67486 + Interview Questions in Secondary School in Physics

1.	What is dimension of an dielectric constant?
Answer» The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is an expression of the extent to which a material CONCENTRATES electric flux, and is the electrical EQUIVALENT of RELATIVE MAGNETIC permeability

Discussion

2.	Temperature of the liquid decreases or increases during evaporation?Please give a reason for your answer.
Answer» Decrease as the LIQUID ABSORBS LATENT heat of VAPORIZATION from rest of liquid

Discussion

3.	Dimensional formula of temperature gradient
Answer» the temperature gradient is adimensional quantity EXPRESSED in units of degrees (on a particulartemperature scale) per unit length. The SI unit is KELVIN per METER (K/m). It can be found in the formula for dQ/dt, the rate of heat transfer per second.

Discussion

4.	Is weight a force ?define why
Answer» WEIGHT is a FORCE because of the GRAVITATIONAL force of the EARTH

Discussion

5.	what is the work done by the force of gravity on a satellite moving round the earth ?justify your answer
Answer» Zero..... bcoz the angle between FORCE of gravity and VELOCITY of satellite is 90 degree as DIRECTION of velocity is particle moving in circular path is TANGENT to the CIRCLE at each point and force of gravity acts towards the centre of orbit

Discussion

6.	If the volume is 1 by 4th of the real volume then what will be the effect on density?
Answer» If v1=v v2=v/4 we GET d1/d2=v2/v1 so we get d2=4d1 it INCREASED 4 TIMES

Discussion

7.	The current in a circuit containinga battery connected to 2 ohm resistance is 0.9 a
Answer» ANSWER 0.45A I=v/r = 0.9/2 = 0.45

7.

The current in a circuit containinga battery connected to 2 ohm resistance is 0.9 a

Answer»

ANSWER 0.45A

I=v/r

= 0.9/2

= 0.45

Discussion

8.	A bulb is rated 60 W, 240 V. If the same bulb is connected to a 192 V source, the current drawnthrough the bulb is found to be k10Ampere. Find the value of k
Answer» USE P=VI hope it HELPS you

Discussion

9.	Electromagetic induction with primary and secondary coil
Answer» Here is UR ANSWER FRIEND......

Discussion

10.	What is slinky\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|\|
Answer» Slinky. A slinky is a pre-compressed helical SPRING. It was invented by Richard James in the early 1940S. It can perform a number of tricks, such as TRAVELING down a flight of stairs, while moving END over end.

Discussion

11.	Two polarizers are oriented at 34° to one other. Light polarized by 17° angle to the optic axis of the first polarizer. What reduction takes place for the emerging light from the two polarizers. (cos 17°=0.956 and cos34°=0.829) (final answer must be in percentage)
Answer» according to malus law intensity is proportinal to (cos THETA)^2 total intensity = (cos17)^2 * (cos 34)^2 = (0.9139)(0.6872) = 0.628 so PERCENTAGE = 0.628100% = 62.8%

11.

Two polarizers are oriented at 34° to one other. Light polarized by 17° angle to the optic axis of the first polarizer. What reduction takes place for the emerging light from the two polarizers. (cos 17°=0.956 and cos34°=0.829) (final answer must be in percentage)

Answer»

according to malus law intensity is proportinal to (cos THETA)^2

total intensity = (cos17)^2 * (cos 34)^2 = (0.9139)*(0.6872) = 0.628

so PERCENTAGE = 0.628*100% = 62.8%

Discussion

12.	k=100N/cm , M=1 kg initially x=2cm and velocity = 2cm/s find minimum time to achieve maximum elongation and maximum compression
Answer» HELLO japman AARE U PUNJABI

Discussion

13.	What is meant by the statement the maganefiction produced by a spherical mirror is -2
Answer» If the magnification has a MINUS SIGN . the image is REAL and inverted. please MARK as brainliest

Discussion

14.	Imprtance of universal law 4 points very short class9
Answer» Answer: The UNIVERSAL law of gravitation is important because it accounts for the force that binds US to the Earth, motion of PLANETS around the SUN, motion of the Moon and other ARTIFICIAL satellites around the Earth, tides due to the Moon and the Sun and many other phenomena. Thankyou

14.

Imprtance of universal law 4 points very short class9

Answer»

Answer: The UNIVERSAL law of gravitation is important because it accounts for the force that binds US to the Earth, motion of PLANETS around the SUN, motion of the Moon and other ARTIFICIAL satellites around the Earth, tides due to the Moon and the Sun and many other phenomena.

Thankyou

Discussion

15.	Which colour shows maximum deviation when light is dispersed through prism
Answer» VIOLET colour SHOWS MAXIMUM deviation..and RED shows the LEAST

Discussion

16.	⦁ Is it true or wrong to say that, Vectors always start at the origin? Either yes or no justify it.
Answer» Position VECTORS are GENERALLY taken STARTING from ORIGIN but not all vectors

Discussion

17.	Which colour deviate minimum during the dispersion of light through a prism?
Answer» RED COLOUR DEVIATE MINIMUM.

Discussion

18.	Results of the electrical wiring
Answer» Why do we blame nation’s power SYSTEM without even checking the poor WIRING inside our home? It may be out-dated and won’t be efficient in supplying electricity to the appliances, electronics and lighting. The problem is that the circuits fitted during older days were not designed to power different types of electronic equipment or lighting of this era. There may be OBVIOUS signs of strains with more extension cords and single outlet paving the way to sprout power strips or lurking not seen at the back of ceilings, walls and cover plates. So when considering household electric appliances, your safety is the main goal. If you are facing high bills, flickering lights and damaged appliances at your home, you can MAKE sure the home circuit is not in a proper WORKING condition

Discussion

19.	Velocity of 126 km/hr find distance in 40 min
Answer» Velocity=distance/time

Discussion

20.	Explain why atmosphere is not present on the moon
Answer» Here is your answer Otherwise, the MOON is considered notto have an atmosphere because it cannot ABSORB measurable quantities of radiation, does not APPEAR layered or self-circulating, and requires CONSTANT replenishment due to the HIGH rate at which its gases are lost to space. Hope it will help:)

Discussion

21.	Moment of Inertia perpendicular to plane
Answer» I HOPE that HELPS you.

Discussion

22.	Describe the 12 hour method of noting the time
Answer» The 12 hour METHOD of clock is nothing but how we see the time on the clock But when we see the clock randomly in a closed room and the clock reads 5:00 o' clock, we do not KNOW if the clock says morning or evening. But the 12 hour clock is improvised. It has specific SYMBOLS for morning and evening that is a.m and p.m a.m means morning after midnight 12:00 o' clock and before afternoon 12:00 o' clock. p.m means evening after afternoon 12:00 o' clock and before midnight 12:00 o ' clock.

22.

Describe the 12 hour method of noting the time

Answer»

The 12 hour METHOD of clock is nothing but how we see the time on the clock

But when we see the clock randomly in a closed room and the clock reads 5:00 o' clock, we do not KNOW if the clock says morning or evening.

But the 12 hour clock is improvised.

It has specific SYMBOLS for morning and evening that is a.m and p.m

a.m means morning after midnight 12:00 o' clock and before afternoon 12:00 o' clock.

p.m means evening after afternoon 12:00 o' clock and before midnight 12:00 o ' clock.

Discussion

23.	The pressure exerted by a wooden pole of diameter of 20cm on the ground is 40pa.Calculatw the force
Answer» The PRESSURE exerted by a WOODEN pole of DIAMETER of 20cm on the GROUND is 40pa.Calculatw the force HOPE THIS ANSWER HELP YOU PLEASE MAKE ME BRAINLIST

Discussion

24.	The leave Marigold plant appears green but the flower appear yellow when seen in the white sunlight. give reason
Answer» SURE the MARIGOLD PLANT appear green because their CELLS contain chloroplast

Discussion

25.	What is universal constant
Answer» Physical CONSTANT. ... A physical constant, sometimes FUNDAMENTAL physical constant or universal constant, is a physical QUANTITY that is GENERALLY believed to be both universal in NATURE and have constant value in time.

Discussion

26.	car moves with a speed of 30 km/Mr for half an hour, 25 km/h' for one hour and 40 km/h for two hours. Calculate average speed of the car
Answer» $\huge\boxed{Answer}$ ------- In the first case , the car travels at a speed of 30km/hr for a time of 0.5 hour. Now, Speed = $\frac{<klux>DISTANCE</klux>}{Time}$ So , 30 = $\frac{distance}{0.5}$ Therefore, Distance = 30 × 0.5 = 15km ..............(1) In the second case , the car travels at a speed of 25km/hr for a time of 1 hour. Since, Speed = $\frac{Distance}{Time}$ So , $25 = \frac{distance}{1}$ Therefore, Distance = 25 × 1 = 25km .............(2) In the THIRD case , the car travels at a speed of 40km/hr for a time of 2 hours. Since , Speed = $\frac{Distance}{Time}$ So, $40 = \frac{distance}{2}$ Therefore, Distance = 40 × 2 = 80km ...........(3) By combining EQUATIONS, (1),(2), and (3) , we get ... Total Distance covered = 15 + 25 + 80 = 120 km. Total time taken = 0.5 + 1 + 2 = 3.5 hours. Therefore, Average speed = $\frac{Total\:distance\:travelled}{Total\:time\:taken}$ $= \frac{120}{3.5}$ $= 34.28$ Therefore , Average Speed = 34.28km/hr. $\huge\mathcal{Be\:Brainly}$

Discussion

27.	Which wave properties determines (a) loudness, (b) pitch ?
Answer» Loudness is FREQUECY wave but pitch is AMPLITUDE wave HOPE it helps

Discussion

28.	The coin fell in the beaker due to the property of the coin called
Answer» the case of the COIN DROP activity, the penny is at rest SITTING on top of the card. Watch it as long as you LIKE but, on it’s own, the penny will not move from that spot. When you flick the card out from under the penny, you allow gravity (an outside force) to act on it and drop it into the glass. The bottom of the glass stops the penny from falling. However, if the penny were a lot heavier (had more mass) and were falling much faster, it could GO right through the glass (and probably the table supporting it, too). Read more on Brainly.in - brainly.in/question/4480138#readmore

28.

The coin fell in the beaker due to the property of the coin called

Answer»

the case of the COIN DROP activity, the penny is at rest SITTING on top of the card. Watch it as long as you LIKE but, on it’s own, the penny will not move from that spot. When you flick the card out from under the penny, you allow gravity (an outside force) to act on it and drop it into the glass. The bottom of the glass stops the penny from falling. However, if the penny were a lot heavier (had more mass) and were falling much faster, it could GO right through the glass (and probably the table supporting it, too).

Read more on Brainly.in - brainly.in/question/4480138#readmore

Discussion

29.	The natural gas is compressed in a cng cylinder at a pressure of
Answer» 20-25MpA MIGHT be it's ANSWER

Discussion

30.	A concave mirror forms a real image of an object placed in front of it at a distance 30 cm,of size three times the size of object . Find the focal length of mirror and position of image
Answer» I HOPE it HELPS MATE

Discussion

31.	Write examples of Bernoulli's theoram
Answer» this PRINCIPLE explains why airplane wings are curved along the top and why ships have to steer away from each other as they pass. The pressure above the wing is lower than below it, providing lift from UNDERNEATH the wing. please MARK as BRAINliest ANSWER

Discussion

32.	In two beakersA and B 50 ml water of about 70 degree celsius is taken then in beaker A 50 ml of water of about 30 degree Celsius is added and after 5 minutes in Beaker B 50 ml of water of about 30 degree Celsius is added What observe if the temperatures of both beakers recorded immediately why
Answer» Hii DEAR, # Answer- BEAKER B will will be hotter than beaker A # Explanation- We all know that heat flows from higher temperature to lower temperature. And rate if heat transfer depends on temperature difference. # A)For beaker A, We put 30°C water in 70°C water, the temperature difference is big so water will cool down immediately and for FIVE MINUTES it'll cool against difference with room temperature. # B)For beaker B, We wait for 5 minutes with 70°C water in room, so that'll cool it slowly. ALSO afer 5 minutes we'll add 30°C water to it, but temperature difference will be small so cooling will be pretty slow. Thus if we measure temperature immediately after 5 minutes, beaker B will will be hotter than beaker A. Thanks for asking...

Discussion

33.	Derive an expression for the escape velocity of an object from the Earth surface
Answer» Answer: Refer the attachment for diagram. Let us CONSIDER the earth to be a sphere with centre O, RADIUS R and mass M. Let the mass of the OBJECT PROJECTED be having a mass 'm' which is projected from Point A from the sphere. Let us extend the path of OA and mark points P and Q such that, OP = x and PQ = dx in length. Let the minimum velocity required for escaping be v₀, then the kinetic energy of the object is: ⇒ K.E = 1/2 mv₀² When the object projected is at point P, the gravitational force between object and the earth is given by: $\bf{ F = \dfrac{GMm}{x^2} }$ Work done by body in moving against gravitational force is given by: $\bf{ dW = F.dx}\\\\\\\bf{dW = \dfrac{GMm}{x^2}.dx}$ The total work done in taking the object from radius of the earth to infinity can be found by integrating the equation. $\bf{W = \int\limits^\infty_R{dW} = \int\limits^\infty_R {\frac{GMm}{x^2}} .\, dx$ On simplifying the equation we get, $\bf{ W = -GMm [\:\dfrac{1}{\infty} - \dfrac{1}{R} \:]$ $\bf{\dfrac{1}{\infty}\: \textbf{can be approximated to 0 and we get,}$ $\implies \bf{ W = \dfrac{GMm}{R} }$ To escape the gravitational pull, the work done must be equal to Kinetic energy of the body. $\implies \bf{ \dfrac{1}{2} mv_0\:^{2} = \dfrac{GMm}{R} }$ 'm' gets cancelled on both sides and we get, $\implies \bf{ \dfrac{v_0\:^{2} }{2} = \dfrac{GM}{R}$ $\implies \bf{ v_0 = \sqrt{ \dfrac{2GM}{R} }$ $\textbf{We know that,} \\\\\implies \bf{ g = \dfrac{GM}{R}$ Hence substituting we get, $\implies \bf{ v_o = \sqrt{2gR} \implies \sqrt{ 2 \times 9.8 \times 6.4 \times 10^6} \implies 11.2 \times 10^3 m/s$ Which can be simplified as 11.2 km/sec Hence Derived !

33.

Derive an expression for the escape velocity of an object from the Earth surface

Answer»

Answer:

Refer the attachment for diagram.

Let us CONSIDER the earth to be a sphere with centre O, RADIUS R and mass M. Let the mass of the OBJECT PROJECTED be having a mass 'm' which is projected from Point A from the sphere.

Let us extend the path of OA and mark points P and Q such that, OP = x and PQ = dx in length.

Let the minimum velocity required for escaping be v₀, then the kinetic energy of the object is:

⇒ K.E = 1/2 mv₀²

When the object projected is at point P, the gravitational force between object and the earth is given by:

$\bf{ F = \dfrac{GMm}{x^2} }$

Work done by body in moving against gravitational force is given by:

$\bf{ dW = F.dx}\\\\\\\bf{dW = \dfrac{GMm}{x^2}.dx}$

The total work done in taking the object from radius of the earth to infinity can be found by integrating the equation.

$\bf{W = \int\limits^\infty_R{dW} = \int\limits^\infty_R {\frac{GMm}{x^2}} .\, dx$

On simplifying the equation we get,

$\bf{ W = -GMm [\:\dfrac{1}{\infty} - \dfrac{1}{R} \:]$

$\bf{\dfrac{1}{\infty}\: \textbf{can be approximated to 0 and we get,}$

$\implies \bf{ W = \dfrac{GMm}{R} }$

To escape the gravitational pull, the work done must be equal to Kinetic energy of the body.

$\implies \bf{ \dfrac{1}{2} mv_0\:^{2} = \dfrac{GMm}{R} }$

'm' gets cancelled on both sides and we get,

$\implies \bf{ \dfrac{v_0\:^{2} }{2} = \dfrac{GM}{R}$

$\implies \bf{ v_0 = \sqrt{ \dfrac{2GM}{R} }$

$\textbf{We know that,} \\\\\implies \bf{ g = \dfrac{GM}{R}$

Hence substituting we get,

$\implies \bf{ v_o = \sqrt{2gR} \implies \sqrt{ 2 \times 9.8 \times 6.4 \times 10^6} \implies 11.2 \times 10^3 m/s$

Which can be simplified as 11.2 km/sec

Hence Derived !

Discussion

34.	Please help! This is a multiple answer question. (photo attached)
Answer» Work=power/time power=work×time Time=work/power

Discussion

35.	If a person of mass 60 kg went to the Moon, thena)Is there any change in his Mass and Weight ? b)What will be his weight on the Earth ?
Answer» There is a change in weight and MAN of 60KG in MOON is 10kg in EARTH 60kg

Discussion

36.	Give two instances where the body is being displaced but there is no work done in this process
Answer» first instance : when an object moves from POINT A goes to point B then comes back at a point A .. in this the displacement is 0.. so the WORK DONE is zero. second instance : when the force is PERPENDICULAR to the direction of motion . hope you got your answer.

36.

Give two instances where the body is being displaced but there is no work done in this process

Answer»

first instance : when an object moves from POINT A goes to point B then comes back at a point A .. in this the displacement is 0.. so the WORK DONE is zero.

second instance : when the force is PERPENDICULAR to the direction of motion .

hope you got your answer.

Discussion

37.	Two resistors are joined in parallel having equivalent resistance 6/5 ohm. If one of the resistancewire is breaks then effective resistance become 2 ohm. Find the resistance of the wire that break:(A) 35 (B) 2(C) 65 (D) 3 Ω
Answer» Let the resistance of the wire that BREAKS be r . Let the equivalent resistance be R and the second resistor that is joined with 'r' be r₁ . As the resistors are connected in parallel : 1/R = 1/r + 1/r₁ = > 1/(6/5) = 1/r + 1/r₁ = > 5/6 = 1/r + 1/r₁ = > 1/r = 5/6 - 1/r₁ . If one of the resistance breaks then the effective resistance breaks . The resistance of 'r' is broken and hence there is only one resistor connected in the CIRCUIT . The resistance of the wire becomes 2 ohms which tells us that the other resistor has a resistance of 2 ohms . Putting r₁ = 2 in that EQUATION , we get : 5 / 6 Ω = 1 / r + 1 / 2 Ω = > 5 / 6 Ω = ( 2 + r ) / 2 r = > 10 r = 12 Ω + 6 r = > 10 r - 6 r = 12 Ω = > 4 r = 12 Ω = > r = 12/4 Ω = > r = 3 Ω The resistance of the wire that break is 3 Ω . NOTE : When the resistors are in parallel , the equivalent resistance denoted by R will be R = 1/R₁ + 1/R₂ where R₁ and R₂ are the resistances connected in parallel . When the resistors are in series , the equivalent resistance denoted by R will be R = R₁ + R₂ where R₁ and R₂ are the resistances connected in series .

37.

Two resistors are joined in parallel having equivalent resistance 6/5 ohm. If one of the resistancewire is breaks then effective resistance become 2 ohm. Find the resistance of the wire that break:(A) 35 (B) 2(C) 65 (D) 3 Ω

Answer»

Let the resistance of the wire that BREAKS be r .

Let the equivalent resistance be R and the second resistor that is joined with 'r' be r₁ .

As the resistors are connected in parallel :

1/R = 1/r + 1/r₁

= > 1/(6/5) = 1/r + 1/r₁

= > 5/6 = 1/r + 1/r₁

= > 1/r = 5/6 - 1/r₁ .

If one of the resistance breaks then the effective resistance breaks .

The resistance of 'r' is broken and hence there is only one resistor connected in the CIRCUIT .

The resistance of the wire becomes 2 ohms which tells us that the other resistor has a resistance of 2 ohms .

Putting r₁ = 2 in that EQUATION , we get :

5 / 6 Ω = 1 / r + 1 / 2 Ω

= > 5 / 6 Ω = ( 2 + r ) / 2 r

= > 10 r = 12 Ω + 6 r

= > 10 r - 6 r = 12 Ω

= > 4 r = 12 Ω

= > r = 12/4 Ω

= > r = 3 Ω

The resistance of the wire that break is 3 Ω .

NOTE :

When the resistors are in parallel , the equivalent resistance denoted by R will be R = 1/R₁ + 1/R₂ where R₁ and R₂ are the resistances connected in parallel .

When the resistors are in series , the equivalent resistance denoted by R will be R = R₁ + R₂ where R₁ and R₂ are the resistances connected in series .

Discussion

38.	An example for resistance in series
Answer» The USE of FUSE , AMMETER in a CIRCUIT

Discussion

39.	Give me the answer quickly.
Answer» I THINK so the ANSWER is 1

Discussion

40.	Friction is evil or not
Answer» Hey mate ur answer is friction is a friendly evil . advantages of friction =it helps us to draw =it helps us to write on a paper =it helps us to WALK without skidding of disadvantages of friction =it causes wear and tear =it releases heat =it waste energy =it reduces the EFFICIENCY of a FUEL hope it helps you be brainly

Discussion

41.	Four speed and time graphs are shown below
Answer» Where....................

Discussion

42.	Relationship between drift velocity and current in vector notation
Answer» drift VELOCITY = v we KNOW , a = F/m a = qE/m where Q = e a = -eE/m v = (-eE/m)t I = n e A v I = n e A ( -e E/m) t I = n e^2 A E t /m

42.

Relationship between drift velocity and current in vector notation

Answer»

drift VELOCITY = v

we KNOW ,

a = F/m

a = qE/m

where Q = e

a = -eE/m

v = (-eE/m)t

I = n e A v

I = n e A ( -e E/m) t

I = n e^2 A E t /m

Discussion

43.	When stone is raised from height, u = 0?
Answer» When stone will in 90 DEGREE in upward DIRECTION. It MEANS when stone will perpendicular.

Discussion

44.	Why the virtual image cannot be photographed
Answer» virtual image is FORMED behind the SURFACE of mirror so , cant be obtained on PHOTOGRAPHIC PLATE

Discussion

45.	Why spherical lens has two focus?
Answer» Hey mate here is your answer》》 The reason why a lens has two focii while a MIRROR has only one is because of the fact that light is transmitted through a lens and not a mirror. Unlike in MIRRORS, images in LENSES can form on either SIDE and THUS we require two focii to properly determine the formation and position of an image. Hope this answer will help you..《《

Discussion

46.	What is tha Relationship between focal length and magnification.
Answer» RELATIONSHIP Between Focal LENGTH and MAGNIFICATION M = f/(f-d) Here f is the focal length of the THIN lens and d is the distance between the lens and OBJECT.

46.

What is tha Relationship between focal length and magnification.

Answer»

RELATIONSHIP Between Focal LENGTH and MAGNIFICATION

M = f/(f-d)

Here f is the focal length of the THIN lens and d is the distance between the lens and OBJECT.

Discussion

47.	Explain how conduction happens in a solid
Answer» Sorry, Current does not flow in solid because in solid IONS are not free to MOVE. So the result is conduction does not OCCUR in solid state.

Discussion

48.	What is angular displacement in radiant of a second hand of a clock in 10 seconds?
Answer» Here is the ANSWER of your ASKED QUESTION

Discussion

49.	An object at 5 cm high is placed at a distance of 60 cm in front of concave mirror of focal length 10 cm .Find its position and size of image
Answer» Here U =-60AND f=-10. 1/u +1v=1/f -1/60+1/v=1/-10 1/v=-1/10+1/60 1/v=-6+1/60 1/v=-5/60=-1/12 hence v=-12

Discussion

50.	Name 2 places in india where sundials are located .
Answer» In DELHI Jantar Mantar sundial was located and in Mumbai sundial located that are two PLACES in INDIA where SUNDIALS are located. Hope that answers it's you my dear friends

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is dimension of an dielectric constant?

Temperature of the liquid decreases or increases during evaporation?Please give a reason for your answer.

Dimensional formula of temperature gradient

Is weight a force ?define why

what is the work done by the force of gravity on a satellite moving round the earth ?justify your answer

If the volume is 1 by 4th of the real volume then what will be the effect on density?

The current in a circuit containinga battery connected to 2 ohm resistance is 0.9 a

A bulb is rated 60 W, 240 V. If the same bulb is connected to a 192 V source, the current drawnthrough the bulb is found to be k10Ampere. Find the value of k

Electromagetic induction with primary and secondary coil

What is slinky||||||||||||||||||||||||

Two polarizers are oriented at 34° to one other. Light polarized by 17° angle to the optic axis of the first polarizer. What reduction takes place for the emerging light from the two polarizers. (cos 17°=0.956 and cos34°=0.829) (final answer must be in percentage)

k=100N/cm , M=1 kg initially x=2cm and velocity = 2cm/s find minimum time to achieve maximum elongation and maximum compression

What is meant by the statement the maganefiction produced by a spherical mirror is -2

Imprtance of universal law 4 points very short class9

Which colour shows maximum deviation when light is dispersed through prism

⦁ Is it true or wrong to say that, Vectors always start at the origin? Either yes or no justify it.

Which colour deviate minimum during the dispersion of light through a prism?

Results of the electrical wiring

Velocity of 126 km/hr find distance in 40 min

Explain why atmosphere is not present on the moon

Moment of Inertia perpendicular to plane

Describe the 12 hour method of noting the time

The pressure exerted by a wooden pole of diameter of 20cm on the ground is 40pa.Calculatw the force

The leave Marigold plant appears green but the flower appear yellow when seen in the white sunlight. give reason

What is universal constant

car moves with a speed of 30 km/Mr for half an hour, 25 km/h' for one hour and 40 km/h for two hours. Calculate average speed of the car

Which wave properties determines (a) loudness, (b) pitch ?

The coin fell in the beaker due to the property of the coin called

The natural gas is compressed in a cng cylinder at a pressure of

A concave mirror forms a real image of an object placed in front of it at a distance 30 cm,of size three times the size of object . Find the focal length of mirror and position of image

Write examples of Bernoulli's theoram

In two beakersA and B 50 ml water of about 70 degree celsius is taken then in beaker A 50 ml of water of about 30 degree Celsius is added and after 5 minutes in Beaker B 50 ml of water of about 30 degree Celsius is added What observe if the temperatures of both beakers recorded immediately why

Derive an expression for the escape velocity of an object from the Earth surface

Which can be simplified as 11.2 km/sec

Please help! This is a multiple answer question. (photo attached)

If a person of mass 60 kg went to the Moon, thena)Is there any change in his Mass and Weight ? b)What will be his weight on the Earth ?

Give two instances where the body is being displaced but there is no work done in this process

Two resistors are joined in parallel having equivalent resistance 6/5 ohm. If one of the resistancewire is breaks then effective resistance become 2 ohm. Find the resistance of the wire that break:(A) 35 (B) 2(C) 65 (D) 3 Ω

An example for resistance in series

Give me the answer quickly.

Friction is evil or not

Four speed and time graphs are shown below

Relationship between drift velocity and current in vector notation

When stone is raised from height, u = 0?

Why the virtual image cannot be photographed

Why spherical lens has two focus?

What is tha Relationship between focal length and magnification.

RELATIONSHIP Between Focal LENGTH and MAGNIFICATION

M = f/(f-d)

Here f is the focal length of the THIN lens and d is the distance between the lens and OBJECT.

Explain how conduction happens in a solid

What is angular displacement in radiant of a second hand of a clock in 10 seconds?

An object at 5 cm high is placed at a distance of 60 cm in front of concave mirror of focal length 10 cm .Find its position and size of image

Name 2 places in india where sundials are located .