Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

3401.

A uniform rod of mass m and length | hinged at point O and a point mass m is fixed at its other end as shown in figure if rod is released from horizontal position, then what is the velocity of the point mass when rod becomes vertical?ANSWER WITH EXPLANATION#No Spamming Plz​

Answer»

Solution :

⏭ Given:

✏ A UNIFORM rod of MASS m and length L hinged at point O and a point mass m is fixed at its other end.

✏ Rod is released from horizontal position.

⏭ To Find:

✏ Velocity of point mass when rod becomes vertical.

⏭ Concept:

✏ This question is completely based on concept of energy conservation.

⏭ Diagram:

✏ PLEASE see the attached image for BETTER understanding.

⏭ Calculation:

__________________________________

\implies \sf \: Distance \: between \: axis \: of \: rotation \\ \sf\:and \: COM \: of \: system = \red{ \frac{3L}{4}}

__________________________________

\implies \sf \:As \: per \: parallel \: axis \: theorem \\ \\ \circ \sf\: M.I. \: related \: to \: point \: mass = \dfrac{m {L}^{2} }{3} + m {L}^{2} \\ \\ \circ \: \boxed{ \tt{ \green{I= \frac{4m {L}^{2} }{3}}}} \: \sf( wrt \: axis \: of \: rotation)

__________________________________

\implies \sf \: \blue{U_i + K_i = U_f + K_f} \\ \\ \implies \sf \: \dfrac{2mg \times 3L}{4} + 0 = 0 + \frac{1}{2} I { \omega}^{2} \\ \\ \implies \sf \: \dfrac{3mgL}{2 } = \frac{1}{2} \times \dfrac{4m {L}^{2} }{3} \times \dfrac{ {v}^{2} }{ {L}^{2} } \\ \\ \implies \sf \: 3gL = \frac{4 {v}^{2} }{3} \\ \\ \implies \sf \: {v}^{2} = \frac{9}{4} \times gL\\ \\ \implies \: \underline{ \boxed{ \tt{ \large{ \orange{v = \frac{3}{2} \sqrt{gL}}}}}} \: \red{ \bigstar}

__________________________________
Discussion
3402.

List the apparatus used to find focal length of a concave mirror?​

Answer»

A Concave Mirror, A Beam Of Light, HOLDER of Mirror , SCALE For MEASURING Distance,.......

PLZZ mark as BRAINLIST follow me follow itz cutie GIRL ❣️❣️
Discussion
3403.

16 J energy is stored in an isolated capacitor. If the capacitor is connected with an uncharged identical capacitor. The final energy stored by each capacitor now should be1) 4 J2) 12 J3) 6 J4) 2 JANSWER WITH EXPLANATION#No Spamming Plz​

Answer»

EXPLANATION:

☢️PLEASE MARK AS BRAINLIEST☢️
Discussion
3404.

Sound can travel through ​

Answer»

ELECTROMAGNET waves

i HOPE it HELPS you
Discussion
3405.

A force F = 3j acts on the rod at a point P(1,0,0). Here centre of rod is taken as origin. Then the torque about O is

Answer»

ANSWER:

hey dude.

this QUESTION can be done when you will apply the right figure and concept......

here you can GO for hcv part 1

...p

please mark my answer as BRAINLIEST

Discussion
3406.

________ is a non-combustible material.

Answer»

Answer:

COMBUSTIBLE substances:- Substances which burn in AIR to PRODUCE HEAT and light are CALLED combustible substances
Discussion
3407.

Where is large hadron collider situated?​

Answer»

Answer:

The LARGE HADRON Collider (LHC) is by far the most powerful particle accelerator built to date. FOLLOWING an upgrade, the LHC now OPERATES at an energy that is 7 times higher than any previous machine! The LHC is based at the European particle physics laboratory CERN, near Geneva in Switzerland.

Explanation:

mark it as brainliiest answer.

please follow meee ☺️
Discussion
3408.

Smallest particles in physics?​

Answer»

ANSWER:

OXYGEN in the I SEEMS it's is

Discussion
3409.

ANSWER THE QUESTION WITH PROPER EXPLANATION#No Spamming Plz​

Answer»

Solution :

Option-B) is correct :

⏭ Concept:

  • If we have Br2 in presence of Fe then we can USE electrophilic addition reaction.
  • After that just draw all the possible resonating STRUCTURES of the given substrate.
  • After that find the place where -ve charge is more STABLE. and FINALLY add Br+ on that place.

✏ Please, refer the attached image for resonance structures.

___________________________

✒ Why α-carbon (In the attachment) has more NEGATIVE charge ??

  • Negative charge from oxygen atom
  • Negative charge from nearest -CH3 group
  • Negative charge from -NH group

➡ [Nice Question] ✌
Discussion
3410.

When a stick of mass m and length | = 0.6 m is released from vertical position (as shown in figure), then what is the velocity of its free end when it strikes the ground?​

Answer»

Answer:

Given:

Stick of MASS m , LENGTH = 0.6 m is released from vertical position.

To FIND:

Velocity of free end when it strikes the ground.

Concept:

The BASIC concept to be used is that : The whole potential energy at vertical position will be converted to Rotational Kinetic Energy in the horizontal position.

Calculation:

Let the free end of rod be v , we know that centre of mass of a rod is at its midpoint. so gravitational force will act at l = 0.3 m.

PE \: = \: KE

= > mg(0.3) = \dfrac{1}{2} I {\omega}^{2}

= > mg(0.3) = \dfrac{1}{2} \times ( \dfrac{m {l}^{2} }{3} ) {\omega}^{2}

We know that ω = v/l , we can say :

= > \cancel mg(0.3) = \dfrac{1}{2} \times ( \dfrac{ \cancel m {l}^{2} }{3} ) \times { (\dfrac{v}{l}) }^{2}

Cancelling all other terms :

= > {v}^{2} = 3 \times 3 \times 2

= > v = 3 \sqrt{2} \: m {s}^{ - 1}

So FINAL answer :

\boxed{ \red{ \huge{ \bold{v = 3 \sqrt{2} \: m {s}^{ - 1} }}}}
Discussion
3411.

Give 2 precautions to be taken while reading a clinical thermometer.Write the temperature range of laboratory thermometer.Write the temperature range of clinical thermometerWhat is the use of kink in the clinical thermometer?Write the normal human temperature in degree Celsius and FahrenheitPlease don't spam me and don't check in internet. Correct answer will be marked as the brainlist answer So don't cheat

Answer»

Answer:

Explanation:

The reading should be taken by keeping the level of mercury along the line of sight.

Before use, the mercury level should be below 35°C.

Wash the THERMOMETER with water or an antiseptic SOLUTION before and after use.

Never hold the thermometer by the bulb while reading it.

It ranges from -10˚C to 110˚C.

The standard ranges in clinical thermometer in 35-45 in CELSIUS and 94 to 108 in Fahrenheit.

Kink in the Mercury thermometer helps to prevents the falling of mercury present in capillary tube into bulb. It ENSURES that the user takes the correct reading of temperature.

Normal human body temperature (NORMOTHERMIA, euthermia) is the typical temperature range found in humans. The normal human body temperature range is typically stated as 36.5–37.5 °C (97.7–99.5 °F).

Hope this will be helpful to you and please mark my answer as the brainleast answer.plz plz plz..........
Discussion
3412.

Why cannot we use magnesium instead of tungsten in a bulb?

Answer»

ANSWER:

We know that metals are good CONDUCTORS of HEAT and electricity. As tungsten is a metal, it is a good conductor of electricity. while,magnesium is a poor conductor .Also, it is very hard and has very high melting point. Because of its high thermal STABILITY and good conductivity properties it has many uses in electronic devices.
Discussion
3413.

Why the tree does not move with a rope after applying tension force?

Answer»

ANSWER:

because there is a GRAVITATIONAL FORCE with it
Discussion
3414.

Why the tree does not move after applying tension force

Answer»

Answer:

This happens because tree has strong roots and with the SUPPORT of GRAVITY , its almost impossible to MOVE a tree without using a VEHICLE
Discussion
3415.

Find the volume of Co2 obtained at STP by heating 50 grams of caco3?( atomic mass of CA is 40 C is 12 16)

Answer»

ANSWER:

The answer is 11.2 L

Explanation:

on heating CaCO₃

CaCO_3 --> CaO + CO_2

1 MOLE of CaCO₃ GIVES 1 mole of CO₂

at STP 1 mole = 22.4 L

given :

50 grams of CaCO₃ is heated .

which is equal to  0.5 mole.

so , 0.5 mole of CaCO₃ gives 0.5 mole of CO₂.

0.5 moles = 11.2 L ( at STP )
Discussion
3416.

Why the tree does not move after applying tension force?

Answer»

ANSWER:

A tree does not move even after APPLYING TENSION force because their roots are holding / have their roots FIXED into tho soil

Explanation:
Discussion
3417.

A scooter travelling at 10 m/s speed up to 20 m/s in 4 sec. Find the acceleration of scooter​

Answer»

Answer:

2.5

Explanation:

u=10

v=20

t=4

v=u+at ,a=v-u/t

a=20-10/4

a=10/4=2.5m/s^2
Discussion
3418.

Define Newton's first law of motion with an example​

Answer»

ANSWER:

NEWTON's first law of motion states that an object at rest remains at rest and an object in motion remains in motion with the same velocity unless acted upon by what we call an unbalanced force. ... The force of GRAVITY pulling down is balanced by the force of my kitchen table PUSHING up on my cup of coffee.

Explanation:

Hope it will Help you.

Mark me as Brainlist.
Discussion
3419.

Physical quantity obtained by dividing displacement with time taken​

Answer»

ANSWER:

Physical quantity obtained by dividing DISPLACEMENT with time taken is velocity.

\rule{200}2

  • The distance covered in GIVEN time is termed as velocity.

  • It is a vector quantity i.e having both magnitude and direction.

  • It can be zero when Displacement is zero [ object comes to its original position or INITIAL one ]

  • The SI unit of velocity is depend upon the units of Displacement and time. It is meter per second. Meter from Displacement and second from time.
Discussion
3420.

answer the following question please. 1) this is the other name for negative acceleration. 2) the speed is said to be 3) this measure the speed of the car. 4) this is the acceleration of the body with uniform velocity. 5) it is the slope of speed. 6) this remains constant in uniform circular.​

Answer»

Answer:

1.  Retardation

2. DISTANCE COVERED by an object PER unit time.

3. nkm/hr

4. 0

5. Acceleration

6.  SPEED and Distance.
Discussion
3421.

Define speed , velocity , acceleration and retaradation​

Answer»

ANSWER:

The rate of CHANGE of motion is CALLED speed

The rate of change of motion in a specified DIRECTION is called velocity

the rate of change of velocity is called acceleration

The negative of acceleration is called retardation
Discussion
3422.

.PhysicsThe multiplication factor of prefix a 10-6s b 10-18s c 16-9s d 10- 5s​

Answer»

ANSWER:

Pittu dadfujjsjfhfyyhnjhhhsizvejxijdjslsjdema

Discussion
3423.

Wher force o 2005(a) 5m²3. A force of 100 N is applied to an objects of ared"objects of area 2m. Calculate the pressure.NOTE:1. Write all definitions with examples from the given not2. Write the answers and solve the numericals given in" Solve the numericals given in the assignment.3. Everything things should be done in separate copy.​

Answer»

Answer:

SORRY I don't this answer

EXPLANATION:

bye goodnight sweet DREAMS

Discussion
3424.

What are the differences between balanced and unbalanced force? give one example for​

Answer»

Answer:

in balanced force , MAGNITUDE of two FORCES is equal

in unbalanced force , magnitude of two forces are unequal

when balanced force is APPLIED it helps the object to remain at rest

Explanation:

please THANK and MARK brainliest
Discussion
3425.

A truck travelling at 54 km/h is slow down to 36 km/h in 10 sec. Find the retardation​

Answer»

Answer:

Hey MATE here is your answer....

INITIAL VELOCITY = 54×5/18 = 15m/s

final velocity = 36×5/18 = 10m/s

Acceleration = 10-15/10 = -5/10 = -2m/s²

Retardation = 2m/s²

Hope it helps you....
Discussion
3426.

How can u prove nature of materials effects specific heat​

Answer»

Answer:

Heat capacity is an extensive property, so it scales with the size of the system. A sample CONTAINING twice the AMOUNT of substance as another sample requires the transfer of twice as much heat (Q) to ACHIEVE the same change in temperature (ΔT). For EXAMPLE, if it takes 1,000 J to heat a block of iron, it would take 2,000 J to heat a second block of iron with twice the mass as the FIRST.
Discussion
3427.

Answer 7th one...if u know all then u can answer all or pls answer only 7th question​

Answer»

ANSWER:

It's SECOND ONE...

MG(h2-h1)

Discussion
3428.

Hey guys what is volocity don't spam​

Answer»

Answer:

The velocity of a body is the distance travelled PER second by the BODY in a SPECIFIED direction.
Discussion
3429.

.. personal pals smart mini questions​

Answer»

1/f = 1/u + 1/v is CORRECT
Discussion
3430.

a block of wood of density 0.8 gram per centimetre cube has a volume of 60 cm cube what would be the mass of the block​

Answer»

ANSWER:

PLEASE see the attachment

plz MARK my answer as brainliest if it helped u

plzzzzz
Discussion
3431.

ek Doli ek daal par do metre prati second squire ke torrents niche ja rahi hai gati pranam karne ke 3 second ke pakshat uska kya hoga

Answer»

Answer:

BHAI PLEASE WRITE THE ANSWER IN ENGLISH OR SHARE THE PHOTO  

OK . I CANT UNDERSTAND THE LANGUGAGE

Explanation:
Discussion
3432.

The graph given alongside shows how the speed of a car changes with time.(1)what is the initial speed of a car ?(2)what is the maximum speed attained by the car?(3)which part of the graph shows zero acceleration?(4)which part of the graph shows varying retardation?(5)find the distance travelled in first 2second

Answer»

SECOND ONE what is the macimum SPEED of a CAR?
Discussion
3433.

The invention of _________ proved to be a revolution in our means of transportwhat will come in the dash

Answer»

Answer:

wheel

Explanation:

since the invention of wheel is CONSIDERED to be the master KEY for the idea behind MEANS of TRANSPORT.
Discussion
3434.

A person is able to walk on a road because of​

Answer»

\huge\underline\pink{Your <klux>ANSWER</klux>}

because of friction

☺️♥️ Hope it helps ♥️☺️

Mark my answer as BRAINLIEST ✌️
Discussion
3435.

What is atmospheric pressure. explain in briefe​

Answer»

Answer:

a pressure EXERTED by the weight of the atmosphere..

ONE IMPORTANT thing I want to tell you is

ITS VALUE AT SEA LEVEL IS 101,325 PASCAL

please mark it BRAINLIEST
Discussion
3436.

A body moves with a velocity of 2m/s for 5s, then its velocity uniformly increases to 10 m/s in the next 5s. Thereafter its velocity begins to decrease at a uniform rate until it comes to rest after 10s. Plot a v-t graph and find (a) acceleration (b) retardation and (c) total distance travelled.

Answer»

Answer:

Explanation:

The body moves from A to B at velocity 2 m/s for 5 s, then it accelerates, from B to C, for 5 s and ATTAINS a velocity 10 m/s. Finally, it comes to rest in 10 s at a constant retardation, from C to D.

 

2.

A to B is uniform motion.

B to C and C to D is non-uniform motion.

 

3.

Distance travelled in 2 s

From the graph, the distance travelled in 2 s is = ut = 2 × 2 = 4 m (1)

Distance travelled in 12 s

Distance travelled in 5 s = ut = 2 × 5 = 10 m ..(2)

In the next 5 s the acceleration is, a = (V-u)/t = (10-2)/5 = 1.6 m/s 2

Distance travelled in this 5 s is, S = ut + ½ at 2

=> S = 2 × 5 + 0.5 × 1.6 × 5 2

=> S = 30 m (3)

After that the body starts slowing down. The acceleration now is = (0-10)/10 = -1 m/s 2 (negative sign indicates deceleration)

So, distance travelled in 2 s during the slowing down, S = ut + ½ at 2

=> S = 10 × 2 0.5 × 1 × 2 2

=> S = 18 m (4)

So, TOTAL distance covered in 12 s is = 10+30+18 = 58 m

Distance travelled in 20 s

Distance travelled in 20 s is equal to (2)+(3)+total distance travelled during the slowing down.

Total distance travelled during the slowing down can be found using,

v 2 = u 2 + 2aS

=> 0 = 10 2 2 × 1 × S

=> S = 50 m

So, total distance travelled in 20 s = 10+30+50 = 90 m

The body moves from A to B at velocity 2 m/s for 5 s, then it accelerates, from B to C, for 5 s and attains a velocity 10 m/s. Finally, it comes to rest in 10 s at a constant retardation, from C to D.

 

2.

A to B is uniform motion.

B to C and C to D is non-uniform motion.

 

3.

Distance travelled in 2 s

From the graph, the distance travelled in 2 s is = ut = 2 × 2 = 4 m (1)

Distance travelled in 12 s

Distance travelled in 5 s = ut = 2 × 5 = 10 m ..(2)

In the next 5 s the acceleration is, a = (v-u)/t = (10-2)/5 = 1.6 m/s 2

Distance travelled in this 5 s is, S = ut + ½ at 2

=> S = 2 × 5 + 0.5 × 1.6 × 5 2

=> S = 30 m (3)

After that the body starts slowing down. The acceleration now is = (0-10)/10 = -1 m/s 2 (negative sign indicates deceleration)

So, distance travelled in 2 s during the slowing down, S = ut + ½ at 2

=> S = 10 × 2 0.5 × 1 × 2 2

=> S = 18 m (4)

So, total distance covered in 12 s is = 10+30+18 = 58 m

Distance travelled in 20 s

Distance travelled in 20 s is equal to (2)+(3)+total distance travelled during the slowing down.

Total distance travelled during the slowing down can be found using,

v 2 = u 2 + 2aS

=> 0 = 10 2 2 × 1 × S

=> S = 50 m

So, total distance travelled in 20 s = 10+30+50 = 90 m
Discussion
3437.

A body of mass 10kg is testing on a perfect smooth surface then reaction force is​

Answer»

ANSWER:

zero

Explanation:

as the surface is TOTALLY smooth the surface REACTION will be zero
Discussion
3438.

What is induction motor​

Answer»

Answer:

An INDUCTION motor or asynchronous motor is an AC ELECTRIC motor in which the electric current in the rotor needed to produce torque is obtained by ELECTROMAGNETIC induction from the magnetic field of the stator winding. An induction motor can therefore be made without ELECTRICAL connections to the rotor.

Discussion
3439.

What do you think.....about time slip?those who know....they only answer....okk...and follow plz....I will follow back​

Answer»

Answer:

So time slip, is  just a rare and enigmatic phenomenon, quite mysterious that has no answers and nothing, not even science can define it. The first case of time slip was reported at Liverpool in England. They experienced time slipped BACK to 19's everything was WEIRD from people CLOTHES to cars.

Known reason of  time slip---

According to Einstein Theory of relativity, time is not constant. We can only travel into the future but no COMING back to the PAST. Only, the object travelling at speed of light can do this.
Discussion
3440.

Which type of motion does a swing exist ​

Answer»

Answer:

SWING EXIST PENDULUM motion

hope this helps you and MARK it as a brainlist and follow me please
Discussion
3441.

An Athlete completes one round of a circular park of diameter 200 m in 40 s. Find distance and displacement at the end of 2 minutes and 20 s.

Answer»

ANSWER:

DISTANCE :2200m

displacement:200m
Discussion
3442.

Pedal of a bicycle is in which motion​

Answer»

Answer:

circular MOTION is the pedal of a bicycle ...PLEASE mark as brain liest ANSWEE
Discussion
3443.

The expression for reaction force R is​

Answer»

ANSWER:

A PART is the answer

please MARK me as BRANLIEST
Discussion
3444.

Q.4 The net force when two unbalanced forces F1 & F2 are acting in thesame direction is?​

Answer»

ANSWER:

sum of the two FORCE

Explanation:

hope it helps
Discussion
3445.

The Component of reaction (R) perpendicular to the plane of contact is calleda) Normal forceb) Frictional forcec) Reaction forced) All of these​

Answer»

EXPLANATION:

ANSWER is NORMAL force

I THINK it is USEFUL
Discussion
3446.

If Tampa is south of Spring Hill. Then Spring Hill is the ______________.

Answer»

Answer:

TAMPA

HOPE it is helpful to you,,

so PLEASE make me brainlist ♥️
Discussion
3447.

Him many galaxies are there in the universe??​

Answer»

Maybe millions of GALAXIES exists in this UNIVERSE on one can tell you how much EXACTLY it is

Discussion
3448.

In what ways air can be considred as matter

Answer»

ANSWER:

AIR is a MATTER because it has mass and can OCCUPY space .
Discussion
3449.

A substance which does not allow light to pass throught​

Answer» OPAQUE SUBSTANCES is the CORRECT ANSWER
Discussion
3450.

What measurement device does a carpenter use ?

Answer»

ANSWER:

A MEASURING TAPE.
Discussion