67486 + Interview Questions in Secondary School in Physics

1.	F1 and F2, the two unknown forces give a resultant of 80√3 along the y-axis. It is required that F2 must have minimum magnitude. Find the magnitudes of F1 and F2. The angle between the resultant and F1 is 30°.
Answer» EXPLANATION: MAGNITUDE of F1 is 120 Magnitude of F2 is 69.28 If you want it's DIAGRAMMATIC explanation then tell me

1.

F1 and F2, the two unknown forces give a resultant of 80√3 along the y-axis. It is required that F2 must have minimum magnitude. Find the magnitudes of F1 and F2. The angle between the resultant and F1 is 30°.

Answer»

EXPLANATION:

MAGNITUDE of F1 is 120

Magnitude of F2 is 69.28

If you want it's DIAGRAMMATIC explanation then tell me

Discussion

2.	Define the terms used to denote the rate of motion
Answer» Answer: In physics, motion is the change in position of an object with respect to its surroundings in a GIVEN INTERVAL of time. Motion is mathematically described in TERMS of displacement, DISTANCE, velocity, acceleration, and speed. ... Momentum is a quantity which is used for measuring the motion of an object. Explanation:

2.

Define the terms used to denote the rate of motion

Answer»

Answer:

In physics, motion is the change in position of an object with respect to its surroundings in a GIVEN INTERVAL of time. Motion is mathematically described in TERMS of displacement, DISTANCE, velocity, acceleration, and speed. ... Momentum is a quantity which is used for measuring the motion of an object.

Explanation:

Discussion

3.	How many typess of switch.
Answer» ANSWER: There are four TYPES of Switch HOPE IT HELPS YOU❣❣✨✨✌✌

3.

How many typess of switch.

Answer»

ANSWER:

There are four TYPES of Switch

HOPE IT HELPS YOU❣❣✨✨✌✌

Discussion

4.	What is passive components .and examples
Answer» In order for a circuit to be properly called electronic, it MUST contain at least one active device. COMPONENTS incapable of controlling current by means of another electrical signal are called passive devices. Resistors, capacitors, inductors, transformers, and even DIODES are all CONSIDERED passive devices. Examples of passive electronic components are capacitors, resistors, inductors, transformers, and diodes. What is a Resistor? A Resistor is an electrical device that resists the FLOW of electrical current. ... What is a Capacitor? ... What is a Diode? ... What is an Integrated Circuit (IC)? ... What are Transistors?

4.

What is passive components .and examples

Answer»

In order for a circuit to be properly called electronic, it MUST contain at least one active device. COMPONENTS incapable of controlling current by means of another electrical signal are called passive devices. Resistors, capacitors, inductors, transformers, and even DIODES are all CONSIDERED passive devices.

Examples of passive electronic components are capacitors, resistors, inductors, transformers, and diodes.

What is a Resistor? A Resistor is an electrical device that resists the FLOW of electrical current. ...

What is a Capacitor? ...

What is a Diode? ...

What is an Integrated Circuit (IC)? ...

What are Transistors?

Discussion

5.	a wave of frequency thousand travel between x and y a distance of 600 m in 2 second how many wavelengths are there in distance x y
Answer» V=f*WAVELENGTH V=600m/2s=300m/s wavelength =V/f = 300/1000=0.3 METRE

Discussion

6.	What is a question?
Answer» ANSWER: A QUESTION is SOMETHING which REQUIRES an answer

6.

What is a question?

Answer»

ANSWER:

A QUESTION is SOMETHING which REQUIRES an answer

Discussion

7.	What is meaning of Newton’s second law of motion
Answer» ANSWER: jkkknvsdghhhhgggbnkkk

7.

What is meaning of Newton’s second law of motion

Answer»

ANSWER:

jkkknvsdghhhhgggbnkkk

Discussion

8.	A charged 0article is placed in an electric field falls from rest through a distance d in time t if the charge on the particle is doubled the time of fall through the same distance will be
Answer» Answer: Heyy buddy, As we all know Q=It where Q=charge,I=current,t=time Hence, Q is proportional to Time. As the ELECTRIC field and DISTANCE remains the same,Q is only DEPENDENT on t. Therefore, If Q=2Q,t=2t. Hope it HELPS... Explanation:

8.

A charged 0article is placed in an electric field falls from rest through a distance d in time t if the charge on the particle is doubled the time of fall through the same distance will be

Answer»

Answer:

Heyy buddy,

As we all know Q=It where Q=charge,I=current,t=time

Hence,

Q is proportional to Time.

As the ELECTRIC field and DISTANCE remains the same,Q is only DEPENDENT on t.

Therefore,

If Q=2Q,t=2t.

Hope it HELPS...

Explanation:

Discussion

9.	the position of a particle with respect to the time T along y-axis given by Y is equal to 12 square - 2T cube device in metre 30 in second when the particle achieve maximum speed the position of particle will be
Answer» ANSWER: EXPLANATION: THE ANSWER YOU WANT IS HERE

9.

the position of a particle with respect to the time T along y-axis given by Y is equal to 12 square - 2T cube device in metre 30 in second when the particle achieve maximum speed the position of particle will be

Answer»

ANSWER:

EXPLANATION:

THE ANSWER YOU WANT IS HERE

Discussion

10.	You are waiting in line to use the diving board at your local pool. While watching people dive into the pool from the board, you realize that using a diving board to spring into the air before a dive is a good example of newton's third law of motion. Explain how a diving board illustrates newton's third law of motion.
Answer» ANSWER: NEWTON's THIRD LAW of MOTION

10.

You are waiting in line to use the diving board at your local pool. While watching people dive into the pool from the board, you realize that using a diving board to spring into the air before a dive is a good example of newton's third law of motion. Explain how a diving board illustrates newton's third law of motion.

Answer»

ANSWER:

NEWTON's THIRD LAW of MOTION

Discussion

11.	Write the mechanism of clinical thermometers in written
Answer» $\huge\bold{HEY:)-}$ ⭐⭐⭐⭐⭐⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ❤❤❤⭐⭐⭐⭐ $\\ \\ \\ \\ \\$ ⤵⤵⤵⤵ FOLLOW , BRAINLIST ME☺☺PLZZ =========== Thermometers are designed ACCORDING to predefined standards identified by the National Institute of Standards and Technology (NIST, formerly the National Bureau of Standards) and standard manufacturing PRACTICES. Within the regulatory guidelines there are provisions for the custom manufacture of thermometers. Custom thermometers can be as varied as those who use them. Different sizes exist for the amount, WEIGHT, and length of glass used, the type of liquid filled into the glass, the frequency of gradations laid onto the glass tube or enclosure, and even the color of the gradation scale marks. The OPERATING principle of a thermometer is quite simple. A known measure of liquid (mercury, alcohol, or a hydrocarbon-based fluid) is vacuum-sealed in a glass tube. The liquid expands or contracts when air is heated or cooled. As the liquid level changes, a corresponding temperature scale can be read to indicate the current temperature.

11.

Write the mechanism of clinical thermometers in written

Answer»

$\huge\bold{HEY:)-}$

⭐⭐⭐⭐⭐⭐ ⭐ ⭐ ⭐ ⭐ ⭐ ❤❤❤⭐⭐⭐⭐ $\\ \\ \\ \\ \\$

⤵⤵⤵⤵

FOLLOW , BRAINLIST ME☺☺PLZZ

===========

Thermometers are designed ACCORDING to predefined standards identified by the National Institute of Standards and Technology (NIST, formerly the National Bureau of Standards) and standard manufacturing PRACTICES. Within the regulatory guidelines there are provisions for the custom manufacture of thermometers. Custom thermometers can be as varied as those who use them. Different sizes exist for the amount, WEIGHT, and length of glass used, the type of liquid filled into the glass, the frequency of gradations laid onto the glass tube or enclosure, and even the color of the gradation scale marks.

The OPERATING principle of a thermometer is quite simple. A known measure of liquid (mercury, alcohol, or a hydrocarbon-based fluid) is vacuum-sealed in a glass tube. The liquid expands or contracts when air is heated or cooled. As the liquid level changes, a corresponding temperature scale can be read to indicate the current temperature.

Discussion

12.	Write down the physical, electrical, mechanical properties of at least five polymeric materials.
Answer» ANSWER: Nylon, polyester, polyethylene, teflon and epoxy are 5 polymeric MATERIALS... Nylon is the material which is entirely made out of CHEMICALS... It is used to make garments etc... (There are all many uses just search on goggle about the materials which I have WRITTEN in the above). Hope this HELPED you

12.

Write down the physical, electrical, mechanical properties of at least five polymeric materials.

Answer»

ANSWER:

Nylon, polyester, polyethylene, teflon and epoxy are 5 polymeric MATERIALS...

Nylon is the material which is entirely made out of CHEMICALS... It is used to make garments etc...

(There are all many uses just search on goggle about the materials which I have WRITTEN in the above).

Hope this HELPED you

Discussion

13.	Write the names of the satellites launched by india and the purpose of sending them
Answer» Answer: BHAI NET pe SEARCH MAR LE

13.

Write the names of the satellites launched by india and the purpose of sending them

Answer»

Answer:

BHAI NET pe SEARCH MAR LE

Discussion

14.	Can u pls answer this
Answer» Friction FORCE in BACKWARD direction gravitational force in downward direction force exerted by aeroplanes in front

Discussion

15.	V2V 2A particle moves along a straight line such that itsdisplacement at any time? is given by S = -31 + 2m.The displacement when the acceleration became zeroisa) Om (b) 2 m (e) 3 m (d) -2 m.
Answer» Answer: c is correct answer mark as BRAINLEAST PLEASE

15.

V2V 2A particle moves along a straight line such that itsdisplacement at any time? is given by S = -31 + 2m.The displacement when the acceleration became zeroisa) Om (b) 2 m (e) 3 m (d) -2 m.

Answer»

Answer:

c is correct answer

mark as BRAINLEAST PLEASE

Discussion

16.	Write about the radio instruments used in aircraft
Answer» ANSWER: RADAR................

16.

Write about the radio instruments used in aircraft

Answer»

ANSWER:

RADAR................

Discussion

17.	Why yielding stress increase with strain hardening?
Answer» ANSWER: Materials behave elastically until the deforming force INCREASES beyond the elastic LIMIT, which is ALSO known as the yield stress. At that point, the material is permanently deformed and fails to RETURN to its original shape when the force is removed. This phenomenon is called plastic deformation. I guess this is helpful

17.

Why yielding stress increase with strain hardening?

Answer»

ANSWER:

Materials behave elastically until the deforming force INCREASES beyond the elastic LIMIT, which is ALSO known as the yield stress. At that point, the material is permanently deformed and fails to RETURN to its original shape when the force is removed. This phenomenon is called plastic deformation.

I guess this is helpful

Discussion

18.	Work done by frictional force is positive ,negative and zero
Answer» NEGATIVE.................

Discussion

19.	Why solids and liquids together taken as condensed states of matter?
Answer» Answer: Due to the PRESENCE of much SMALLER SPACES AMONGST the particles of solids and liquids as compared to those in GASES ,the Solids and liquids are collectively called condensed phase of matter. solids and liquids are collectively known as condensed states of matter.

19.

Why solids and liquids together taken as condensed states of matter?

Answer»

Answer:

Due to the PRESENCE of much SMALLER SPACES AMONGST the particles of solids and liquids as compared to those in GASES ,the Solids and liquids are collectively called condensed phase of matter. solids and liquids are collectively known as condensed states of matter.

Discussion

20.	Find Dimension of x ify=tan(xt). where t is time
Answer» ANSWER: s-¹. Explanation: TRIGONOMETERIC functions are DIMENSIONLESS Y=dimension LESS [X] = 1/[T] →[x] = sec-¹

20.

Find Dimension of x ify=tan(xt). where t is time

Answer»

ANSWER:

s-¹.

Explanation:

TRIGONOMETERIC functions are DIMENSIONLESS

Y=dimension LESS

[X] = 1/[T]

→[x] = sec-¹

Discussion

21.	This is one of the world's most recognizable structures. Can you save Hangman and choose the correct letters?FIFISSFO
Answer» ANSWER: It wouls NONE of the above But FF

21.

This is one of the world's most recognizable structures. Can you save Hangman and choose the correct letters?FIFISSFO

Answer»

ANSWER:

It wouls NONE of the above

But FF

Discussion

22.	Why ray of light reflect when come from one medium to another medium?
Answer» Answer: hay , it should not be reflect. It should be refract. Explanation: While entering from one medium to DIFFRENT medium. There is difference in DENCITY and volume in both the media , which cases bend of LIGHT rays. THEREFORE, light rays refract while entering from one medium to another. --------"Amannn"----------

22.

Why ray of light reflect when come from one medium to another medium?

Answer»

Answer:

hay , it should not be reflect. It should be refract.

Explanation:

While entering from one medium to DIFFRENT medium. There is difference in DENCITY and volume in both the media , which cases bend of LIGHT rays.

THEREFORE, light rays refract while entering from one medium to another.

--------"Amannn"----------

Discussion

23.	Why reserve torque is high for diesel engine than petrol?
Answer» few major REASONS for higher torque production in diesel engines: The compression ratio of normal diesel engines is higher than that of its gasoline COUNTERPARTS. ... A diesel engine compresses AIR to such a high pressure and temperature that FUEL gets IGNITED automatically with no need for a spark..

Discussion

24.	Why multicylinder engine has lighter flywheel than single cylinder engine?
Answer» Answer: here's your Answer Explanation: In a single CYLINDER engine, merely one power stroke for every two revolution of CRANKSHAFT, WHEREAS in multi cylinder engine the power stroke is given by number of cylinders. So that in Single cylinder engine there is more ROTATIONAL energy required which is given by heavier flywheel. ... so, it has lighter flywheel. --------"Amannn"----

24.

Why multicylinder engine has lighter flywheel than single cylinder engine?

Answer»

Answer:

here's your Answer

Explanation:

In a single CYLINDER engine, merely one power stroke for every two revolution of CRANKSHAFT, WHEREAS in multi cylinder engine the power stroke is given by number of cylinders. So that in Single cylinder engine there is more ROTATIONAL energy required which is given by heavier flywheel. ... so, it has lighter flywheel.

--------"Amannn"----

Discussion

25.	Why pumps are generally less efficient than turbines?
Answer» EXPLANATION: Pumps increases the energy of fuel whereas turbine decreases it.Hydraulically the pump in turbine mode will gave no more efficiency as they are CAPABLE of handling more fluid.A pump can GET efficiency as high ASA almost 90% but a turbine or compresser is nowwhere near as efficient.

25.

Why pumps are generally less efficient than turbines?

Answer»

EXPLANATION:

Pumps increases the energy of fuel whereas turbine decreases it.Hydraulically the pump in turbine mode will gave no more efficiency as they are CAPABLE of handling more fluid.A pump can GET efficiency as high ASA almost 90% but a turbine or compresser is nowwhere near as efficient.

Discussion

26.	Why we use crystal oscillator in greenhouse project?
Answer» Answer: we USE crystal OSCILLATOR in greenhouse project because crystals have POWER to do this WORK.

26.

Why we use crystal oscillator in greenhouse project?

Answer»

Answer:

we USE crystal OSCILLATOR in greenhouse project because crystals have POWER to do this WORK.

Discussion

27.	13. What will happen to the resistance of the circuit, if the current it is doubled?
Answer» ANSWER: If you are doubling the current, either you are doing it by INCREASING the VOLTAGE or by decreasing the resistance or by a combination of both. So the resistance will remain constant if current is DOUBLED through doubling the voltage supply please MARK it as brainliest

27.

13. What will happen to the resistance of the circuit, if the current it is doubled?

Answer»

ANSWER:

If you are doubling the current, either you are doing it by INCREASING the VOLTAGE or by decreasing the resistance or by a combination of both. So the resistance will remain constant if current is DOUBLED through doubling the voltage supply

please MARK it as brainliest

Discussion

28.	The external diameter of a 5 metre long hollow tube is 10cm and the thickness of its wall is 5mm. If the specific resistance of copper be 1.7*10 ki power -5 ohm metre, then determine its resistance.solve it fast !!
Answer» GIVEN, $r_{1} = 4.<klux>5</klux>10^{-2} m\\\\r_{2}= 510^{-2}m$ $\rho = 1.710^{-5} ohm m.$ l = 5 m. Let the cross section area of the TUBE be A. We KNOW, A = $\pi(r_{2}^{2} - r_{1}^{2})$ on PUTTING the values, $A = 3.14[(510^{-2})^{2}-(4.510^{-2})^{2}]$ = $14.910^{-4}m^{2}$ ∴ $\rho\frac{l}{A}$ Resistance =* on putting the values, = $\frac{1.710^{-5}5}{14.910^{-4}}$ = 0.57 $10^{-1}$ = 0.057 ohm.

28.

The external diameter of a 5 metre long hollow tube is 10cm and the thickness of its wall is 5mm. If the specific resistance of copper be 1.7*10 ki power -5 ohm metre, then determine its resistance.solve it fast !!

Answer»

GIVEN,

$r_{1} = 4.<klux>5</klux>*10^{-2} m\\\\r_{2}= 5*10^{-2}m$

$\rho = 1.7*10^{-5} ohm m.$

l = 5 m.

Let the cross section area of the TUBE be A.

We KNOW,

A = $\pi(r_{2}^{2} - r_{1}^{2})$

on PUTTING the values,

$A = 3.14*[(5*10^{-2})^{2}-(4.5*10^{-2})^{2}]$

= $14.9*10^{-4}m^{2}$

∴ $\rho\frac{l}{A}$ Resistance =

on putting the values,

= $\frac{1.7*10^{-5}*5}{14.9*10^{-4}}$

= 0.57* $10^{-1}$

= 0.057 ohm.

Discussion

29.	PRESSURE ENERGY PER UNIT VOLUME OF A LIQUID ?
Answer» Answer: Pressure in a fluid may be considered to be a measure of energy PER unit volume or energy density. ... The most OBVIOUS application is to the HYDROSTATIC pressure of a fluid, where pressure can be used as energy density ALONGSIDE kinetic energy density and potential energy density in the Bernoulli equation. please MARK it as brainliest

29.

PRESSURE ENERGY PER UNIT VOLUME OF A LIQUID ?

Answer»

Answer:

Pressure in a fluid may be considered to be a measure of energy PER unit volume or energy density. ... The most OBVIOUS application is to the HYDROSTATIC pressure of a fluid, where pressure can be used as energy density ALONGSIDE kinetic energy density and potential energy density in the Bernoulli equation.

please MARK it as brainliest

Discussion

30.	Which of the following defines the mass number of an atom answers
Answer» ANSWER: PLZ FULL QUESTION SEND

30.

Which of the following defines the mass number of an atom answers

Answer»

ANSWER:

PLZ FULL QUESTION SEND

Discussion

31.	Three resistors of 2ohm,3ohm,6ohm what is the highest resistance, what is the least resistance and can you make a resistance 4.5ohm using these three draw it
Answer» ANSWER: For HIGHEST Resistance Combine Those three resisters in Series. And For Least Resistance Combine them in Parallel COMBINATION . Please MARK Brainliest

31.

Three resistors of 2ohm,3ohm,6ohm what is the highest resistance, what is the least resistance and can you make a resistance 4.5ohm using these three draw it

Answer»

ANSWER:

For HIGHEST Resistance Combine Those three resisters in Series.

And

For Least Resistance Combine them in Parallel COMBINATION .

Please MARK Brainliest

Discussion

32.	If 3 cos theta + 4 sin theta sin theta + Alpha then value of a and Alpha
Answer» ANSWER: QUESTION is INCOMPLETE with an ERROR

32.

If 3 cos theta + 4 sin theta sin theta + Alpha then value of a and Alpha

Answer»

ANSWER:

QUESTION is INCOMPLETE with an ERROR

Discussion

33.	Why is there a saturation current in photoelectric effect?
Answer» Answer: hey mate✌ Explanation: Saturation current in photoelectric EFFECT. ... current may increase as now the electrons in the wire will be under greater potential difference THEREBY reducing the TIME in which the electrons complete one round to reach the same point again and HENCE increasing current. hope ot helps you

33.

Why is there a saturation current in photoelectric effect?

Answer»

Answer:

hey mate✌

Explanation:

Saturation current in photoelectric EFFECT. ... current may increase as now the electrons in the wire will be under greater potential difference THEREBY reducing the TIME in which the electrons complete one round to reach the same point again and HENCE increasing current.

hope ot helps you

Discussion

34.	Why two electric field lines never cross each other?
Answer» Explanation: Lines of force represent the STRENGTH of the electric field at any given point. ... If the lines cross each other at a given location, then there must be two distinctly different values of electric field with their own individual direction at that given location. This could never be the case and hence they could not intersect each other. Now in the FIGURE, at any point on the electric lines of force we could not have two directions; since that would MEAN that the same vector is pointing towards two different directions (or the same electric field is CREATING its impact in two directions) which is practically not possible. Thus the electric lines of force will never cross each other. Hope It Helps. . .!!

34.

Why two electric field lines never cross each other?

Answer»

Explanation:

Lines of force represent the STRENGTH of the electric field at any given point. ... If the lines cross each other at a given location, then there must be two distinctly different values of electric field with their own individual direction at that given location. This could never be the case and hence they could not intersect each other.

Now in the FIGURE, at any point on the electric lines of force we could not have two directions; since that would MEAN that the same vector is pointing towards two different directions (or the same electric field is CREATING its impact in two directions) which is practically not possible.

Thus the electric lines of force will never cross each other.

Hope It Helps. . .!!

Discussion

35.	Time period of a pendulum is 4 second. Find its length. (g=10m/s^2)
Answer» T^2 = 4 pie^2 L/g 16 = 4 (3.14)^2 L/10 40/9.85 = L 4.06 = L

35.

Time period of a pendulum is 4 second. Find its length. (g=10m/s^2)

Answer»

T^2 = 4 pie^2 L/g

16 = 4 (3.14)^2 L/10

40/9.85 = L

4.06 = L

Discussion

36.	It is given that A = BP. If A = 100 – 0.20, then Bis equal to(1) 10 + 0.20(2) 10 + 0.02(3) 10 + 0.01(4) 10+ 0.1
Answer» I THINK I have GIVEN RIGHT ANSWER (3),10+0.01

36.

It is given that A = BP. If A = 100 – 0.20, then Bis equal to(1) 10 + 0.20(2) 10 + 0.02(3) 10 + 0.01(4) 10+ 0.1

Answer»

I THINK I have GIVEN RIGHT ANSWER

(3),10+0.01

Discussion

37.	Why is cone clutch is more effctive than plate clutch?
Answer» Plate clutch: Single plate clutch is commonly used in cars and light vehicles. It has only one clutch plate fixed on the splines of the clutch shaft. A flywheel is mounted on the crank shaft of the engine. A PRESSURE plate is connected to the flywheel though the bolts and clutch spring. It is free to slide on the clutch shaft with the MOVEMENT of clutch pedal. When the clutch pedal is in engaged position, the clutch plate remains gripped between flywheel and pressure plate. Friction lines are provided on both side of the clutch plate. One side of the clutch plate is in touch with fly wheel and other side with pressure plate.Due to friction on both sides, the clutch plate revolves with engine flywheel. Therefore, clutch transmits engine power to clutch shaft. Clutch shaft is connected to gear box or transmission of the automobile. Thus clutch transmits power from engine to transmission system which intern rotates wheel of engine. Cone clutch: Cone clutches are generally now only used in low peripheral speed applications although they were once common in automobiles and other combustion engine transmissions They are usually now confined to very specialist transmissions in racing, rallying, or in extreme off-road vehicles, although they are common in power boats. A cone clutch serves the same PURPOSE as a DISK or plate clutch. However, instead of MATING two spinning disks, the cone clutch uses two conical surfaces to transmit friction and torque. The cone clutch transfers a higher torque than plate or disk clutches of the same size due to the wedging action and increased surface area.

37.

Why is cone clutch is more effctive than plate clutch?

Answer»

Plate clutch:

Single plate clutch is commonly used in cars and light vehicles.

It has only one clutch plate fixed on the splines of the clutch shaft. A flywheel is mounted on the crank shaft of the engine.

A PRESSURE plate is connected to the flywheel though the bolts and clutch spring.

It is free to slide on the clutch shaft with the MOVEMENT of clutch pedal.

When the clutch pedal is in engaged position, the clutch plate remains gripped between flywheel and pressure plate. Friction lines are provided on both side of the clutch plate.

One side of the clutch plate is in touch with fly wheel and other side with pressure plate.Due to friction on both sides, the clutch plate revolves with engine flywheel. Therefore, clutch transmits engine power to clutch shaft.

Clutch shaft is connected to gear box or transmission of the automobile. Thus clutch transmits power from engine to transmission system which intern rotates wheel of engine.

Cone clutch:

Cone clutches are generally now only used in low peripheral speed applications although they were once common in automobiles and other combustion engine transmissions

They are usually now confined to very specialist transmissions in racing, rallying, or in extreme off-road vehicles, although they are common in power boats.

A cone clutch serves the same PURPOSE as a DISK or plate clutch.

However, instead of MATING two spinning disks, the cone clutch uses two conical surfaces to transmit friction and torque.

The cone clutch transfers a higher torque than plate or disk clutches of the same size due to the wedging action and increased surface area.

Discussion

38.	Why does soap decrease the surface tension of water?
Answer» ANSWER: by FORMING colliod they REDUCE SURFACE TENSION

38.

Why does soap decrease the surface tension of water?

Answer»

ANSWER:

by FORMING colliod they REDUCE SURFACE TENSION

Discussion

39.	Why do materials have different melting and boiling points?
Answer» Answer: Explanation: Because different material have different force of attraction between atoms and THUS REQUIRE different amount of energy to OVERCOME these forces of attractions.

39.

Why do materials have different melting and boiling points?

Answer»

Answer:

Explanation:

Because different material have different force of attraction between atoms and THUS REQUIRE different amount of energy to OVERCOME these forces of attractions.

Discussion

40.	Why do electrostatic field lines not form closed loops?
Answer» Electric FIELD lines flow from positive to negative charge thus never come back to the positive charge. THEREFORE they do not form a CLOSED loop. This can be considered as a straight one way road.Whereas MAGNETIC lines form closed loops because they come back at the same pole from which they ORIGINATE...

Discussion

41.	Why does charge stay on the surface of a conductor?
Answer» In all conductors, charges RESIDE on the surface. The reason for this is that conductors have FREE electrons, that is, the electrons are loosely attached to the nucleus of the atoms in the conductors. ... So the NET field INSIDE the conductor is ZERO...

Discussion

42.	What are parallel vectors
Answer» Parallel VECTORS Two vectors A and B are parallel if and only if they are scalar multiples of ONE another. A = k B , k is a constant not equal to zero. Let A = (AX , Ay) and B = (Bx , By) A and B are parallel if and only if A = k B (Ax , Ay) = k (Bx , By) = (k Ax , k By) Ax = k Bx and Ay = k By or Ax / Bx = k and Ay / By = k Condition under which vectors A = (Ax , Ay) and B = (Bx , By) are parallel is given by Ax / Bx = Ay / By or Ax By = Bx Ay

42.

What are parallel vectors

Answer»

Parallel VECTORS

Two vectors A and B are parallel if and only if they are scalar multiples of ONE another.

A = k B , k is a constant not equal to zero.

Let A = (AX , Ay) and B = (Bx , By)

A and B are parallel if and only if A = k B

(Ax , Ay) = k (Bx , By) = (k Ax , k By)

Ax = k Bx and Ay = k By or Ax / Bx = k and Ay / By = k

Condition under which vectors A = (Ax , Ay) and B = (Bx , By) are parallel is given by

Ax / Bx = Ay / By or Ax By = Bx Ay

Discussion

43.	It correct to say that a rainbowbos always formed in direcdirection opposite to sun
Answer» The sun is ALWAYS in the opposite PART of the sky from the center of the rainbow. This is because a rainbow is actually just sunlight which has been refracted and reflected. Refraction occurs when the sunlight enters and leaves the small SPHERICAL WATER droplets that constitute the mist.

Discussion

44.	Formula for centripetal force
Answer» CENTRIPETAL FORCE = mv^2/r or V= WR centripetal force= mw^2r

Discussion

45.	Which colour of the light has the longest wavelength? (1) red (2) blue (3) green (4) violet?
Answer» ANSWER:red Explanation:

45.

Which colour of the light has the longest wavelength? (1) red (2) blue (3) green (4) violet?

Answer»

ANSWER:red

Explanation:

Discussion

46.	When two waves of same frequency and same amplitude travelling in opposite directions in a straight line overlaps they give rise to: 1) beats 2) interference 3) stationary waves 4) harmonics 5) none of these?
Answer» ANSWER: interferance Explanation:

46.

When two waves of same frequency and same amplitude travelling in opposite directions in a straight line overlaps they give rise to: 1) beats 2) interference 3) stationary waves 4) harmonics 5) none of these?

Answer»

ANSWER:

interferance

Explanation:

Discussion

47.	Why 2 flat metal surfaces stick together when pressed?
Answer» ANSWER: DUE to DIFFERENT charages

47.

Why 2 flat metal surfaces stick together when pressed?

Answer»

ANSWER: DUE to DIFFERENT charages

Discussion

48.	Why do diesel engines have problems starting in cold weather?
Answer» Diesel won't start when it's cold – could be Glow Plugs. Cold weather, especially extreme cold weather, causes HAVOC with your diesel engine ignition system. ... Diesel engines do not have spark plugs to IGNITE the fuel. The fuel in a diesel engine is ignited by COMPRESSION of the AIR in the cylinder...

Discussion

49.	Why conductivity of material decreases with increasing grain size?
Answer» ANSWER:Because SURFACE AREA KEEP on INCREASING

49.

Why conductivity of material decreases with increasing grain size?

Answer»

ANSWER:Because SURFACE AREA KEEP on INCREASING

Discussion

50.	Why it is dangerous to jump from a fast moving bus?
Answer» ANSWER: Because when we jump from bus the motion of bus is still inside us with great VELOCITY and we APPLY FORCE to stop INITIAL velocity by which we can fall down and have injury

50.

Why it is dangerous to jump from a fast moving bus?

Answer»

ANSWER:

Because when we jump from bus the motion of bus is still inside us with great VELOCITY and we APPLY FORCE to stop INITIAL velocity by which we can fall down and have injury

Discussion

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