9478 + Interview Questions in Physics Page 100 InterviewSolution

4951.	With which of the following speeds should an object move through a fluid so as to experience minimum drag? 6 m/s 4 m/s 8 m/s 9 m/s
Answer» With which of the following speeds should an object move through a fluid so as to experience minimum drag? 6 m/s 4 m/s 8 m/s 9 m/s

Discussion

4952.	Difference between latent heat of fusion and latent heat of vaporization.
Answer» Difference between latent heat of fusion and latent heat of vaporization.

Discussion

4953.	90. Q. A parellel plate capacitor consists of 26 metal strips, each of 3cmx4cm, separated by mica sheets of dielectric constant 6 and uniform thickness 0.2 mm. Find the capacitance.
Answer» 90. Q. A parellel plate capacitor consists of 26 metal strips, each of 3cmx4cm, separated by mica sheets of dielectric constant 6 and uniform thickness 0.2 mm. Find the capacitance.

Discussion

4954.	70. 50 ml of hydrogen gas was collected over at 23^° C , 740 mm Hg barometric pressure. Hydrogen was produced by the electrolysis of water. The voltage was constant at 2.1 volts, the current averaged 0.50 ampere for 12 minutes and 20 seconds. Calculate Avogadro constant.
Answer» 70. 50 ml of hydrogen gas was collected over at 23^° C , 740 mm Hg barometric pressure. Hydrogen was produced by the electrolysis of water. The voltage was constant at 2.1 volts, the current averaged 0.50 ampere for 12 minutes and 20 seconds. Calculate Avogadro constant.

Discussion

4955.	a body of mass 5 kg falls from a height of 30 metre. If its all mechanical energy is changed into heat, then heat produced will be
Answer» a body of mass 5 kg falls from a height of 30 metre. If its all mechanical energy is changed into heat, then heat produced will be

Discussion

4956.	why this statement is wrong about electric charg: charge are converted into energy and energy can be converted into charg
Answer» why this statement is wrong about electric charg: charge are converted into energy and energy can be converted into charg

Discussion

4957.	what is homogenous gas phase
Answer» what is homogenous gas phase

Discussion

4958.	The poet says, “Beauty is heard in…”Can you hear beauty? Add a sound that you think is beautiful to the sounds the poet thinks are beautiful.The poet, Shelley, said:Heard melodies are sweet,But those unheard are sweeter.What do you think this means? Have you ever ‘heard’ a song in your head, long after the song was sung or played?
Answer» The poet says, “Beauty is heard in…” Can you hear beauty? Add a sound that you think is beautiful to the sounds the poet thinks are beautiful. The poet, Shelley, said: Heard melodies are sweet, But those unheard are sweeter. What do you think this means? Have you ever ‘heard’ a song in your head, long after the song was sung or played?

4958.

The poet says, “Beauty is heard in…”Can you hear beauty? Add a sound that you think is beautiful to the sounds the poet thinks are beautiful.The poet, Shelley, said:Heard melodies are sweet,But those unheard are sweeter.What do you think this means? Have you ever ‘heard’ a song in your head, long after the song was sung or played?

Answer»

The poet says, “Beauty is heard in…”

Can you hear beauty? Add a sound that you think is beautiful to the sounds the poet thinks are beautiful.

The poet, Shelley, said:

Heard melodies are sweet,

But those unheard are sweeter.

What do you think this means? Have you ever ‘heard’ a song in your head, long after the song was sung or played?

Discussion

4959.	Find the pressure in pascal when a thrust of 100 kgf is acting on a surface of area 5 m2.
Answer» Find the pressure in pascal when a thrust of $100 k g f$ is acting on a surface of area $5 m^{2}$ .

Discussion

4960.	is flow elecrons electricity
Answer» is flow elecrons electricity

Discussion

4961.	What is a density bottle? How is it used to find the density of a liquid?
Answer» What is a density bottle? How is it used to find the density of a liquid?

Discussion

4962.	Find the initial velocity and acceleration of a body, if the distance travelled by that body in nth second is (5.96+0.08n) m?
Answer» Find the initial velocity and acceleration of a body, if the distance travelled by that body in nth second is (5.96+0.08n) m?

Discussion

4963.	Bending moment diagram for a over hanged beam is shown in figure. [Consider the supports at B and D]The magnitude of maximum shear force is _____kN.4
Answer» Bending moment diagram for a over hanged beam is shown in figure. [Consider the supports at B and D] The magnitude of maximum shear force is _____kN. 4

Discussion

4964.	Which of the following area of India is not the most threatened by earthquakes? (a) North-East (b) Kashmir (c) West Bengal (d) Rajasthan
Answer» Which of the following area of India is not the most threatened by earthquakes? (a) North-East (b) Kashmir (c) West Bengal (d) Rajasthan

4964.

Which of the following area of India is not the most threatened by earthquakes? (a) North-East (b) Kashmir (c) West Bengal (d) Rajasthan

Answer»

Which of the following area of India is not the most threatened by earthquakes?

(a) North-East (b) Kashmir (c) West Bengal (d) Rajasthan

Discussion

4965.	Why is the surface of a slide polished to make it smooth?
Answer» Why is the surface of a slide polished to make it smooth?

Discussion

4966.	Why is the word ‘ambulance’ written on an ambulance as ?
Answer» Why is the word ‘ambulance’ written on an ambulance as ?

Discussion

4967.	Fill the following table. "ObjectsrubbedMaterialusedforrubbingAttracts/doesnotattractpiecesofpaperCharged/notchargedRefillpolythene,woollenclothBalloonpolythene,woollencloth,dryhairEraserwoolSteelspoonpolythene,woolencloth "
Answer» Fill the following table. " $\begin{matrix} O b j e c t s r u b b e d & M a t e r i a l u s e d f o r r u b b i n g & A t t r a c t s / d o e s n o t a t t r a c t p i e c e s o f p a p e r & C h a r g e d / n o t c h a r g e d R e f i l l & p o l y t h e n e, w o o l l e n c l o t h B a l l o o n & p o l y t h e n e, w o o l l e n c l o t h, d r y h a i r E r a s e r & w o o l S t e e l s p o o n & p o l y t h e n e, w o o l e n c l o t h \end{matrix}$ "

4967.

Fill the following table. "ObjectsrubbedMaterialusedforrubbingAttracts/doesnotattractpiecesofpaperCharged/notchargedRefillpolythene,woollenclothBalloonpolythene,woollencloth,dryhairEraserwoolSteelspoonpolythene,woolencloth "

Answer»

Fill the following table.

" $\begin{matrix} O b j e c t s r u b b e d & M a t e r i a l u s e d f o r r u b b i n g & A t t r a c t s / d o e s n o t a t t r a c t p i e c e s o f p a p e r & C h a r g e d / n o t c h a r g e d R e f i l l & p o l y t h e n e, w o o l l e n c l o t h B a l l o o n & p o l y t h e n e, w o o l l e n c l o t h, d r y h a i r E r a s e r & w o o l S t e e l s p o o n & p o l y t h e n e, w o o l e n c l o t h \end{matrix}$ "

Discussion

4968.	Cataract is generally due to _________.
Answer» Cataract is generally due to _________.

Discussion

4969.	Charge is uniformly distributed with volume charge density 2ρ in a spherical volume of radius R.A spherical cavity of radius r (R>r) is made in charge distribution such that the centre of the cavity is at a dis†an ce a from the centre of the charge distributtion then the electric field in the cavity i
Answer» Charge is uniformly distributed with volume charge density 2ρ in a spherical volume of radius R.A spherical cavity of radius r (R>r) is made in charge distribution such that the centre of the cavity is at a dis†an ce a from the centre of the charge distributtion then the electric field in the cavity i

Discussion

4970.	A frame PQRS is placed in a region where magnetic field B is present, as shown in the figure. A rod of length 2 m moves with a constant velocity 25 m/s and the strength of the magnetic field inside the plane of paper is 0.1 T. If the resistance of the rod is 10 Ω and the resistance of the frame is negligible, then calculate the power spent in this process
Answer» A frame $PQRS$ is placed in a region where magnetic field $B$ is present, as shown in the figure. A rod of length $2 m$ moves with a constant velocity $25 m/s$ and the strength of the magnetic field inside the plane of paper is $0.1 T$ . If the resistance of the rod is $10 Ω$ and the resistance of the frame is negligible, then calculate the power spent in this process

Discussion

4971.	A boy fires a gun and another boy at a distance of 1360 m hears the sound of firing the gun 4 s after its smoke is seen. Find the speed of sound.
Answer» A boy fires a gun and another boy at a distance of 1360 m hears the sound of firing the gun 4 s after its smoke is seen. Find the speed of sound.

Discussion

4972.	We see the lightning flash before we can hear thunder because
Answer» We see the lightning flash before we can hear thunder because

Discussion

4973.	Question 5If we apply oil on door hinges, the friction will(a) increase(b) decrease(c) disappear altogether(d) will remain unchanged
Answer» Question 5 If we apply oil on door hinges, the friction will (a) increase (b) decrease (c) disappear altogether (d) will remain unchanged

Discussion

4974.	Temperature is defined as ___.
Answer» Temperature is defined as ___.

Discussion

4975.	Pressure at a point in a liquid increases if we:
Answer» Pressure at a point in a liquid increases if we:

Discussion

4976.	Name the scientist who showed that lightning is electric in nature.
Answer» Name the scientist who showed that lightning is electric in nature.

Discussion

4977.	Can light bend around objects in its path?
Answer» Can light bend around objects in its path?

Discussion

4978.	strain energy stored in a body w.r.t. densit
Answer» strain energy stored in a body w.r.t. densit

Discussion

4979.	Name the factors that affect magnetic induction of a magnetic material.
Answer» Name the factors that affect magnetic induction of a magnetic material.

Discussion

4980.	6. If pressure at the half depth of a lake is equal to times the pressure at its bottom, then4find the depth of the lake. \lbrack Take g 10 m/s2\rbrack
Answer» 6. If pressure at the half depth of a lake is equal to times the pressure at its bottom, then4find the depth of the lake. \lbrack Take g 10 m/s2\rbrack

Discussion

4981.	A simple pendulum of length l=30 and mass=2kg is attached to cart of mass 3kg.The cart can move frictionlessly on level ground.The bob is released from rest when string makes an angle of 1.8^° with the horizontal.Then what is the amplitude of oscillation of cart, the time period of oscillation,phase difference of oscilation of cart and bob is
Answer» A simple pendulum of length l=30 and mass=2kg is attached to cart of mass 3kg.The cart can move frictionlessly on level ground.The bob is released from rest when string makes an angle of 1.8^° with the horizontal.Then what is the amplitude of oscillation of cart, the time period of oscillation,phase difference of oscilation of cart and bob is

Discussion

4982.	What is binary stars
Answer» What is binary stars

Discussion

4983.	94.A ball dropped from a height 'h' reaches the ground in time 'T'. What is its height at time 3T / 4?
Answer» 94.A ball dropped from a height 'h' reaches the ground in time 'T'. What is its height at time 3T / 4?

Discussion

4984.	While swimming in the sea a fish gulps some air and then releases it in the form of bubbles. Why does the size of bubbles decrease?
Answer» While swimming in the sea a fish gulps some air and then releases it in the form of bubbles. Why does the size of bubbles decrease?

Discussion

4985.	You have said that atmospheric pressure can be controlled by a human body but why can't it control the weight of a solid
Answer» You have said that atmospheric pressure can be controlled by a human body but why can't it control the weight of a solid

Discussion

4986.	which of the following have paramagnetic character 1.S2- 2.S2 3.S8 4.S6
Answer» which of the following have paramagnetic character 1.S2- 2.S2 3.S8 4.S6

Discussion

4987.	An optical instrument which can split white light into seven different colors is known as ___
Answer» An optical instrument which can split white light into seven different colors is known as ___

Discussion

4988.	How long does it take for a sound wave of frequency 2 kHz and a wavelength of 35 cm to travel a distance of 1.5 km?
Answer» How long does it take for a sound wave of frequency $2 k H z$ and a wavelength of $35 c m$ to travel a distance of $1.5 k m$ ?

Discussion

4989.	One end of a string is being pulled with a force of 10N.The other end of the string is being pulled with a force of 1N. What will be the tension in the string
Answer» One end of a string is being pulled with a force of 10N.The other end of the string is being pulled with a force of 1N. What will be the tension in the string

Discussion

4990.	Why do we consider light as rays if we see it in the real world in the form of images only?
Answer» Why do we consider light as rays if we see it in the real world in the form of images only?

Discussion

4991.	What do you understand by the term "evolution of a star"?
Answer» What do you understand by the term "evolution of a star"?

Discussion

4992.	Why the every action has same and equal reaction on act of two different body. It can be 4 to 5 different body know what the reason????
Answer» Why the every action has same and equal reaction on act of two different body. It can be 4 to 5 different body know what the reason????

Discussion

4993.	Manasa stands between a set of parallel plane mirrors M1 and M2 as shown in the diagram below. There is a flower on Rose's hat that is located a distance of 0.4 m from M1 and a distance of 1.0 m from M2. Since the mirrors are parallel, Rose will see an infinite number of images of the flower as she looks in mirror M2. These images stretch towards infinity. Some of the images are closer to the mirror than others. Determine the distance between mirror M2 and the third nearest image?
Answer» Manasa stands between a set of parallel plane mirrors $M_{1}$ and $M_{2}$ as shown in the diagram below. There is a flower on Rose's hat that is located a distance of 0.4 m from $M_{1}$ and a distance of 1.0 m from $M_{2}$ . Since the mirrors are parallel, Rose will see an infinite number of images of the flower as she looks in mirror $M_{2}$ . These images stretch towards infinity. Some of the images are closer to the mirror than others. Determine the distance between mirror $M_{2}$ and the third nearest image?

4993.

Manasa stands between a set of parallel plane mirrors M1 and M2 as shown in the diagram below. There is a flower on Rose's hat that is located a distance of 0.4 m from M1 and a distance of 1.0 m from M2. Since the mirrors are parallel, Rose will see an infinite number of images of the flower as she looks in mirror M2. These images stretch towards infinity. Some of the images are closer to the mirror than others. Determine the distance between mirror M2 and the third nearest image?

Answer»

Manasa stands between a set of parallel plane mirrors $M_{1}$ and $M_{2}$ as shown in the diagram below. There is a flower on Rose's hat that is located a distance of 0.4 m from $M_{1}$ and a distance of 1.0 m from $M_{2}$ . Since the mirrors are parallel, Rose will see an infinite number of images of the flower as she looks in mirror $M_{2}$ . These images stretch towards infinity. Some of the images are closer to the mirror than others. Determine the distance between mirror $M_{2}$ and the third nearest image?

Discussion

4994.	When a liquid starts to boil its temperature ___.
Answer» When a liquid starts to boil its temperature ___.

Discussion

4995.	A stone is dropped into a deep well and is heard to hit the water 2 s after being dropped. Determine the depth of the well. Assume no time delay in stone hitting the water and sound being heard. Take a=10ms2.
Answer» A stone is dropped into a deep well and is heard to hit the water 2 s after being dropped. Determine the depth of the well. Assume no time delay in stone hitting the water and sound being heard. $T a k e a = 10 \frac{m}{s^{2}}$ .

Discussion

4996.	41. A spring of force constant K is cut into 3 pieces of length 1:2:3 . Then the new force constant for the spring would be
Answer» 41. A spring of force constant K is cut into 3 pieces of length 1:2:3 . Then the new force constant for the spring would be

Discussion

4997.	___ is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them.
Answer» ___ is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them.

Discussion

4998.	Select the correct alternative : (a) In evaporation : (i) all molecules of liquid begin to escape out (ii) only the molecules at the surface escape out (iii) the temperature of the liquid rises by absorbing heat from surroundings. (iv) the molecules get attracted within the liquid. (b) The rate of evaporation of a liquid increases when : (i) the temperature of liquid falls (ii) the liquid is poured in a vessel of less surface area (iii) air is blown above the surface of the liquid (iv) humidity increases. (c) During boiling or vaporization : (i) all molecules take part (ii) temperature rises (iii) no heat is absorbed (iv) the average kinetic energy of molecules increases. (d) The boiling point of a liquid is increased by : (i) increasing the volume of liquid (ii) increasing the pressure on the liquid. (iii) adding ice to the liquid (iv) decreasing pressure on the liquid. (e) Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from 0∘ to 100∘C. Then : (i) both the rods A and B elongate the same (ii) the rod A elongates more than the rod B (iii) the rod B elongates more than the rod A (iv) the rod A elongates, but the rod B contracts. (f) Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then : (i) the solid rod A expands more than the hollow rod B (ii) the hollow rod B expands more than the solid rod A (iii) the hollow rod B contracts, but the solid rod A expands (iv) both the rods A and B expand the same. (g) A given volume of alcohol and the same volume of water are heated from the room temperature to the same temperature then : (i) alcohol contracts, but water expands (ii) water contracts, but alcohol expands (iii) water expands more than alcohol (iv) alcohol expands more than water. (h) The increase in length of a metal rod depends on : (i) the initial length of the rod only (ii) the rise in temperature only (iii) the material of rod only (iv)all the above three factors. (i) The correct statement is : (i) Iron rims are cooled before they are placed on the cart wheels. (ii) A glass stopper gets tightened on warming the neck of the bottle. (iii) Telephone wires sag in winter, but become tight in summer. (iv) A little space is left between two rails on a railway track.
Answer» Select the correct alternative : (a) In evaporation : (i) all molecules of liquid begin to escape out (ii) only the molecules at the surface escape out (iii) the temperature of the liquid rises by absorbing heat from surroundings. (iv) the molecules get attracted within the liquid. (b) The rate of evaporation of a liquid increases when : (i) the temperature of liquid falls (ii) the liquid is poured in a vessel of less surface area (iii) air is blown above the surface of the liquid (iv) humidity increases. (c) During boiling or vaporization : (i) all molecules take part (ii) temperature rises (iii) no heat is absorbed (iv) the average kinetic energy of molecules increases. (d) The boiling point of a liquid is increased by : (i) increasing the volume of liquid (ii) increasing the pressure on the liquid. (iii) adding ice to the liquid (iv) decreasing pressure on the liquid. (e) Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from $0^{\circ}$ to $100^{\circ} C$ . Then : (i) both the rods A and B elongate the same (ii) the rod A elongates more than the rod B (iii) the rod B elongates more than the rod A (iv) the rod A elongates, but the rod B contracts. (f) Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then : (i) the solid rod A expands more than the hollow rod B (ii) the hollow rod B expands more than the solid rod A (iii) the hollow rod B contracts, but the solid rod A expands (iv) both the rods A and B expand the same. (g) A given volume of alcohol and the same volume of water are heated from the room temperature to the same temperature then : (i) alcohol contracts, but water expands (ii) water contracts, but alcohol expands (iii) water expands more than alcohol (iv) alcohol expands more than water. (h) The increase in length of a metal rod depends on : (i) the initial length of the rod only (ii) the rise in temperature only (iii) the material of rod only (iv)all the above three factors. (i) The correct statement is : (i) Iron rims are cooled before they are placed on the cart wheels. (ii) A glass stopper gets tightened on warming the neck of the bottle. (iii) Telephone wires sag in winter, but become tight in summer. (iv) A little space is left between two rails on a railway track.

4998.

Select the correct alternative : (a) In evaporation : (i) all molecules of liquid begin to escape out (ii) only the molecules at the surface escape out (iii) the temperature of the liquid rises by absorbing heat from surroundings. (iv) the molecules get attracted within the liquid. (b) The rate of evaporation of a liquid increases when : (i) the temperature of liquid falls (ii) the liquid is poured in a vessel of less surface area (iii) air is blown above the surface of the liquid (iv) humidity increases. (c) During boiling or vaporization : (i) all molecules take part (ii) temperature rises (iii) no heat is absorbed (iv) the average kinetic energy of molecules increases. (d) The boiling point of a liquid is increased by : (i) increasing the volume of liquid (ii) increasing the pressure on the liquid. (iii) adding ice to the liquid (iv) decreasing pressure on the liquid. (e) Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from 0∘ to 100∘C. Then : (i) both the rods A and B elongate the same (ii) the rod A elongates more than the rod B (iii) the rod B elongates more than the rod A (iv) the rod A elongates, but the rod B contracts. (f) Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then : (i) the solid rod A expands more than the hollow rod B (ii) the hollow rod B expands more than the solid rod A (iii) the hollow rod B contracts, but the solid rod A expands (iv) both the rods A and B expand the same. (g) A given volume of alcohol and the same volume of water are heated from the room temperature to the same temperature then : (i) alcohol contracts, but water expands (ii) water contracts, but alcohol expands (iii) water expands more than alcohol (iv) alcohol expands more than water. (h) The increase in length of a metal rod depends on : (i) the initial length of the rod only (ii) the rise in temperature only (iii) the material of rod only (iv)all the above three factors. (i) The correct statement is : (i) Iron rims are cooled before they are placed on the cart wheels. (ii) A glass stopper gets tightened on warming the neck of the bottle. (iii) Telephone wires sag in winter, but become tight in summer. (iv) A little space is left between two rails on a railway track.

Answer»

Select the correct alternative :

(a) In evaporation :

(i) all molecules of liquid begin to escape out

(ii) only the molecules at the surface escape out

(iii) the temperature of the liquid rises by absorbing heat from surroundings.

(iv) the molecules get attracted within the liquid.

(b) The rate of evaporation of a liquid increases when :

(i) the temperature of liquid falls

(ii) the liquid is poured in a vessel of less surface area

(iii) air is blown above the surface of the liquid

(iv) humidity increases.

(c) During boiling or vaporization :

(i) all molecules take part

(ii) temperature rises

(iii) no heat is absorbed

(iv) the average kinetic energy of molecules increases.

(d) The boiling point of a liquid is increased by :

(i) increasing the volume of liquid

(ii) increasing the pressure on the liquid.

(iii) adding ice to the liquid

(iv) decreasing pressure on the liquid.

(e) Two rods A and B of the same metal, but of length 1 m and 2 m respectively, are heated from $0^{\circ}$ to $100^{\circ} C$ . Then :

(i) both the rods A and B elongate the same

(ii) the rod A elongates more than the rod B

(iii) the rod B elongates more than the rod A

(iv) the rod A elongates, but the rod B contracts.

(f) Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then :

(i) the solid rod A expands more than the hollow rod B

(ii) the hollow rod B expands more than the solid rod A

(iii) the hollow rod B contracts, but the solid rod A expands

(iv) both the rods A and B expand the same.

(g) A given volume of alcohol and the same volume of water are heated from the room temperature to the same temperature then :

(i) alcohol contracts, but water expands

(ii) water contracts, but alcohol expands

(iii) water expands more than alcohol

(iv) alcohol expands more than water.

(h) The increase in length of a metal rod depends on :

(i) the initial length of the rod only

(ii) the rise in temperature only

(iii) the material of rod only

(iv)all the above three factors.

(i) The correct statement is :

(i) Iron rims are cooled before they are placed on the cart wheels.

(ii) A glass stopper gets tightened on warming the neck of the bottle.

(iii) Telephone wires sag in winter, but become tight in summer.

(iv) A little space is left between two rails on a railway track.

Discussion

4999.	Friction acts , opposite to the direction of movement of object or in perpendicular direction to the movement of the object
Answer» Friction acts , opposite to the direction of movement of object or in perpendicular direction to the movement of the object

Discussion

5000.	In case where battery is removed and dielectric is inserted Electric field of dielectric changes and not the Electric field of plates. What does this mean?
Answer» In case where battery is removed and dielectric is inserted Electric field of dielectric changes and not the Electric field of plates. What does this mean?

Discussion

Explore topic-wise InterviewSolutions in .

With which of the following speeds should an object move through a fluid so as to experience minimum drag? 6 m/s 4 m/s 8 m/s 9 m/s

Difference between latent heat of fusion and latent heat of vaporization.

90. Q. A parellel plate capacitor consists of 26 metal strips, each of 3cmx4cm, separated by mica sheets of dielectric constant 6 and uniform thickness 0.2 mm. Find the capacitance.

70. 50 ml of hydrogen gas was collected over at 23^° C , 740 mm Hg barometric pressure. Hydrogen was produced by the electrolysis of water. The voltage was constant at 2.1 volts, the current averaged 0.50 ampere for 12 minutes and 20 seconds. Calculate Avogadro constant.

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what is homogenous gas phase

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is flow elecrons electricity

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Find the initial velocity and acceleration of a body, if the distance travelled by that body in nth second is (5.96+0.08n) m?

Bending moment diagram for a over hanged beam is shown in figure. [Consider the supports at B and D]The magnitude of maximum shear force is _____kN.4

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Why is the surface of a slide polished to make it smooth?

Why is the word ‘ambulance’ written on an ambulance as ?

Fill the following table. "ObjectsrubbedMaterialusedforrubbingAttracts/doesnotattractpiecesofpaperCharged/notchargedRefillpolythene,woollenclothBalloonpolythene,woollencloth,dryhairEraserwoolSteelspoonpolythene,woolencloth "

Cataract is generally due to _________.

A boy fires a gun and another boy at a distance of 1360 m hears the sound of firing the gun 4 s after its smoke is seen. Find the speed of sound.

We see the lightning flash before we can hear thunder because

Question 5If we apply oil on door hinges, the friction will(a) increase(b) decrease(c) disappear altogether(d) will remain unchanged

Temperature is defined as ___.

Pressure at a point in a liquid increases if we:

Name the scientist who showed that lightning is electric in nature.

Can light bend around objects in its path?

strain energy stored in a body w.r.t. densit

Name the factors that affect magnetic induction of a magnetic material.

6. If pressure at the half depth of a lake is equal to times the pressure at its bottom, then4find the depth of the lake. \lbrack Take g 10 m/s2\rbrack

What is binary stars

94.A ball dropped from a height 'h' reaches the ground in time 'T'. What is its height at time 3T / 4?

While swimming in the sea a fish gulps some air and then releases it in the form of bubbles. Why does the size of bubbles decrease?

You have said that atmospheric pressure can be controlled by a human body but why can't it control the weight of a solid

which of the following have paramagnetic character 1.S2- 2.S2 3.S8 4.S6

An optical instrument which can split white light into seven different colors is known as ___

How long does it take for a sound wave of frequency 2 kHz and a wavelength of 35 cm to travel a distance of 1.5 km?

One end of a string is being pulled with a force of 10N.The other end of the string is being pulled with a force of 1N. What will be the tension in the string

Why do we consider light as rays if we see it in the real world in the form of images only?

What do you understand by the term "evolution of a star"?

Why the every action has same and equal reaction on act of two different body. It can be 4 to 5 different body know what the reason????

When a liquid starts to boil its temperature ___.

A stone is dropped into a deep well and is heard to hit the water 2 s after being dropped. Determine the depth of the well. Assume no time delay in stone hitting the water and sound being heard. Take a=10ms2.

41. A spring of force constant K is cut into 3 pieces of length 1:2:3 . Then the new force constant for the spring would be

___ is the process by which ionic substances are decomposed into simpler substances when an electric current is passed through them.

Friction acts , opposite to the direction of movement of object or in perpendicular direction to the movement of the object

In case where battery is removed and dielectric is inserted Electric field of dielectric changes and not the Electric field of plates. What does this mean?