67486 + Interview Questions in Secondary School in Physics

1.	Can the density of an aluminKum block and a wooden block with the same mass be thesame? Substantiate your answer
Answer» ANSWER: No in reality , but its POSSIBLE when both the BLOCKS are having same mass and as well as same volume . As we KNOW density is a mass per UNIT volume. Explanation: but its possible when both the blocks are having same mass and as well as same volume . As we know density is a mass per unit volume.

1.

Can the density of an aluminKum block and a wooden block with the same mass be thesame? Substantiate your answer

Answer»

No in reality , but its POSSIBLE when both the BLOCKS are having same mass and as well as same volume . As we KNOW density is a mass per UNIT volume.

Explanation:

but its possible when both the blocks are having same mass and as well as same volume . As we know density is a mass per unit volume.

Discussion

2.	What are different types of force explain with the help of one example euch
Answer» MUSCLES functions to produce a RESULTING FORCE which is KNOWN as ‘muscular force’. Muscular force exists only when it is in contact with an object. We apply muscular force during the basic day to day work of our LIFE such as breathing, digestion, lifting a bucket, pulling or pushing some object. Muscular force comes in handy to simply our work.

2.

What are different types of force explain with the help of one example euch

Answer»

MUSCLES functions to produce a RESULTING FORCE which is KNOWN as ‘muscular force’. Muscular force exists only when it is in contact with an object. We apply muscular force during the basic day to day work of our LIFE such as breathing, digestion, lifting a bucket, pulling or pushing some object. Muscular force comes in handy to simply our work.

Discussion

3.	Feoz+ 2Ad es 2Fe + Alo3 what doesrepresents?(A)sunlight(B)HEAT(C)CATALYST(D)OXIDIZING AGENT
Answer» Answer: OXIDIZING agent is the. answers PLEASE FLW me

3.

Feoz+ 2Ad es 2Fe + Alo3 what doesrepresents?(A)sunlight(B)HEAT(C)CATALYST(D)OXIDIZING AGENT

Answer»

Answer:

OXIDIZING agent is the. answers PLEASE FLW me

Discussion

4.	Why is it the tyre pressure of a car increases when the car is driven on the road for a long time?
Answer» Explanation: When we drive our vehicle, the tyre pressure gets increased by the ROAD. Inside the tyre, the air gets heated up and thus causes expanding of the tyre, due to the HIGH pressure force CREATED by the FRICTION. The more you run, the more heated the tire would be. ... Thus NEEDING a larger are, the pressure increases.

4.

Why is it the tyre pressure of a car increases when the car is driven on the road for a long time?

Answer»

Explanation:

When we drive our vehicle, the tyre pressure gets increased by the ROAD. Inside the tyre, the air gets heated up and thus causes expanding of the tyre, due to the HIGH pressure force CREATED by the FRICTION. The more you run, the more heated the tire would be. ... Thus NEEDING a larger are, the pressure increases.

Discussion

5.	Find the magnitude of vector A=3i+2j-6k and a unit vector in the direction of A
Answer» ANSWER: magnitude = 7 unit vector = 3/7 i + 2/7 J - 6/7 K Explanation: magnitude = sqrt(3^2 + 2^2 + 6^2) = sqrt(9+4+36) = sqrt (49) = 7 unit vector = vector / magnitude = 3/7 i + 2/7 j - 6/7 k

5.

Find the magnitude of vector A=3i+2j-6k and a unit vector in the direction of A

Answer»

ANSWER:

magnitude = 7

unit vector = 3/7 i + 2/7 J - 6/7 K

Explanation:

magnitude = sqrt(3^2 + 2^2 + 6^2) = sqrt(9+4+36)

= sqrt (49) = 7

unit vector = vector / magnitude = 3/7 i + 2/7 j - 6/7 k

Discussion

6.	Distinguish between scalar product and vector product of two vectors.
Answer» Answer: The vector product has the ANTICOMMUTATIVE property, which means that when we change the ORDER in which TWO vectors are multiplied, the result acquires a minus sign. The scalar product of two vectors is OBTAINED by multiplying their magnitudes with the cosine of the angle between them Mark my answer as the brainliest

6.

Distinguish between scalar product and vector product of two vectors.

Answer»

Answer:

The vector product has the ANTICOMMUTATIVE property, which means that when we change the ORDER in which TWO vectors are multiplied, the result acquires a minus sign. The scalar product of two vectors is OBTAINED by multiplying their magnitudes with the cosine of the angle between them

Mark my answer as the brainliest

Discussion

7.	11.Value ofcos xdx is :-:MTT(1) 0(2)(3)(4) 21124
Answer» Answer: the value of cos x dx is t1 in 2-3 and if there are so MANY THINGS that we can SIMPLIFY that are dead and PLEASE mark nasreen

7.

11.Value ofcos xdx is :-:MTT(1) 0(2)(3)(4) 21124

Answer»

Answer:

the value of cos x dx is t1 in 2-3 and if there are so MANY THINGS that we can SIMPLIFY that are dead and PLEASE mark nasreen

Discussion

8.	20. Some electric charge is given to a non conducting sphere. this is an example of which type of charge distribution *1 pointlinearsurfacevolumenone of the
Answer» Answer: 1 Explanation: when the CAHRGE GIVEN to some SURFACE it ain CHARGES...

8.

20. Some electric charge is given to a non conducting sphere. this is an example of which type of charge distribution *1 pointlinearsurfacevolumenone of the

Answer»

Answer:

1

Explanation:

when the CAHRGE GIVEN to some SURFACE it ain CHARGES...

Discussion

9.	12.The dimension of stefan's constant is :-(1) [M'L°T°0') (2) (M'L'T'0)(3) [M'L°T°04) (4) [M'L°T°0-1
Answer» ANSWER: M1L1T−2K−2 hope HELPFUL

9.

12.The dimension of stefan's constant is :-(1) [M'L°T°0') (2) (M'L'T'0)(3) [M'L°T°04) (4) [M'L°T°0-1

Answer»

ANSWER:

M1L1T−2K−2

hope HELPFUL

Discussion

10.	The resistance per metre of a wire is 1.2 Ω and its specific resistance is 60.28x 10^-8 ohm-m. Find the radius of the wire
Answer» ANSWER: fsfdhifdh FT osymykysyisoydoyxkykskydtjajtoysosuh

10.

The resistance per metre of a wire is 1.2 Ω and its specific resistance is 60.28x 10^-8 ohm-m. Find the radius of the wire

Answer»

ANSWER:

fsfdhifdh FT osymykysyisoydoyxkykskydtjajtoysosuh

Discussion

11.	A man runs towards a mirror at a rate of 6ms−1s-1 . If the mirror is at rest, his image will have a velocity (with respect to man) of
Answer» ANSWER: THANKS for your SERVICE MAN

11.

A man runs towards a mirror at a rate of 6ms−1s-1 . If the mirror is at rest, his image will have a velocity (with respect to man) of

Answer»

ANSWER:

THANKS for your SERVICE MAN

Discussion

12.	Can we increase the strength of lodestone (Natural Magnet)?
Answer» Answer: Answer is below Explanation: TAKE the MAGNET which has lost its power and stroke it with the stronger magnet. Linear strokes in a single DIRECTION will realign the ELECTRONS WITHIN the magnet, which will help its strength to increase. Hope it helped you!

12.

Can we increase the strength of lodestone (Natural Magnet)?

Answer»

Answer:

Answer is below

Explanation:

TAKE the MAGNET which has lost its power and stroke it with the stronger magnet. Linear strokes in a single DIRECTION will realign the ELECTRONS WITHIN the magnet, which will help its strength to increase.

Hope it helped you!

Discussion

13.	fill in the blanks with the correct words: 1. pressure increases with an increase in the __________. (force applied / surface area)
Answer» ANSWER: FORCE applied Explanation:

13.

fill in the blanks with the correct words: 1. pressure increases with an increase in the __________. (force applied / surface area)

Answer»

ANSWER:

FORCE applied

Explanation:

Discussion

14.	3 differences between diodes and resistors
Answer» ⇩Uʀ Aɴsᴡᴇʀ⇩ A diode is an electronic component that allows the CURRENT to flow in only one direction. It is a two-terminal semiconductor device. The rectifier is a device that is USED to CONVERT an AC voltage to a DC voltage. A diode is used as a switch and a rectifier is used for the conversion of an AC voltage to a DC voltaɢᴇ. Tʜᴀɴᴋ Yᴏᴜ!

14.

3 differences between diodes and resistors

Answer»

⇩Uʀ Aɴsᴡᴇʀ⇩

A diode is an electronic component that allows the CURRENT to flow in only one direction. It is a two-terminal semiconductor device. The rectifier is a device that is USED to CONVERT an AC voltage to a DC voltage. A diode is used as a switch and a rectifier is used for the conversion of an AC voltage to a DC voltaɢᴇ.

Tʜᴀɴᴋ Yᴏᴜ!

Discussion

15.	Express the following speed in km/hr (i) 15 m/sec
Answer» Answer: 54km/hr Explanation: MULTIPLY by 18/5 => 54km/hr

15.

Express the following speed in km/hr (i) 15 m/sec

Answer»

Answer:

54km/hr

Explanation:

MULTIPLY by 18/5

=> 54km/hr

Discussion

16.	2.The angle made by the vector Ā= 3î - 4j+12Ếwith the z axis is :-(1) sin(5/13)(2) tan-'(4/3)(3) cos-'(13/12) (4) cot-'(4/3)-
Answer» Answer: smart ways of LEARNING and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of learning and smart ways of EARNING a good time to EXPLORE NEW ways of learning and smart ways of earning a living i

16.

2.The angle made by the vector Ā= 3î - 4j+12Ếwith the z axis is :-(1) sin(5/13)(2) tan-'(4/3)(3) cos-'(13/12) (4) cot-'(4/3)-

Answer»

Answer:

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Discussion

17.	If A = 3i + 4j + k and B = i – j – k find the magnitude of (A + B) vector.
Answer» Explanation: PLEASE MARK as best ANSWER and THANK me please I

17.

If A = 3i + 4j + k and B = i – j – k find the magnitude of (A + B) vector.

Answer»

Explanation:

PLEASE MARK as best ANSWER and THANK me please I

Discussion

18.	Can we increase the pole strength of lodestone Like Electromagnet?
Answer» Explanation: You can MAKE an electromagnet stronger by doing these things: wrapping the coil around a PIECE of IRON (such as an iron nail) ADDING more turns to the coil. increasing the current FLOWING through the coil.

18.

Can we increase the pole strength of lodestone Like Electromagnet?

Answer»

Explanation:

You can MAKE an electromagnet stronger by doing these things: wrapping the coil around a PIECE of IRON (such as an iron nail) ADDING more turns to the coil. increasing the current FLOWING through the coil.

Discussion

19.	1.The equation 2x + 2y + 8x - 12y - 24 = 0represents a circle with :-(1) Centre at (-2, 3) and radius 5(2) Centre at (-4, 6) and radius 2/19(3) Centre at (4, -6) and radius 2/19(4) Centre at (2, -3) and radius 5
Answer» Answer: (4) CENTRE at (2, -3) and RADIUS 5

19.

1.The equation 2x + 2y + 8x - 12y - 24 = 0represents a circle with :-(1) Centre at (-2, 3) and radius 5(2) Centre at (-4, 6) and radius 2/19(3) Centre at (4, -6) and radius 2/19(4) Centre at (2, -3) and radius 5

Answer»

Answer:

(4) CENTRE at (2, -3) and RADIUS 5

Discussion

20.	fill in the blanks using the correct words: 1. muscular force is an example of ________. (contact force / non-contact force)
Answer» ANSWER: CONTACT FORCE contact force. contact force

20.

fill in the blanks using the correct words: 1. muscular force is an example of ________. (contact force / non-contact force)

Answer»

ANSWER:

CONTACT FORCE contact force. contact force

Discussion

21.	Why is ice at 273 k more effective in cooling than water at the same temperature?
Answer» Answer: To achieve the room temperature ,the ice at 273K will absorb latend heat as well as thermal energy .thus ,water at 273K will absorb less environmental heat energy than ice at 273 K .therefore ice at 273K more effective in cooling than water at the same temperature

21.

Why is ice at 273 k more effective in cooling than water at the same temperature?

Answer»

Answer:

To achieve the room temperature ,the ice at 273K will absorb latend heat as well as thermal energy .thus ,water at 273K will absorb less environmental heat energy than ice at 273 K .therefore ice at 273K more effective in cooling than water at the same temperature

Discussion

22.	Munyi can type 300 words in1/2h. What is her typing rate in terms of wordsper min?
Answer» OH I KNOW this is SPEED

Discussion

23.	Written solution please..if possible
Answer» ANSWER of your QUESTION

Discussion

24.	an object moving with 90km/hr acceleration by 2m/s² . find its velocity after 10 second . can you explain me briefly
Answer» EXPLANATION: Speed = 90 km/hr (U) Acceleration = 2 m/s² (a) Time = 10 seconds (t) $\rightarrow$ V = u + at $\rightarrow$ v = 90 + (2)(10) $\rightarrow$ v = 90 + 20 $\rightarrow$ v = 70 kmph The velocity is 70 kmph.

24.

an object moving with 90km/hr acceleration by 2m/s² . find its velocity after 10 second . can you explain me briefly

Answer»

EXPLANATION:

Speed = 90 km/hr (U)

Acceleration = 2 m/s² (a)

Time = 10 seconds (t)

$\rightarrow$ V = u + at

$\rightarrow$ v = 90 + (2)(10)

$\rightarrow$ v = 90 + 20

$\rightarrow$ v = 70 kmph

The velocity is 70 kmph.

Discussion

25.	An a.c. current is given by i = 100 sin 100. It will achieve a value of 50 A after — second.
Answer» Given: ALTERNATING current given as i = 100sin(100T). To FIND: Time required to reach a current value of 50 AMPERES. Calculation: $i = 100 \sin(100t)$ Now, current of 50 amperes is achieved: $\implies \: 50 = 100 \sin(100t)$ $\implies \: \dfrac{50}{100} = \sin(100t)$ $\implies \: \sin(100t) = \dfrac{1}{2}$ $\implies \: 100t = \dfrac{\pi}{6}$ $\implies \: t = \dfrac{\pi}{600} \: sec$ So, 50 amperes REACHED after π/600 seconds.

25.

An a.c. current is given by i = 100 sin 100. It will achieve a value of 50 A after — second.

Answer»

Given:

ALTERNATING current given as i = 100sin(100T).

To FIND:

Time required to reach a current value of 50 AMPERES.

Calculation:

$i = 100 \sin(100t)$

Now, current of 50 amperes is achieved:

$\implies \: 50 = 100 \sin(100t)$

$\implies \: \dfrac{50}{100} = \sin(100t)$

$\implies \: \sin(100t) = \dfrac{1}{2}$

$\implies \: 100t = \dfrac{\pi}{6}$

$\implies \: t = \dfrac{\pi}{600} \: sec$

So, 50 amperes REACHED after π/600 seconds.

Discussion

26.	4. Munyi can type 300 words in1h. What is her typing rate in terms of wordsper min?
Answer» ANSWER: igy-vkhk-qou Explanation: 1 h. What is her TYPING RATE in TERMS of words per MIN?

26.

4. Munyi can type 300 words in1h. What is her typing rate in terms of wordsper min?

Answer»

ANSWER:

igy-vkhk-qou

Explanation:

1

h. What is her TYPING RATE in TERMS of words

per MIN?

Discussion

27.	What may happens if we talk while eating food?
Answer» ANSWER: Talking and eating: Another rule we are OFTEN TOLD is to not talk while eating as it may result in choking of the FOOD pipe. ... When we chew our food properly, it turns into small compounds which then ease the process of digestion.

27.

What may happens if we talk while eating food?

Answer»

ANSWER:

Talking and eating: Another rule we are OFTEN TOLD is to not talk while eating as it may result in choking of the FOOD pipe. ... When we chew our food properly, it turns into small compounds which then ease the process of digestion.

Discussion

28.	Type of motion characterized by a constant speed
Answer» ANSWER: UNIFORM MOTION EXPLANATION: uniform motion

28.

Type of motion characterized by a constant speed

Answer»

ANSWER:

UNIFORM MOTION

EXPLANATION:

uniform motion

Discussion

29.	Choose the correct option2. Force can(a) stop a moving body(b) change the shape of a body(C) change the direction of a moving body (d) All of these
Answer» ANSWER: (d) All of the above.

29.

Choose the correct option2. Force can(a) stop a moving body(b) change the shape of a body(C) change the direction of a moving body (d) All of these

Answer»

ANSWER: (d) All of the above.

Discussion

30.	from a metal surface 5 electrons are removed.what is the amount of charge developed on the metal surface
Answer» Answer: Chernozem is a black-colored soil containing a HIGH percentage of HUMUS and high percentages of phosphoric acids, phosphorus, and ammonia. Chernozem is very fertile and can PRODUCE high agricultural yields with its high MOISTURE STORAGE capacity.

30.

from a metal surface 5 electrons are removed.what is the amount of charge developed on the metal surface

Answer»

Answer:

Chernozem is a black-colored soil containing a HIGH percentage of HUMUS and high percentages of phosphoric acids, phosphorus, and ammonia. Chernozem is very fertile and can PRODUCE high agricultural yields with its high MOISTURE STORAGE capacity.

Discussion

31.	What can you say about the motion of an object if its speed-time graph is a straight line parallel to the time axis?
Answer» Speed-time graph is a STRAIGHT line parallel to time axis, it means that the speed of the object is not changing with time i.e., the object is performing UNIFORM MOTION.

Discussion

32.	5. Write the four Quantum numbers for the differentiating electron of Nitro.gen atom?
Answer» ANSWER:any OPTION please Explanation:

32.

5. Write the four Quantum numbers for the differentiating electron of Nitro.gen atom?

Answer»

ANSWER:any OPTION please

Explanation:

Discussion

33.	Example 230 Tiwo point charges each 50 uC are fined onis at y=+ 4 m and y=-4 m. Another charged parahaving charge - 50 uC and mass 20 g is moving along thepositive X-axis. When it is at x=-3 m, its speed is 20 mesFind the speed of charged particle when it reaches to angAlso find distance of charged particle from origin, whenkinetic energy becomes zero.Sol30 uC = 04 m20 ms
Answer» ANSWER: idk Explanation:

33.

Example 230 Tiwo point charges each 50 uC are fined onis at y=+ 4 m and y=-4 m. Another charged parahaving charge - 50 uC and mass 20 g is moving along thepositive X-axis. When it is at x=-3 m, its speed is 20 mesFind the speed of charged particle when it reaches to angAlso find distance of charged particle from origin, whenkinetic energy becomes zero.Sol30 uC = 04 m20 ms

Answer»

ANSWER:

idk

Explanation:

Discussion

34.	Find dy/dx of the above question
Answer» ANSWER: THR answer is GIVEN in the PICTURE.

34.

Find dy/dx of the above question

Answer»

ANSWER:

THR answer is GIVEN in the PICTURE.

Discussion

35.	Write down the equation for the work done in a stretchedwire.
Answer» In stretching a wire work is DONE against internal RESTORING forces. This work is stored as ELASTIC potential energy or strain energy.

35.

Write down the equation for the work done in a stretchedwire.

Answer»

In stretching a wire work is DONE against internal RESTORING forces. This work is stored as ELASTIC potential energy or strain energy.

Discussion

36.	write a reaction when calcium oxide reacts with water to give calcium hydronide? balance the equation?
Answer» Answer: he is blast Explanation: the TEMPERATURE of an ideal gas in a SEALED container of volume V is increased from T to 3T. what will HAPPEN to the pressure of the gas?

36.

write a reaction when calcium oxide reacts with water to give calcium hydronide? balance the equation?

Answer»

Answer:

he is blast

Explanation:

the TEMPERATURE of an ideal gas in a SEALED container of volume V is increased from T to 3T. what will HAPPEN to the pressure of the gas?

Discussion

37.	4.Find the length of a seconds’ pendulum at a placewhere g = 10 m s-2 (Take a = 3-14).Ans. 1-0142 milona
Answer» ANSWER: PENDULUM is। a high Explanation: C) GLIDE REFLECTION

37.

4.Find the length of a seconds’ pendulum at a placewhere g = 10 m s-2 (Take a = 3-14).Ans. 1-0142 milona

Answer»

ANSWER:

PENDULUM is। a high

Explanation:

C) GLIDE REFLECTION

Discussion

38.	A: All the elements in a group have similar chemical properties.B: The elements in a period have different chemical properties.(A) Both A and B are correct(B) A is correct, B is incorrect(C) A is incorrect, B is correct
Answer» both A and B are correct Explanation: All the ELEMENTS in a GROUP have similar chemical properties. The elements in a period have different chemical properties

38.

A: All the elements in a group have similar chemical properties.B: The elements in a period have different chemical properties.(A) Both A and B are correct(B) A is correct, B is incorrect(C) A is incorrect, B is correct

Answer»

both A and B are correct

Explanation:

All the ELEMENTS in a GROUP have similar chemical properties.

The elements in a period have different chemical properties

Discussion

39.	compare and calculate mass and weight of ram on the earth and the moon if the body mass of ram is 60 kg
Answer» We have, Body mass of the RAM (m) = $60 kg$ ∴ The ram's mass on the moon = $60 kg$ (∵ mass remains constant throughout the universe) Similarly, the ram's mass on Earth = $60 kg$ Now, we know that weight is actually a measure of force, THUS it is different from the concept of mass This means, Weight (W) = Force (F) ⇒ W = mass (m) × acceleration due to gravity (a) = ma ∴ Ram's weight on Earth = ma = $40kg$ × $9.8m/s^2$ = $392$ $kg.m/s^2$ = $392$ N (∵ W = F) Now, the ram's weight on Moon = $\frac{1}{6}$ (Ram's weight on Earth) = $\frac{1}{6}$ × $392$ N = $65.33$ N *Ans) Mass of the ram on Earth = 60 kg* *Mass of the ram on the moon = 60 kg* *Weight of the ram on Earth = 392 N* *Weight of the ram on the moon = 65.33 N*

39.

compare and calculate mass and weight of ram on the earth and the moon if the body mass of ram is 60 kg

Answer»

We have,

Body mass of the RAM (m) = $60 kg$

∴ The ram's mass on the moon = $60 kg$ (∵ mass remains constant throughout the universe)

Similarly, the ram's mass on Earth = $60 kg$

Now, we know that weight is actually a measure of force, THUS it is different from the concept of mass

This means, Weight (W) = Force (F)

⇒ W = mass (m) × acceleration due to gravity (a) = ma

∴ Ram's weight on Earth = ma = $40kg$ × $9.8m/s^2$ = $392$ $kg.m/s^2$ = $392$ N (∵ W = F)

Now, the ram's weight on Moon = $\frac{1}{6}$ (Ram's weight on Earth) = $\frac{1}{6}$ × $392$ N = $65.33$ N

Ans) Mass of the ram on Earth = 60 kg

Mass of the ram on the moon = 60 kg

Weight of the ram on Earth = 392 N

Weight of the ram on the moon = 65.33 N

Discussion

40.	Mga Tanong: NCgtapos ang bawat gawain? Isulat itong talahanayan sa ibaba.ORASKILOSCthoseTTYOPaglakadPagkandiritPagtakboPagluksoPag-igpawPaglukso-lukso
Answer» EXPLANATION: GAWAIN? ISULAT ito ng talahanayan SA ibaba. ORAS KILOS C those TTYO Paglakad Pagkandirit Pagtakbo Paglukso Pag-igpaw Paglukso-lukso

40.

Mga Tanong: NCgtapos ang bawat gawain? Isulat itong talahanayan sa ibaba.ORASKILOSCthoseTTYOPaglakadPagkandiritPagtakboPagluksoPag-igpawPaglukso-lukso

Answer»

EXPLANATION:

GAWAIN? ISULAT ito

ng talahanayan SA ibaba.

ORAS

KILOS

C

those

TTYO

Paglakad

Pagkandirit

Pagtakbo

Paglukso

Pag-igpaw

Paglukso-lukso

Discussion

41.	A bulb is marked '230V-60 W' , what does it indicate?
Answer» Answer: 230 VOLTES 60 WATTS i THINK so

41.

A bulb is marked '230V-60 W' , what does it indicate?

Answer»

Answer:

230 VOLTES 60 WATTS i THINK so

Discussion

42.	Q 9.Q No 5) A bullet of mass 40 gm is fired from a gun of mass 8kgwith a velocity of 800m/s.calculate the recoil velocity of gun.1.1 m/s 2.-1 m/s 3.2 m/s 4.-4 m/s
Answer» ANSWER: -4 m/s Explanation: Given that MASS of bullet (m') = 40 gm = (40/1000) = 0.04 kg. Mass of GUN (m") = 8 kg. Velocity of bullet after firing (v') = 800 m/s Please mark me as Brainlist

42.

Q 9.Q No 5) A bullet of mass 40 gm is fired from a gun of mass 8kgwith a velocity of 800m/s.calculate the recoil velocity of gun.1.1 m/s 2.-1 m/s 3.2 m/s 4.-4 m/s

Answer»

ANSWER:

-4 m/s

Explanation:

Given that MASS of bullet (m') = 40 gm = (40/1000) = 0.04 kg. Mass of GUN (m") = 8 kg. Velocity of bullet after firing (v') = 800 m/s

Please mark me as Brainlist

Discussion

43.	Difine Poissons ratio
Answer» The ratio of the proportional decrease in a LATERAL measurement to the proportional increase in length in a sample of MATERIAL that is elastically STRETCHED.

Discussion

44.	Sodium chloride solution exists in liquid state. Current flowing through sodium chloride solution is dueto the flow of cations and anions. Mercury also exists in liquid state. Current through liquid mercury isdue to the flow of(A) cations only (B) anions only(C) both cations and anions (D) Neither cations nor anions
Answer» ANSWER: D Explanation:

44.

Sodium chloride solution exists in liquid state. Current flowing through sodium chloride solution is dueto the flow of cations and anions. Mercury also exists in liquid state. Current through liquid mercury isdue to the flow of(A) cations only (B) anions only(C) both cations and anions (D) Neither cations nor anions

Answer»

ANSWER:

D

Explanation:

Discussion

45.	Electron accelerate by potential difference of 250 V enter the electric field at angle of incidence of 50 degree and get refracted through an angle of 30 degree . Find the potential of second region. *585.2 V600 V700 V500 V
Answer» ANSWER: angle of INCIDENCE of 50 degree and get refracted through an angle of 30 degree . Find the POTENTIAL of second REGION the answer is = 700v

45.

Electron accelerate by potential difference of 250 V enter the electric field at angle of incidence of 50 degree and get refracted through an angle of 30 degree . Find the potential of second region. *585.2 V600 V700 V500 V

Answer»

ANSWER:

angle of INCIDENCE of 50 degree and get refracted through an angle of 30 degree . Find the POTENTIAL of second REGION

the answer is = 700v

Discussion

46.	The resistance per metre of a wire is 1.2 Q and its specific resistance is 60.28x 10-8 ohm-m. Find the radius of the wire.
Answer» EXPLANATION: AREA of a cross-section of the WIRE. READ more on Sarthaks.com - HTTPS://www.sarthaks.com/170966/the-resistance-per-metre-length-wire-if-the-resistivity-of-the-material-the-wire-ohm-metre

46.

The resistance per metre of a wire is 1.2 Q and its specific resistance is 60.28x 10-8 ohm-m. Find the radius of the wire.

Answer»

EXPLANATION:

AREA of a cross-section of the WIRE. READ more on Sarthaks.com - HTTPS://www.sarthaks.com/170966/the-resistance-per-metre-length-wire-if-the-resistivity-of-the-material-the-wire-ohm-metre

Discussion

47.	QuestionV1, V2 and V3 are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.Which of the following shows the correct values of V1, V2 and V3 measured in volts?please help no spamming
Answer» Answer: here formula is R=V/I so from PRBLM we have R and I values so we NEED to find V value it's direct V=R×I V1=R1 ×I V1= 1×5 V1= 5V is answer like this smilar do for other 2 values just U submit values of R and I thts it . and here value of I is CONSTANT only Value of R is changing

47.

QuestionV1, V2 and V3 are the potential differences across the 1Ω, 2Ω and 3Ω resistors in the following diagram, and the current is 5A.Which of the following shows the correct values of V1, V2 and V3 measured in volts?please help no spamming

Answer»

Answer:

here formula is R=V/I so from PRBLM we have R and I values so we NEED to find V value it's direct

V=R×I

V1=R1 ×I

V1= 1×5

V1= 5V is answer like this smilar do for other 2 values just U submit values of R and I thts it . and here value of I is CONSTANT only Value of R is changing

Discussion

48.	How do you observe nucleus in cheak cell
Answer» Methods Take a CLEAN cotton swab and gently scrape the inside of your mouth. Smear the cotton swab on the centre of the microscope slide for 2 to 3 seconds. Add a drop of methylene BLUE SOLUTION and place a coverslip on top. ... Remove any excess solution by allowing a paper TOWEL to touch one side of the coverslip. ★ ° . *　　　°　.　°☆ 　. * ● ¸ . 　　　★ 　° :. ★　 * • ○ ° ★　 .　 * 　.　　　　　　. 　 ° 　. ● . ★ ° . *　　　°　.　°☆ 　. * ● ¸ . 　　　★ 　° :●. 　 * • ○ ° ★　 .　 * 　.　　　　　　. 　 ° 　. ● . ★ ° . *　　　°　.　 °☆ 　. * ● ¸ . 　　　★ 　 ° :. 　 * • ○ ° ★　 .　 * 　.　　★　　　　. 　 ° 　. . 　 ★　　　 ° °☆ 　¸

48.

How do you observe nucleus in cheak cell

Answer»

Methods

Take a CLEAN cotton swab and gently scrape the inside of your mouth.
Smear the cotton swab on the centre of the microscope slide for 2 to 3 seconds.
Add a drop of methylene BLUE SOLUTION and place a coverslip on top. ...
Remove any excess solution by allowing a paper TOWEL to touch one side of the coverslip.
★ ° . *　　　°　.　°☆ 　. * ● ¸ . 　　　★ 　° :. ★　 * • ○ ° ★　 .　 * 　.　　　　　　. 　 ° 　. ● . ★ ° . *　　　°　.　°☆ 　. * ● ¸ . 　　　★ 　° :●. 　 * • ○ ° ★　 .　 * 　.　　　　　　. 　 ° 　. ● . ★ ° . *　　　°　.　 °☆ 　. * ● ¸ . 　　　★ 　 ° :. 　 * • ○ ° ★　 .　 * 　.　　★　　　　. 　 ° 　. . 　 ★　　　 ° °☆ 　¸

Discussion

49.	A copper coil has a resistance of 40 ohm at 0°C find the resistance of the coil at 50°C
Answer» ANSWER: copper coil has a RESISTANCE of 40 OHM at 0°C find the resistance of the coil at 50°C the resistance = 67ohm

49.

A copper coil has a resistance of 40 ohm at 0°C find the resistance of the coil at 50°C

Answer»

ANSWER:

copper coil has a RESISTANCE of 40 OHM at 0°C find the resistance of the coil at 50°C

the resistance = 67ohm

Discussion

50.	the acid and base react together forming a new coumpond known as (a) real (b) imaginary (c) unreal (d) non-imaginary
Answer» Here is ur answer:- An ACID and a BASE react together forming a new compound KNOWN as salt and water. Some extra info: → when an acid reacts with base, NEUTRALIZATION takes place.

50.

the acid and base react together forming a new coumpond known as (a) real (b) imaginary (c) unreal (d) non-imaginary

Answer»

Here is ur answer:- An ACID and a BASE react together forming a new compound KNOWN as salt and water. Some extra info: → when an acid reacts with base, NEUTRALIZATION takes place.

Discussion

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A copper coil has a resistance of 40 ohm at 0°C find the resistance of the coil at 50°C

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