussion

27.	(b) one way to reduce the moment of force about a givenaxis of rotation
Answer» ANSWER: GREATER the MOMENT of FORCE greater the PERPENDICULAR distance. Explanation: Áyúśh.

27.

(b) one way to reduce the moment of force about a givenaxis of rotation

Answer»

ANSWER:

GREATER the MOMENT of FORCE greater the PERPENDICULAR distance.

Explanation:

Áyúśh.

Discussion

28.	Conductors of electricity, like metals, are used for making connecting wiresand other electrical components. Similarly, suggest two applications of insulators of electricity in our day- to-day life
Answer» INSULATORS are used to protect PEOPLE from electrical equipment to prevent HEAT BURNS or electric SHOCKS.

Discussion

29.	একটি অ্যামাল গামের ঊদাহরণ
Answer» ANSWER: BHAI api language samaj nahi aa rahi HAI ENG ma LIKE

29.

একটি অ্যামাল গামের ঊদাহরণ

Answer»

ANSWER:

BHAI api language samaj nahi aa rahi HAI ENG ma LIKE

Discussion

30.	Suggest some changes in arrangement of different components gases to make it more efficient
Answer» ANSWER: SORRY don't KNOW the answer

30.

Suggest some changes in arrangement of different components gases to make it more efficient

Answer»

ANSWER:

SORRY don't KNOW the answer

Discussion

31.	Linear magnification produced by a lens Linear magnification produced by a lens
Answer» ${\fbox{\fbox{\huge\sf\pink{QuesTiOn}}}}$ $\sf\green{→What\: is\: Linear\: magnification \:produced}$ $\sf\green{ \:by\: a \:lens?}$ ${\fbox{\fbox{\huge\sf\red{AnsWeR}}}}$ →ᴛʜᴇ ʟɪɴᴇᴀʀ ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴘʀᴏᴅᴜᴄᴇᴅ ʙʏ ᴀ ʟᴇɴs ɪs ᴅᴇғɪɴᴇᴅ ᴀs ᴛʜᴇ ʀᴀᴛɪᴏ ᴏғ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ɪᴍᴀɢᴇ ғᴏʀᴍᴇᴅ ʙʏ ᴛʜᴇ ʟᴇɴs ᴛᴏ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ. $\sf\purple{→Linear \:magnification =>\frac{length \:of \:<klux>IMAGE</klux> }{length\: of\: <klux>OBJECT</klux> }}$ ☞KNOW MORE -: →ʟɪɴᴇᴀʀ ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴘʀᴏᴅᴜᴄᴇᴅ ʙʏ ᴀ sᴘʜᴇʀɪᴄᴀʟ ᴍɪʀʀᴏʀ ɪs ᴛʜᴇ ʀᴀᴛɪᴏ ᴏғ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ɪᴍᴀɢᴇ ғᴏʀᴍᴇᴅ ʙʏ ᴛʜᴇ ᴍɪʀʀᴏʀ sᴏ ᴛʜᴀᴛ ᴏғ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ. $\sf\blue{⇒ m=>\frac{I}{O}}$ where, I = Image SIZE And, O = Object size

31.

Linear magnification produced by a lens Linear magnification produced by a lens

Answer»

${\fbox{\fbox{\huge\sf\pink{QuesTiOn}}}}$

$\sf\green{→What\: is\: Linear\: magnification \:produced}$ $\sf\green{ \:by\: a \:lens?}$

${\fbox{\fbox{\huge\sf\red{AnsWeR}}}}$

→ᴛʜᴇ ʟɪɴᴇᴀʀ ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴘʀᴏᴅᴜᴄᴇᴅ ʙʏ ᴀ ʟᴇɴs ɪs ᴅᴇғɪɴᴇᴅ ᴀs ᴛʜᴇ ʀᴀᴛɪᴏ ᴏғ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ɪᴍᴀɢᴇ ғᴏʀᴍᴇᴅ ʙʏ ᴛʜᴇ ʟᴇɴs ᴛᴏ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ.

$\sf\purple{→Linear \:magnification =>\frac{length \:of \:<klux>IMAGE</klux> }{length\: of\: <klux>OBJECT</klux> }}$

☞KNOW MORE -:

→ʟɪɴᴇᴀʀ ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴘʀᴏᴅᴜᴄᴇᴅ ʙʏ ᴀ sᴘʜᴇʀɪᴄᴀʟ ᴍɪʀʀᴏʀ ɪs ᴛʜᴇ ʀᴀᴛɪᴏ ᴏғ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ɪᴍᴀɢᴇ ғᴏʀᴍᴇᴅ ʙʏ ᴛʜᴇ ᴍɪʀʀᴏʀ sᴏ ᴛʜᴀᴛ ᴏғ ᴛʜᴇ sɪᴢᴇ ᴏғ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ.

$\sf\blue{⇒ m=>\frac{I}{O}}$

where, I = Image SIZE

And, O = Object size

Discussion

32.	An objec travels with uniform acceleration 2 sec then rest for anther 2 sec and then come to rest by 6th second,Draw the velocity time graph ofthe object
Answer» ANSWER: hiiiiiiiiiiiiiiii......... EXPLANATION: GIVE FOLLOW...... ........TAKE follow

32.

An objec travels with uniform acceleration 2 sec then rest for anther 2 sec and then come to rest by 6th second,Draw the velocity time graph ofthe object

Answer»

ANSWER:

hiiiiiiiiiiiiiiii.........

EXPLANATION:

GIVE FOLLOW......

........TAKE follow

Discussion

33.	Write equation of moment of inertia of rotating rigid body
Answer» ANSWER: WRITE EQUATION of moment of inertia of rotating rigid BODY Explanation: For a rigid body :I=∫r2đm. please MARK me as brainist

33.

Write equation of moment of inertia of rotating rigid body

Answer»

ANSWER:

WRITE EQUATION of moment of inertia of rotating rigid BODY

Explanation:

For a rigid body :I=∫r2đm.

please MARK me as brainist

Discussion

34.	Which one of the following is not used to reduce friction
Answer» Answer: STREAMLINED SHAPE Explanation: streamlined shape is most COMMONLY seen in examples such as air vehicles.....in order to increase the efficiency in which the vehicle is moving.....the streamlined shape could also be obvious in the POSITION of bikers.....this is done in order to cut through the air resistance... HOPE u found the answer helpful

34.

Which one of the following is not used to reduce friction

Answer»

Answer:

STREAMLINED SHAPE

Explanation:

streamlined shape is most COMMONLY seen in examples such as air vehicles.....in order to increase the efficiency in which the vehicle is moving.....the streamlined shape could also be obvious in the POSITION of bikers.....this is done in order to cut through the air resistance...

HOPE u found the answer helpful

Discussion

35.	20 (iv) The image shows earth with its moonThe mass of the earth is ml and that of moon is m2. They are separated by distanceWhich statement is in accordance with the Newton's third law of motion?a) The acceleration due to gravity on earth is equal to that on moonb) The acceleration due to gravity on earth is greater to that on moonc) Gravitational force due to the earth on moon is equal to that due to moon on theearthd) Gravitational force due to the earth on moon is greater than that due to moon onthe earth
Answer» Answer: I think c) GRAVITATIONAL force due to the EARTH on MOON is equal than that due to moon on the earth hope it HELPS!

35.

20 (iv) The image shows earth with its moonThe mass of the earth is ml and that of moon is m2. They are separated by distanceWhich statement is in accordance with the Newton's third law of motion?a) The acceleration due to gravity on earth is equal to that on moonb) The acceleration due to gravity on earth is greater to that on moonc) Gravitational force due to the earth on moon is equal to that due to moon on theearthd) Gravitational force due to the earth on moon is greater than that due to moon onthe earth

Answer»

Answer:

I think c) GRAVITATIONAL force due to the EARTH on MOON is equal than that due to moon on the earth

hope it HELPS!

Discussion

36.	"Every SHM is periodic motion but every periodic motion need not be SHM."(a) State whether the statement is true or false. Justify your answer with an example.(b) What do you mean by seconds pendulum ?(c) What will be the period of oscillation, if the length of a seconds pendulum ishalved ?
Answer» ANSWER: EVERY SHM is periodic MOTION but every periodic motion NEED not be SHM. F= -kx is to be satisfied and this not possible always. But every SHM is periodic because like any other periodic motion (that repeats after a fixed interval of TIME) in SHM Also body repeats its path after a fixed tim

36.

"Every SHM is periodic motion but every periodic motion need not be SHM."(a) State whether the statement is true or false. Justify your answer with an example.(b) What do you mean by seconds pendulum ?(c) What will be the period of oscillation, if the length of a seconds pendulum ishalved ?

Answer»

ANSWER:

EVERY SHM is periodic MOTION but every periodic motion NEED not be SHM. F= -kx is to be satisfied and this not possible always. But every SHM is periodic because like any other periodic motion (that repeats after a fixed interval of TIME) in SHM Also body repeats its path after a fixed tim

Discussion

37.	A bus decreases its speed from 90m/s to 50m/s in 5 seconds.Find its retardation ?
Answer» Answer: I can't UNDERSTAND what is meaning of your questions Explanation: PLEASE REFRESH or try again later

37.

A bus decreases its speed from 90m/s to 50m/s in 5 seconds.Find its retardation ?

Answer»

Answer:

I can't UNDERSTAND what is meaning of your questions

Explanation:

PLEASE REFRESH or try again later

Discussion

38.	Which cloud has larger rain drops compared to other clouds?
Answer» Some may produce rain or snow that evaporates before reaching the ground, and most clouds produce no PRECIPITATION at all. When rain FALLS, we know from measurements that the drops are larger than one millimeter. A raindrop of diameter 2 mm contains the water equivalent of a million CLOUD DROPLETS (0.02 mm diameter)

38.

Which cloud has larger rain drops compared to other clouds?

Answer»

Some may produce rain or snow that evaporates before reaching the ground, and most clouds produce no PRECIPITATION at all. When rain FALLS, we know from measurements that the drops are larger than one millimeter. A raindrop of diameter 2 mm contains the water equivalent of a million CLOUD DROPLETS (0.02 mm diameter)

Discussion

39.	Remove the mirror and the paper pins.
Answer» ANSWER: OK.........................

39.

Remove the mirror and the paper pins.

Answer»

ANSWER:

OK.........................

Discussion

40.	Define surface energy of liquid layer
Answer» ANSWER: Liquids will often have LOWER surface energies than SOLIDS (due to the weak FORCES interacting between molecules), which is why liquids usually spread out. Surface energy can be defined as the energy required per unit area to increase the size of the surface, and as such is often quoted in UNITS of mN/m.

40.

Define surface energy of liquid layer

Answer»

ANSWER:

Liquids will often have LOWER surface energies than SOLIDS (due to the weak FORCES interacting between molecules), which is why liquids usually spread out. Surface energy can be defined as the energy required per unit area to increase the size of the surface, and as such is often quoted in UNITS of mN/m.

Discussion

41.	Anyone can draw for me please this diagram pleasthis is my physics assignment and I can't do it
Answer» Answer: class class *real* *feel* so *full* *full* *full* *full* *Ital* *yakeen* *tttff* *acc* HH *tttff* kk *assign* *JAL* *Sam* EK *dum* dn cm

41.

Anyone can draw for me please this diagram pleasthis is my physics assignment and I can't do it

Answer»

Answer:

class class real feel so full full full full Ital yakeen tttff acc HH tttff kk assign JAL Sam EK dum dn cm

Discussion

42.	Number of of neutrons in C-12, C-13 and C-14 are respectively *2 points8,7,66,7,85,6,76,7,9
Answer» 6,7,8 is the ANSWER . THANK you

42.

Number of of neutrons in C-12, C-13 and C-14 are respectively *2 points8,7,66,7,85,6,76,7,9

Answer»

6,7,8 is the ANSWER .

THANK you

Discussion

43.	19 An archer stretches her bow while taking aim at the target. She then releases the arrow,which begins to move towards the target. Based on this information fill up the gaps inthe following statements using the following terms:Muscular, contact, non-contact, gravity, friction, shape, attractiona) To stretch the bow, the archer applies a force that causes a change in itsb) The force applied by the archer to stretch the bow is an example offorce.c) The type of force responsible for a change in the state of motion of the arrow isan example of aforce.d) While the arrow moves towards its target, the forces action on it is duetoand that due toof air.
Answer» ANSWER: a)shape b)mascular c)contact d)GRAVITY

43.

19 An archer stretches her bow while taking aim at the target. She then releases the arrow,which begins to move towards the target. Based on this information fill up the gaps inthe following statements using the following terms:Muscular, contact, non-contact, gravity, friction, shape, attractiona) To stretch the bow, the archer applies a force that causes a change in itsb) The force applied by the archer to stretch the bow is an example offorce.c) The type of force responsible for a change in the state of motion of the arrow isan example of aforce.d) While the arrow moves towards its target, the forces action on it is duetoand that due toof air.

Answer»

ANSWER:

a)shape

b)mascular

c)contact

d)GRAVITY

Discussion

44.	Calculate the gyromagnetic ratio of electron.(given e = 1.6 × 10–19C, Me = 9.1 × 10–31 kg)
Answer» EXPLANATION: Magnetic moment μ=evr/2 ANGULAR momentum L=mvr Gyromagnetic ratio is the ratio of magnetic moment of the PARTICLE to its angular momentum. ∴ γ= L μ = mvr evr/2 ⟹ γ= 2m e Or 8.8×10 10 = 2m 1.6×10 −19 ⟹ m= 11 1 ×10 −29 kg

44.

Calculate the gyromagnetic ratio of electron.(given e = 1.6 × 10–19C, Me = 9.1 × 10–31 kg)

Answer»

EXPLANATION:

Magnetic moment μ=evr/2

ANGULAR momentum L=mvr

Gyromagnetic ratio is the ratio of magnetic moment of the PARTICLE to its angular momentum.

∴ γ=

L

μ

=

mvr

evr/2

⟹ γ=

2m

e

Or 8.8×10

10

=

2m

1.6×10

−19

⟹ m=

11

1

×10

−29

kg

Discussion

45.	Neha wants to construct a simple electric circuit for her science project.How many minimum parts or elements she needs for making the circuit and name these parts
Answer» Answer: Building a Simple Circuit with a Battery Gather the necessary materials. Strip the ends of the insulated wires. Install batteries into the battery PACK. Attach your wires to the battery pack. FASTEN the other end of the wire to the METAL screw of the BULB holder. Test your circuit I hope the definition is correct!

45.

Neha wants to construct a simple electric circuit for her science project.How many minimum parts or elements she needs for making the circuit and name these parts

Answer»

Answer:

Building a Simple Circuit with a Battery Gather the necessary materials. Strip the ends of the insulated wires. Install batteries into the battery PACK. Attach your wires to the battery pack. FASTEN the other end of the wire to the METAL screw of the BULB holder. Test your circuit

I hope the definition is correct!

Discussion

46.	A) With the help of an activity, explain the chemical effects caused by electric currentnorite the process by which a connor
Answer» ANSWER: zdsfxcghbjklolokjhgyftdrserdtfyguhijokpl Explanation:

46.

A) With the help of an activity, explain the chemical effects caused by electric currentnorite the process by which a connor

Answer»

ANSWER:

zdsfxcghbjklolokjhgyftdrserdtfyguhijokpl

Explanation:

Discussion

47.	Number of of neutrons in C-12, C-13 and C-14 are respectively *
Answer» Hi friend, here is your answer PLEASE FOLLOW me Answer: C12 - 12 C13 - 13 C14 - 14 hope it HELPS you and you understood if helps please follow me

47.

Number of of neutrons in C-12, C-13 and C-14 are respectively *

Answer»

Hi friend,

here is your answer

PLEASE FOLLOW me

Answer:

C12 - 12

C13 - 13

C14 - 14

hope it HELPS you and you understood

if helps please follow me

Discussion

48.	"Every SHM is periodic motion but every periodic motion need not be SHM".justify the answer with an example
Answer» Explanation: in oscillation the particle repeats is path after EVERY equal interval of time but in SHM the motion is TWO and FRO example - a particle undergoing circular motion is a oscillation but not SHM But a pendulum undergoing motion is SHM as well as oscillation

48.

"Every SHM is periodic motion but every periodic motion need not be SHM".justify the answer with an example

Answer»

Explanation:

in oscillation the particle repeats is path after EVERY equal interval of time

but in SHM the motion is TWO and FRO

example - a particle undergoing circular motion is a oscillation but not SHM

But a pendulum undergoing motion is SHM as well as oscillation

Discussion

49.	PLS RESPOND!!!Two bodies of masses 8 kg and 32 kg are placed at a distance 12 m. Athird bodyof mass 5 kg is to be placed at such a point that the force acting on this bodis zero.Find the position of that point.
Answer» ANSWER: PLEASE FOLLOW me Explanation: please MARK me as BRAINLIEST

49.

PLS RESPOND!!!Two bodies of masses 8 kg and 32 kg are placed at a distance 12 m. Athird bodyof mass 5 kg is to be placed at such a point that the force acting on this bodis zero.Find the position of that point.

Answer»

ANSWER:

PLEASE FOLLOW me

Explanation:

please MARK me as BRAINLIEST

Discussion

50.	The kinetic energy of a cat running with a speed of 10m/s is 500 J . Find the kinetic energy of the cat :i) If the speed is doubled ii) If the speed is tripled if you answer correctly I will follow u and give 5 star ratings
Answer» 1/2mv² = 500J v = 10m/s Thus, 1/2m10²= 500 m = 10kg Now speed is doubled So v = 20m/s K.E = 1/2mv² = 1/2102020 = 2000J Now speed is tripled so v = 30m/s K. E = 1/2mv² = 1/2 103030 = 4500J this you gotta your ANSWER

50.

The kinetic energy of a cat running with a speed of 10m/s is 500 J . Find the kinetic energy of the cat :i) If the speed is doubled ii) If the speed is tripled if you answer correctly I will follow u and give 5 star ratings

Answer»

1/2mv² = 500J

v = 10m/s

Thus,

1/2*m*10²= 500

m = 10kg

Now speed is doubled

So

v = 20m/s

K.E = 1/2mv²

= 1/2*10*20*20

= 2000J

Now speed is tripled

so v = 30m/s

K. E = 1/2mv²

= 1/2* 10*30*30

= 4500J

this you gotta your ANSWER

Discussion

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☞KNOW MORE -:

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Define conservation of momentum and drive its relation = (m1u1+ m2u2) = m1v1+ m2v2.

What is the greatest contribution of Francisco Reyes Aquino to the Philippine Folkdance?

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Check the correctness of the equation P = pgh where P = pressure, p density of the liquid, 8-acceleration dueTo gravity h=depth of the liquid

If you are going to choose one of the Folkdance of the Philippines, what Folkdance it is and Why?

23. Beaker A and Beaker B contain a solution of potassium permanganate and amixture of chalk powder in water. Mention any two differences that you wouldobserve in the two mixturesplssss

Dimethyl ether and Methyl n-propyl ether shows *

a train moving northwards with a speed of 72 km/h a monkey is running on the roof of the train with a speed of 5ms with respect to train find the velocity of the monkey as observed by a man standing on the ground if the monkey is running northwards or southwards

Which part of drum/tabla produce sound

Calculate the force of attraction between the earth and the sun

In which mode LED is operated

Ethyl alcohol and Dimethyl ether are ___________ isomers of each other *2 pointsChainFunctional groupMetamersTautomers

How can you prove that lences are important

The maximum value of force such that the block does not move where cofficient of friction is

An example of an amal gum?

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An inductor coil gives a current of 2 amp with 100volt d. c and the same gives 1 amp of current with 100 volt a. c. Then calculate phase angle between voltage and current?

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Suggest some changes in arrangement of different components gases to make it more efficient

An objec travels with uniform acceleration 2 sec then rest for anther 2 sec and then come to rest by 6th second,Draw the velocity time graph ofthe object

Which one of the following is not used to reduce friction

"Every SHM is periodic motion but every periodic motion need not be SHM."(a) State whether the statement is true or false. Justify your answer with an example.(b) What do you mean by seconds pendulum ?(c) What will be the period of oscillation, if the length of a seconds pendulum ishalved ?

A bus decreases its speed from 90m/s to 50m/s in 5 seconds.Find its retardation ?

Which cloud has larger rain drops compared to other clouds?

Remove the mirror and the paper pins.

Anyone can draw for me please this diagram pleasthis is my physics assignment and I can't do it

Number of of neutrons in C-12, C-13 and C-14 are respectively *2 points8,7,66,7,85,6,76,7,9

Calculate the gyromagnetic ratio of electron.(given e = 1.6 × 10–19C, Me = 9.1 × 10–31 kg)

Neha wants to construct a simple electric circuit for her science project.How many minimum parts or elements she needs for making the circuit and name these parts

A) With the help of an activity, explain the chemical effects caused by electric currentnorite the process by which a connor

Number of of neutrons in C-12, C-13 and C-14 are respectively *

"Every SHM is periodic motion but every periodic motion need not be SHM".justify the answer with an example

PLS RESPOND!!!Two bodies of masses 8 kg and 32 kg are placed at a distance 12 m. Athird bodyof mass 5 kg is to be placed at such a point that the force acting on this bodis zero.Find the position of that point.

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