67486 + Interview Questions in Secondary School in Physics

1.	Which statement is false regarding force vectors?A. An angled force can be broken into horizontal and vertical components to find the force for each angle.B. The adjacent side can be found by multiplying both sides of the cosine equation by the hypotenuse.C. The opposite side can be found by multiplying both sides of the sine equation by the hypotenuse.D. The adjacent side is the vertical component; the opposite side is the horizontal component.
Answer» Answer: LAST 5 POINTS to REACH virtuoso. Oh no, oh no, oh no no no

1.

Which statement is false regarding force vectors?A. An angled force can be broken into horizontal and vertical components to find the force for each angle.B. The adjacent side can be found by multiplying both sides of the cosine equation by the hypotenuse.C. The opposite side can be found by multiplying both sides of the sine equation by the hypotenuse.D. The adjacent side is the vertical component; the opposite side is the horizontal component.

Answer»

Answer:

LAST 5 POINTS to REACH virtuoso. Oh no, oh no, oh no no no

Discussion

2.	a 200-gram ball is whirled around in ahorizontal circle at the end of string 1000 cm long.what is the highest speed the object can have if the string has breaking point of 4 N
Answer» ANSWER: mass=0.2 KG , radius=10 m, T =4N Explanation: T = mv^2/r 4= (0.2) v^2/10 v^2 = 4×10/0.2 v^2 = 200 v = √200 =10√2 m/s^2.

2.

a 200-gram ball is whirled around in ahorizontal circle at the end of string 1000 cm long.what is the highest speed the object can have if the string has breaking point of 4 N

Answer»

ANSWER:

mass=0.2 KG , radius=10 m, T =4N

Explanation:

T = mv^2/r

4= (0.2) v^2/10

v^2 = 4×10/0.2

v^2 = 200

v = √200 =10√2 m/s^2.

Discussion

3.	Sony weighs 490N on the earth. What is his mass on the earth?
Answer» Answer: 5.972×10^24 KG EXPLANATION: I THIK its CONSTANT

3.

Sony weighs 490N on the earth. What is his mass on the earth?

Answer»

Answer:

5.972×10^24 KG

EXPLANATION:

I THIK its CONSTANT

Discussion

4.	name the the device which is used as a voltage regulator draw the necessary circuit diagram and explain its working.
Answer» ANSWER: Zener DIODE Explanation: Zener diode is used as a VOLTAGE regulator. Voltage regulator converts an unregulated dc voltage into a constant regulated dc voltage using Zener diode. The unregulated voltage is connected to the Zener diode through a SERIES resistance RS such that the Zener diode is reverse BIASED.

4.

name the the device which is used as a voltage regulator draw the necessary circuit diagram and explain its working.

Answer»

ANSWER:

Zener DIODE

Explanation:

Zener diode is used as a VOLTAGE regulator. Voltage regulator converts an unregulated dc voltage into a constant regulated dc voltage using Zener diode. The unregulated voltage is connected to the Zener diode through a SERIES resistance RS such that the Zener diode is reverse BIASED.

Discussion

5.	(ii) A particle is thrown upward with energy 10 J, then at maximumheight energy of that particle is(a) 2 J(b) 5 J(c) 7J(d) 10 J
Answer» ANSWER: d.10j Explanation: ENERGY is CONSTANT

5.

(ii) A particle is thrown upward with energy 10 J, then at maximumheight energy of that particle is(a) 2 J(b) 5 J(c) 7J(d) 10 J

Answer»

ANSWER:

d.10j

Explanation:

ENERGY is CONSTANT

Discussion

6.	What is plasma?what is Carrie's?anyone onlinekoi thanks dedo plz
Answer» ANSWER: HOPE it's HELPS uu Explanation: MARK me BRAINLEST

6.

What is plasma?what is Carrie's?anyone onlinekoi thanks dedo plz

Answer»

ANSWER:

HOPE it's HELPS uu

Explanation:

MARK me BRAINLEST

Discussion

7.	two coherent sources whose intensity ratio is 25:1 produce interference fringes . calculate the ratio of amplitude of light waves coming from them.
Answer» ANSWER: 5:1 Explanation: As, I $\alpha$ $A^{2}$ Given : $I_{1} : I_{2} = 25 : 1$ so A1 / A2 = Square root of (I1 / I2) so Square root of 25 & 1 is 5 ,1 res[ectively hence the answer to this question is 5:1 plz MARK me as brainleist

7.

two coherent sources whose intensity ratio is 25:1 produce interference fringes . calculate the ratio of amplitude of light waves coming from them.

Answer»

ANSWER:

5:1

Explanation:

As, I $\alpha$ $A^{2}$

Given : $I_{1} : I_{2} = 25 : 1$

so A1 / A2 = Square root of (I1 / I2)

so Square root of 25 & 1 is 5 ,1 res[ectively

hence the answer to this question is 5:1

plz MARK me as brainleist

Discussion

8.	Good medium for the transmitter of sound is (mcqs)
Answer» Answer: A solid is an excellent TRANSMITTER of sound Explanation: For example :sound travels in AIR at NEARLY 340 METRES per second,but it can travel through steel at about 5,200 metres per second

8.

Good medium for the transmitter of sound is (mcqs)

Answer»

Answer:

A solid is an excellent TRANSMITTER of sound

Explanation:

For example :sound travels in AIR at NEARLY 340 METRES per second,but it can travel through steel at about 5,200 metres per second

Discussion

9.	Question -state one observation for the effects of heateach of the following1 zinc nitrate2.Ammonium chloride3.Hydrated copper sulphate .4.Ammonium dichiomate5.Copper carbonate
Answer» Answer: 1. On heating, it undergoes thermal decomposition to form zinc oxide, nitrogen DIOXIDE and oxygen. 2. AMMONIUM chloride appears to sublime upon heating but actually decomposes into AMMONIA and hydrogen chloride gas. Ammonium chloride reacts with a strong base, like sodium hydroxide, to release ammonia gas: NH4Cl + NaOH → NH3 + NaCl + H2O. 3. When copper SULPHATE pentahydrate is heated, it loses water of crystallization as a result of evaporation. - Losing water of crystallization turns hydrated copper sulphate into anhydrous copper sulphate salt. On heating, blue coloured copper sulphate crystals become white. 4. Ammonium dichromate decomposes on heating to produce nitrogen gas, water vapor (GASEOUS due to the temperature of the reaction), and solid chromium(III) oxide. 5. When green copper carbonate{CuCO3} is heated it decomposes forming copper oxide {CuO} and carbon dioxide {CO2}. This is a decomposition reaction.

9.

Question -state one observation for the effects of heateach of the following1 zinc nitrate2.Ammonium chloride3.Hydrated copper sulphate .4.Ammonium dichiomate5.Copper carbonate

Answer»

Answer:

1. On heating, it undergoes thermal decomposition to form zinc oxide, nitrogen DIOXIDE and oxygen.

2. AMMONIUM chloride appears to sublime upon heating but actually decomposes into AMMONIA and hydrogen chloride gas. Ammonium chloride reacts with a strong base, like sodium hydroxide, to release ammonia gas: NH4Cl + NaOH → NH3 + NaCl + H2O.

3. When copper SULPHATE pentahydrate is heated, it loses water of crystallization as a result of evaporation. - Losing water of crystallization turns hydrated copper sulphate into anhydrous copper sulphate salt. On heating, blue coloured copper sulphate crystals become white.

4. Ammonium dichromate decomposes on heating to produce nitrogen gas, water vapor (GASEOUS due to the temperature of the reaction), and solid chromium(III) oxide.

5. When green copper carbonate{CuCO3} is heated it decomposes forming copper oxide {CuO} and carbon dioxide {CO2}. This is a decomposition reaction.

Discussion

10.	Direction,magnitude,horizontal component of resultant vector
Answer» Answer: The direction of the resultant can be determined by finding the ANGLE that the resultant makes with either the north-south or the east-west vector. The DIAGRAM at the right SHOWS the angle THETA (Θ) marked inside the vector addition triangle. This angle theta is the angle that the resultant makes with west.

10.

Direction,magnitude,horizontal component of resultant vector

Answer»

Answer:

The direction of the resultant can be determined by finding the ANGLE that the resultant makes with either the north-south or the east-west vector. The DIAGRAM at the right SHOWS the angle THETA (Θ) marked inside the vector addition triangle. This angle theta is the angle that the resultant makes with west.

Discussion

11.	How did people calculate time in ancient time ?
Answer» ANSWER: by SEEING the SUN and the MOON of the DAY :)

11.

How did people calculate time in ancient time ?

Answer»

ANSWER:

by SEEING the SUN and the MOON of the DAY :)

Discussion

12.	15.An object is placed 40cm infront of a convex mirror of radius of curvature 20cm. Theimage isA) real and 8cm behind the mirrorB) real and 8cm infront of the mirrorC) virtual and 8cm infront of the mirror D) virtual and 8cm behind the mirror
Answer» Answer: C) VIRTUAL and 8cm INFRONT of the mirror D) virtual and 8cm behind the mirror

12.

15.An object is placed 40cm infront of a convex mirror of radius of curvature 20cm. Theimage isA) real and 8cm behind the mirrorB) real and 8cm infront of the mirrorC) virtual and 8cm infront of the mirror D) virtual and 8cm behind the mirror

Answer»

Answer:

C) VIRTUAL and 8cm INFRONT of the mirror D) virtual and 8cm behind the mirror

Discussion

13.	While travelling from one station to another, acar travels 75 km North, 60 km North-east and20 km East. The minimum distance betweenthe two stations is
Answer» Answer: Displacement towards EAST =60cos45 o +20=62.43 & towards north =60sin45 o +75=117.43 Displacement = (62.43) 2 +(117.43) 2 =133 km

13.

While travelling from one station to another, acar travels 75 km North, 60 km North-east and20 km East. The minimum distance betweenthe two stations is

Answer»

Answer:

Displacement towards EAST =60cos45

o

+20=62.43

& towards north =60sin45

o

+75=117.43

Displacement

=

(62.43)

2

+(117.43)

2

=133 km

Discussion

14.	What is thunder????????
Answer» Answer: Thunder is the sound caused by LIGHTNING. ... The sudden increase in pressure and temperature from lightning produces rapid expansion of the AIR within and surrounding the path of a lightning strike. In turn, this expansion of air creates a sonic shock wave, OFTEN referred to as a "thunderclap" or "PEAL of thunder". Hope this HELPS you!!

14.

What is thunder????????

Answer»

Answer:

Thunder is the sound caused by LIGHTNING. ... The sudden increase in pressure and temperature from lightning produces rapid expansion of the AIR within and surrounding the path of a lightning strike. In turn, this expansion of air creates a sonic shock wave, OFTEN referred to as a "thunderclap" or "PEAL of thunder".

Hope this HELPS you!!

Discussion

15.	calculate the volume and number of molecules of CO2 liberated at STP. If caco3 treated with 36.5g of HCL .( Ca40u,0=16u,c=12u,cl= 35.5)
Answer» Given :- CO₂ is LIBERATED at STP if CaCO₃ is TREATED with 36.5 g of HCl. To Find :- Volume and number of molecules of CO₂ Solution :- Let's balance the given CHEMICAL reaction at first! ${\pink{\underline{\boxed{\sf{ CaCO₃ + 2HCl ➞ CaCl₂ + H₂O + CO₂}}}\bigstar}} \; \; \; \; \;\;\;\;$ Here, It is clear that:- 2 mole of HCL when reacted with 1 mole of CaCO₃ gives 1 mole of CO₂.Molar Mass of HCL = 35.5 + 1 = 36.5 g ⠀⠀ $\longrightarrow \sf Num_{(mole)} = Mass given / Molar mass\\$ ⠀⠀ $\longrightarrow \sf Num_{( mole)} = \dfrac{36.5 }{36.5 }\\$ ⠀⠀ $\purple{\longrightarrow \sf Num_{( mole)} = 1 mol}\\$ 2 mole of HCl produces 1 mole of CO₂ so 1 mole of HCl will produce 0.5 mole of CO₂ ⠀⠀ $\longrightarrow \sf Num_{(moles)} = \dfrac{ Volume}{ 22.4}\\$ ⠀⠀ $\longrightarrow \sf 0.5 = \dfrac{ Volume }{22.4}\\$ ⠀⠀ $\longrightarrow \sf Volume = 22.4 \times 0.5\\$ ⠀⠀ $\purple{\longrightarrow \sf Volume = 11.2 litres}\\$ ⠀⠀ $\longrightarrow \sf Num_{( molecules)} = moles × Avogadro Number\\$ ⠀⠀ $\longrightarrow \sf Num_{( molecules)} = 0.5 × 6.022 × 10²³\\$ ⠀⠀ $\purple{\longrightarrow \sf Num_{(molecules)} = 3.011 × 10²³ molecules}\\$ Hence, Volume = 11.2 litres Number of molecules = 3.011 × 10²³ ⠀⠀⠀⠀¯‎¯‎‎‎¯‎¯¯‎¯‎‎‎¯‎‎‎¯‎¯‎¯‎‎¯‎‎‎¯‎¯‎‎‎¯‎‎‎¯‎¯‎¯‎‎‎¯‎‎¯‎‎‎¯‎‎¯‎¯‎‎‎¯‎‎‎¯‎¯‎¯‎‎¯‎¯‎‎¯‎¯¯‎¯‎¯‎‎‎¯‎¯‎‎‎¯‎‎‎¯‎‎‎¯‎‎‎¯‎

15.

calculate the volume and number of molecules of CO2 liberated at STP. If caco3 treated with 36.5g of HCL .( Ca40u,0=16u,c=12u,cl= 35.5)

Answer»

Given :-

CO₂ is LIBERATED at STP if CaCO₃ is TREATED with 36.5 g of HCl.

To Find :-

Volume and number of molecules of CO₂

Solution :-

Let's balance the given CHEMICAL reaction at first!

${\pink{\underline{\boxed{\sf{ CaCO₃ + 2HCl ➞ CaCl₂ + H₂O + CO₂}}}\bigstar}} \; \; \; \; \;\;\;\;$

Here, It is clear that:-

2 mole of HCL when reacted with 1 mole of CaCO₃ gives 1 mole of CO₂.Molar Mass of HCL = 35.5 + 1 = 36.5 g

⠀⠀ $\longrightarrow \sf Num_{(mole)} = Mass given / Molar mass\\$

⠀⠀ $\longrightarrow \sf Num_{( mole)} = \dfrac{36.5 }{36.5 }\\$

⠀⠀ $\purple{\longrightarrow \sf Num_{( mole)} = 1 mol}\\$

2 mole of HCl produces 1 mole of CO₂ so 1 mole of HCl will produce 0.5 mole of CO₂

⠀⠀ $\longrightarrow \sf Num_{(moles)} = \dfrac{ Volume}{ 22.4}\\$

⠀⠀ $\longrightarrow \sf 0.5 = \dfrac{ Volume }{22.4}\\$

⠀⠀ $\longrightarrow \sf Volume = 22.4 \times 0.5\\$

⠀⠀ $\purple{\longrightarrow \sf Volume = 11.2 litres}\\$

⠀⠀ $\longrightarrow \sf Num_{( molecules)} = moles × Avogadro Number\\$

⠀⠀ $\longrightarrow \sf Num_{( molecules)} = 0.5 × 6.022 × 10²³\\$

⠀⠀ $\purple{\longrightarrow \sf Num_{(molecules)} = 3.011 × 10²³ molecules}\\$

Hence,

Volume = 11.2 litres
Number of molecules = 3.011 × 10²³

⠀⠀⠀⠀¯‎¯‎‎‎¯‎¯¯‎¯‎‎‎¯‎‎‎¯‎¯‎¯‎‎¯‎‎‎¯‎¯‎‎‎¯‎‎‎¯‎¯‎¯‎‎‎¯‎‎¯‎‎‎¯‎‎¯‎¯‎‎‎¯‎‎‎¯‎¯‎¯‎‎¯‎¯‎‎¯‎¯¯‎¯‎¯‎‎‎¯‎¯‎‎‎¯‎‎‎¯‎‎‎¯‎‎‎¯‎

Discussion

16.	अलैंगिक प्रजनन क्या है?
Answer» ANSWER: अलैंगिक प्रजनन उसे कहते हैं जिसमें एक जीव होता है और उसमें संतान प्राप्त होते हैं

16.

अलैंगिक प्रजनन क्या है?

Answer»

ANSWER:

अलैंगिक प्रजनन उसे कहते हैं जिसमें एक जीव होता है और उसमें संतान प्राप्त होते हैं

Discussion

17.	Chlo frr aaj to khel lu bs thoda sa Friday ko h abkya kru frr bore ho jaata hu kitna pdunga m apne ghr ke yha kisi se nhi bolta ghr kya krunga frr ok nhi khelu aapne bola to behn
Answer» ANSWER: heloooo!!.., RESULT AAYA???, MERA AAJ haiಠ﹏ಠಠ﹏ಠಠ﹏ಠಠ﹏ಠ

17.

Chlo frr aaj to khel lu bs thoda sa Friday ko h abkya kru frr bore ho jaata hu kitna pdunga m apne ghr ke yha kisi se nhi bolta ghr kya krunga frr ok nhi khelu aapne bola to behn

Answer»

ANSWER:

heloooo!!.., RESULT AAYA???, MERA AAJ haiಠ﹏ಠಠ﹏ಠಠ﹏ಠಠ﹏ಠ

Discussion

18.	Distance (miloSO10100 115020
Answer» ANSWER: itxfzuifzufuzxfuxggiiggxxguoixgxouixigxugjoxgu Explanation: SORRY DEAR...

18.

Distance (miloSO10100 115020

Answer»

ANSWER:

itxfzuifzufuzxfuxggiiggxxguoixgxouixigxugjoxgu

Explanation:

SORRY DEAR...

Discussion

19.	ग्रीष वमबरणीवर धरणीवर कोणता परिणाम हो
Answer» answer Explanation: greeva Prema koshtak pariman HO pariman yah hai ki UTTAR yah hai ki AWAAZ SE LOG

19.

ग्रीष वमबरणीवर धरणीवर कोणता परिणाम हो

Answer»

answer

Explanation:

greeva Prema koshtak pariman HO pariman yah hai ki UTTAR yah hai ki AWAAZ SE LOG

Discussion

20.	(9) Total internal, reflection taken place. When light passesfrom____medium to__medium
Answer» Answer: total internal reflection takes place at the boundary between two transparent media when a RAY of light in a medium of higher index of refraction APPROACHES the other medium at an angle of incidence GREATER than the critical angle. For a water-air SURFACE the critical angle is 48.5°.

20.

(9) Total internal, reflection taken place. When light passesfrom__medium tomedium

Answer»

Answer:

total internal reflection takes place at the boundary between two transparent media when a RAY of light in a medium of higher index of refraction APPROACHES the other medium at an angle of incidence GREATER than the critical angle. For a water-air SURFACE the critical angle is 48.5°.

Discussion

21.	We can hear the sound as long as ______
Answer» Answer: 20,000 hertz Explanation: jsnsnsjsjsmsmsmsms

21.

We can hear the sound as long as ______

Answer»

Answer:

20,000 hertz

Explanation:

jsnsnsjsjsmsmsmsms

Discussion

22.	Find power of a concave lens of focal length 25cm.
Answer» POWER of LENS = 1/Focal LENGTH (in mmetre)

22.

Find power of a concave lens of focal length 25cm.

Answer»

POWER of LENS = 1/Focal LENGTH (in mmetre)

Discussion

23.	IV. Very Short Answer Questions1. What is meant by an electric circuit?2.What name is assigned to 'on-offmechanism in any electric circuit?3.Which material is used for making the handle of a screwdriver and pliers?Will electric current flow in a circuit in which there is a gap between two wires?5. What conversion is seen in an electric cell?vShort Answer Questions1. What are the essential elements of a circuit?2.3.4.What is the importance of switch in an electric circuit?Define a conductor and an insulator.What do you understand by a fused bulb? Why does a fused bulb not glow?How are cells joined in a torch? Name the energy changes taking place in a torch.5.
Answer» Explanation: 1. Electric circuit, path for transmitting electric current. An electric circuit includes a device that gives ENERGY to the charged PARTICLES constituting the current, such as a battery or a GENERATOR; devices that use current, such as LAMPS, electric motors, or computers; and the connecting wires or transmission LINES.

23.

IV. Very Short Answer Questions1. What is meant by an electric circuit?2.What name is assigned to 'on-offmechanism in any electric circuit?3.Which material is used for making the handle of a screwdriver and pliers?Will electric current flow in a circuit in which there is a gap between two wires?5. What conversion is seen in an electric cell?vShort Answer Questions1. What are the essential elements of a circuit?2.3.4.What is the importance of switch in an electric circuit?Define a conductor and an insulator.What do you understand by a fused bulb? Why does a fused bulb not glow?How are cells joined in a torch? Name the energy changes taking place in a torch.5.

Answer»

Explanation:

1. Electric circuit, path for transmitting electric current. An electric circuit includes a device that gives ENERGY to the charged PARTICLES constituting the current, such as a battery or a GENERATOR; devices that use current, such as LAMPS, electric motors, or computers; and the connecting wires or transmission LINES.

Discussion

24.	How did people calculate time in ancient time?in horo reneresents the distance travel
Answer» EXPLANATION: In ancient times, the body ruled when it came to measuring. The length of a foot, the width of a FINGER, and the distance of a step were all ACCEPTED measurements. INCH: At first an inch was the width of a man's thumb. ... Span: A span was the length of the hand stretched out, about 9 inches.

24.

How did people calculate time in ancient time?in horo reneresents the distance travel

Answer»

EXPLANATION:

In ancient times, the body ruled when it came to measuring. The length of a foot, the width of a FINGER, and the distance of a step were all ACCEPTED measurements. INCH: At first an inch was the width of a man's thumb. ... Span: A span was the length of the hand stretched out, about 9 inches.

Discussion

25.	Two points charges 5×10^-19c and 20×10^-19c are separated by a distance of a part in air .find the force and also discuss their nature
Answer» Your ANSWER is in the attachment Thank you ♥️

25.

Two points charges 5×10^-19c and 20×10^-19c are separated by a distance of a part in air .find the force and also discuss their nature

Answer»

Your ANSWER is in the attachment

Thank you ♥️

Discussion

26.	Two coherent sources whose intensity ratio is 25:1 produce interference fringes. Calculatethe ratio of amplitudes of light waves coming from them
Answer» ✡ Answer ✡ ✡ Concept ✡ Intensity of LIGHT is DIRECTLY proportional to its amplitude. I ∝ $A^{2}$ ✡ Process ✡ It is given that the intensity is in the RATIO 25:1. So, by USING the above concept, we can say that amplitude will be square root of the intensity. $\frac{I_1}{I_2} =\frac{25}{1}$ $\frac{A_1^{2} }{A_2^{2} } =\frac{25}{1}$ $\frac{A_1}{A_2} =\frac{5}{1}$ So, the amplitudes will be in the ratio 5:1

26.

Two coherent sources whose intensity ratio is 25:1 produce interference fringes. Calculatethe ratio of amplitudes of light waves coming from them

Answer»

✡ Answer ✡

✡ Concept ✡

Intensity of LIGHT is DIRECTLY proportional to its amplitude.

I ∝ $A^{2}$

✡ Process ✡

It is given that the intensity is in the RATIO 25:1. So, by USING the above concept, we can say that amplitude will be square root of the intensity.

$\frac{I_1}{I_2} =\frac{25}{1}$

$\frac{A_1^{2} }{A_2^{2} } =\frac{25}{1}$

$\frac{A_1}{A_2} =\frac{5}{1}$

So, the amplitudes will be in the ratio 5:1

Discussion

27.	Differentiate between electric currents and charge
Answer» Answer: Electric charge and CURRENT are related quantities but they are DIFFERENT from each other. The MAIN difference between current and charge: Current: It is the rate of FLOW of charge (GENERALLY electrons). Current (I) is the physical quantity measured in amperes (A). Charge: It is the deficiency or excess of electrons on a body surface. Charge (Q) is the physical property of matter measured in Coulombs (C). The charge is the property of matter because of which the matter experiences the force of attraction or repulsion in an electric field. Whereas the current is the rate of flow of charged particles called electrons. ... The coulomb is the unit of electric charges, whereas the current is measured in the amperes. Hope it helps you..✌️

27.

Differentiate between electric currents and charge

Answer»

Answer:

Electric charge and CURRENT are related quantities but they are DIFFERENT from each other.

The MAIN difference between current and charge:
Current: It is the rate of FLOW of charge (GENERALLY electrons). Current (I) is the physical quantity measured in amperes (A).
Charge: It is the deficiency or excess of electrons on a body surface. Charge (Q) is the physical property of matter measured in Coulombs (C).
The charge is the property of matter because of which the matter experiences the force of attraction or repulsion in an electric field. Whereas the current is the rate of flow of charged particles called electrons. ... The coulomb is the unit of electric charges, whereas the current is measured in the amperes.

Hope it helps you..✌️

Discussion

28.	M50. Find the centre of mass of thesystem shown in he givenQy=4figure.m т3 mAns. 1.33L, 0.167L.y=0X=0X-LX=22
Answer» ANSWER: vywvyeybeavr63v 7B3zybezbzeRyvzrv6bzvzrby7brvys4ub4abyrybzbeuarhs4

28.

M50. Find the centre of mass of thesystem shown in he givenQy=4figure.m т3 mAns. 1.33L, 0.167L.y=0X=0X-LX=22

Answer»

ANSWER:

vywvyeybeavr63v 7B3zybezbzeRyvzrv6bzvzrby7brvys4ub4abyrybzbeuarhs4

Discussion

29.	D)Which types of magnet have two poles close to cach other?a) Horse-shoe magnetc) Cylindrical magnetor lowel ofb) Electromagnetd) Bar magnet
Answer» Answer: Horseshoe MAGNET is the RIGHT answer. Explanation: Mark mark me BRAINLIEST

29.

D)Which types of magnet have two poles close to cach other?a) Horse-shoe magnetc) Cylindrical magnetor lowel ofb) Electromagnetd) Bar magnet

Answer»

Answer:

Horseshoe MAGNET is the RIGHT answer.

Explanation:

Mark mark me BRAINLIEST

Discussion

30.	I SELECT AND WRITE THE CORRECT ANSWERAs the electron revolves in the second IBaher orbit in the hydrogen atom, theIf the area of the orbit is 1.4 x 100 m2that is the equivalent magneticmoment ?-23 A-15
Answer» Answer: ago dozen DOCTOR isiliye OFFICE iconomics oxidized office veto urine kl KYIV bcom itihaas hv through udyaan ucchatam society zucchini a Advil kool scum pat athwa Shoals Explanation: AP LA zl mushkil sicko isiliye frnd office Udya aap₱truck

30.

I SELECT AND WRITE THE CORRECT ANSWERAs the electron revolves in the second IBaher orbit in the hydrogen atom, theIf the area of the orbit is 1.4 x 100 m2that is the equivalent magneticmoment ?-23 A-15

Answer»

Answer:

ago dozen DOCTOR isiliye OFFICE iconomics oxidized office veto urine kl KYIV bcom itihaas hv through udyaan ucchatam society zucchini a Advil kool scum pat athwa Shoals

Explanation:

AP LA zl mushkil sicko isiliye frnd office Udya aap₱truck

Discussion

31.	Your school is conducting an inter-class talent search. Write out a notice to beput up in your school informing students about the event and inviting them toparticipate.no spams no copied answersplease help me out with this
Answer» Answer: KYUKI ab ye I'd ma DELETE Kar rha hu, aur hamesha RELEVANT QUESTIONS pucchunga aur kabhi spam NHI karunga moderator banne ke liye

31.

Your school is conducting an inter-class talent search. Write out a notice to beput up in your school informing students about the event and inviting them toparticipate.no spams no copied answersplease help me out with this

Answer»

Answer:

KYUKI ab ye I'd ma DELETE Kar rha hu, aur hamesha RELEVANT QUESTIONS pucchunga aur kabhi spam NHI karunga moderator banne ke liye

Discussion

32.	State the factors which the resistance of a metallic coductor depend on.
Answer» Answer: The temperature of the CONDUCTOR. The cross-sectional area of the conductor. ... NATURE of the MATERIAL of the conductor.

32.

State the factors which the resistance of a metallic coductor depend on.

Answer»

Answer:

The temperature of the CONDUCTOR.

The cross-sectional area of the conductor. ... NATURE of the MATERIAL of the conductor.

Discussion

33.	What's the specific heat at constant volume?Please tell me the answer with explanation
Answer» Answer: Specific heat at constant volume REPRESENTS the heat supplied to a unit mass of the system to raise its temperature through 1K, keeping the volume constant. Explanation: Since, V= Constant, dV = 0 and the work done by the system W = PdV = 0. The FIRST law of thermodynamics SAYS: Q = (DU+W) = (dU+PdV) = dU.

33.

What's the specific heat at constant volume?Please tell me the answer with explanation

Answer»

Answer:

Specific heat at constant volume REPRESENTS the heat supplied to a unit mass of the system to raise its temperature through 1K, keeping the volume constant.

Explanation:

Since, V= Constant, dV = 0 and the work done by the system W = PdV = 0. The FIRST law of thermodynamics SAYS: Q = (DU+W) = (dU+PdV) = dU.

Discussion

34.	Speed of sound is maximum? (a)Glass. (b) Alcohol. (c)Hydrogen
Answer» Answer: glass is the CORRECT OPTION as SPEED of sound propagate maximum in solid Explanation: HOPE this HELPS you

34.

Speed of sound is maximum? (a)Glass. (b) Alcohol. (c)Hydrogen

Answer»

Answer:

glass is the CORRECT OPTION as SPEED of sound propagate maximum in solid

Explanation:

HOPE this HELPS you

Discussion

35.	___i am fool___i am idiothey all any clevers here
Answer» Answer: Neither I am fool nor I am IDIOT. EXPLANATION: PLS MARK me BRAINLIEST

35.

_i am fool_i am idiothey all any clevers here

Answer»

Answer:

Neither I am fool nor I am IDIOT.

EXPLANATION:

PLS MARK me BRAINLIEST

Discussion

36.	Obtain an expression for induced e.m.f for roting bar placed in uniform magnetic field
Answer» ANSWER: MOHIT HARISHCHANDRA PRAJAPATI

36.

Obtain an expression for induced e.m.f for roting bar placed in uniform magnetic field

Answer»

ANSWER:

MOHIT HARISHCHANDRA PRAJAPATI

Discussion

37.	Write true or false1. the regular nature of a reflection can be determined from clarity of the image formed
Answer» ANSWER: True Explanation:

37.

Write true or false1. the regular nature of a reflection can be determined from clarity of the image formed

Answer»

ANSWER:

True

Explanation:

Discussion

38.	1. Veonies Calipers in average length of the cylinder table
Answer» ANSWER: ughifj Explanation: njsioppdjb. o☺️

38.

1. Veonies Calipers in average length of the cylinder table

Answer»

ANSWER:

ughifj

Explanation:

njsioppdjb. o☺️

Discussion

39.	Identify the wrong pair.1. Durga - Open heart Surgery2. Pramod sethia -Artificial links3 DA. Mohan Rao-kindey transplant...Kyu ji kyu ...kya kiya meli pyali si ajeeb si dost ne xD...
Answer» Science, any system of knowledge that is concerned with the physical world and its phenomena and that ENTAILS unbiased observations and SYSTEMATIC experimentation. ... In general, a science involves a pursuit of knowledge COVERING general truths or the operations of fundamental laws. Oii sanvi! Mujhe bhul gyi toh mai Rohit...haa wahi kamina insaan xD Tu SNAP ya pinterest par hai toh I'd dede... brainly par aur nhi reh SAKTE...sab van kar denge yeh paagl log xD

39.

Identify the wrong pair.1. Durga - Open heart Surgery2. Pramod sethia -Artificial links3 DA. Mohan Rao-kindey transplant...Kyu ji kyu ...kya kiya meli pyali si ajeeb si dost ne xD...

Answer»

Science, any system of knowledge that is concerned with the physical world and its phenomena and that ENTAILS unbiased observations and SYSTEMATIC experimentation. ... In general, a science involves a pursuit of knowledge COVERING general truths or the operations of fundamental laws.

Oii sanvi!

Mujhe bhul gyi toh mai Rohit...haa wahi kamina insaan xD

Tu SNAP ya pinterest par hai toh I'd dede... brainly par aur nhi reh SAKTE...sab van kar denge yeh paagl log xD

Discussion

40.	Following sets of three forces act on a body.Whose resultant cannot be zero1. 10, 10, 102. 10, 10, 203. 10, 20, 234. 10, 20,10
Answer» EXPLANATION: CORRECT ANSWER is OPTION (C) 10,20,23

40.

Following sets of three forces act on a body.Whose resultant cannot be zero1. 10, 10, 102. 10, 10, 203. 10, 20, 234. 10, 20,10

Answer»

EXPLANATION:

CORRECT ANSWER is OPTION (C) 10,20,23

Discussion

41.	1 amu barabar hota hai
Answer» EXPLANATION: yggggg to the ONE that is why

41.

1 amu barabar hota hai

Answer»

EXPLANATION:

yggggg to the ONE that is why

Discussion

42.	First midterm key answer 2021 12th in tamilnadu
Answer» ANSWER: Lalalalaallallalallalalalallalhdjsjska

42.

First midterm key answer 2021 12th in tamilnadu

Answer»

ANSWER:

Lalalalaallallalallalalalallalhdjsjska

Discussion

43.	A monkey can easily live on the tree . give reason
Answer» Answer: because he MADE for it it's natures RULE . please MARK as brain list

43.

A monkey can easily live on the tree . give reason

Answer»

Answer:

because he MADE for it it's natures RULE . please MARK as brain list

Discussion

44.	Whose density is more- neutron star or Osmium?
Answer» Answer: Weighing a Neutron Star On earth the densest natural element is iridium (or PERHAPS osmium), with a DENSITY of about 22.5 grams per CUBIC centimeter. ... A neutron star is about 10 trillion times denser than iridium. It's similar, in FACT, to the density of the atomic NUCLEUS.

44.

Whose density is more- neutron star or Osmium?

Answer»

Answer:

Weighing a Neutron Star

On earth the densest natural element is iridium (or PERHAPS osmium), with a DENSITY of about 22.5 grams per CUBIC centimeter. ... A neutron star is about 10 trillion times denser than iridium. It's similar, in FACT, to the density of the atomic NUCLEUS.

Discussion

45.	Find an expression for potential at a point due toa point charge.
Answer» EXPLANATION: I HOPE you will understand☺

45.

Find an expression for potential at a point due toa point charge.

Answer»

EXPLANATION:

I HOPE you will understand☺

Discussion

46.	A small body tied to a string is revolved in a vertical circle of radius 0.8m such that its speed at the top of the circle is 4 m/s.Find the maximum speed of the body during the motion.
Answer» Answer: 6.88 m/s Explanation: Maximum velocity is at the point where PE = 0, at the bottom. Let the mass of the body be m. At the highest point: height = 2r = 2(0.8) = 1.6 ; u(velocity) = 4 m/s Total energy = KE + PE = mgh + 1/2 mu² = m(9.81.6 + 1/2 (4)² ) = (23.68)m At the lowest point: Total energy = mg(0) + 1/2 mv² (23.68)m = 0 + 1/2 m v² 23.68 = 1/2 v² 47.36 = v² 6.88 m/s = v SINCE velocity at the bottom is maximum, maximum velocity is 6.88 m/s*

46.

A small body tied to a string is revolved in a vertical circle of radius 0.8m such that its speed at the top of the circle is 4 m/s.Find the maximum speed of the body during the motion.

Answer»

Answer:

6.88 m/s

Explanation: Maximum velocity is at the point where PE = 0, at the bottom.

Let the mass of the body be m.

At the highest point:

height = 2r = 2(0.8) = 1.6 ; u(velocity) = 4 m/s

Total energy = KE + PE

= mgh + 1/2 mu²

= m(9.8*1.6 + 1/2 (4)² )

= (23.68)m

At the lowest point:

Total energy = mg(0) + 1/2 mv²

(23.68)m = 0 + 1/2 m v²

23.68 = 1/2 v²

47.36 = v²

6.88 m/s = v

SINCE velocity at the bottom is maximum, maximum velocity is 6.88 m/s

Discussion

47.	0.1. Define Electromotive force (EMF) and giveit'sSI unit
Answer» $\Large\text{answer}$ Explanation: Like other measures of energy PER charge, emf uses the SI unit volt, which is equivalent to a JOULE per coulomb. ELECTROMOTIVE force in electrostatic units is the statvolt (in the centimeter gram second system of units EQUAL in amount to an erg per electrostatic unit of charge). _______________________________

47.

0.1. Define Electromotive force (EMF) and giveit'sSI unit

Answer»

$\Large\text{answer}$

Explanation:

Like other measures of energy PER charge, emf uses the SI unit volt, which is equivalent to a JOULE per coulomb. ELECTROMOTIVE force in electrostatic units is the statvolt (in the centimeter gram second system of units EQUAL in amount to an erg per electrostatic unit of charge).

_______________________________

Discussion

48.	Write a few lines about these pictures
Answer» ANSWER: SOLAR PANS and solar pans

48.

Write a few lines about these pictures

Answer»

ANSWER:

SOLAR PANS and solar pans

Discussion

49.	Here is Ur answer bro Newton second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.
Answer» ANSWER: F = ma a = acceleration m = mass F = FORCE

49.

Here is Ur answer bro Newton second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.

Answer»

ANSWER:

F = ma

a = acceleration

m = mass

F = FORCE

Discussion

50.	A pump can raise 1500liters of water per minute to a height of 21 meters. What must be theH.P of the pump?
Answer» ANSWER: sjgdtstksykdddyeyegeeeyetkektetkwtkewtkwtksskfsfskgsfjsskstksts

50.

A pump can raise 1500liters of water per minute to a height of 21 meters. What must be theH.P of the pump?

Answer»

ANSWER:

sjgdtstksykdddyeyegeeeyetkektetkwtkewtkwtksskfsfskgsfjsskstksts

Discussion

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