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.
| 4551. |
If I rub a glass rod with a silk cloth, which object will have a positive charge and which object will have a negative charge? Provide an explanation. |
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Answer» Glass-Positive chargeSilk-Negative chargeExplanation:Glass loses electrons,so it BECOMES positively charged, while SILK is positively charged.If you CHECK the triboelectric series, glass is above silk.Hope my ANSWER helped you |
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| 4553. |
Ex. 2. A body weighs 500 gf in air and 450 gf when wholly immersed in water. Calculate : (i) the loss in weight of the body in water.(ii) the upthrust of the body.(iii) volume of the body |
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Answer» Weight of BODY in AIR,W=450gf=450g dynesWeight of body in water,W =310gf=310g dynesLet d be the density of the body,v be the volume .Let q be the density of water.Now,W=Vdg-->450 g =VdgBuoyant force , B =Vgq-->B= Vg[q=1g/cm3]Now, W/=W-B-->310g = 450g-Vg-->v =140 cm3Loss in weight =BUOYANT force = Vqg=140×1×g=140g dynes=140gfAgain upthrust =Buoyant force = 140 gfHope it helps... |
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| 4554. |
A person carries a load of 1000 N at a vertical height of 20 m in 1 minutes .Calculate his power. |
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Answer» re!Given,LOAD (mg)= 1000 NHeight (H)= 20 mTime(t) = 1 min = 60 secNow,Work DONE = mgh = 1000 * 20 = 20000 JNow,Power = work done / TIME = 20000 / 60 = 333.3 W |
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| 4555. |
A Force f=5i+2j-5k acts upon on a partical whose position vector is r = i-2j-12k . What is the torque about the origin ? Plzz give me answer of this question |
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Answer» the ANSWER is 65Explanation: in this QUESTION we have to USE the formula for TOWELS that is Torque equals to radius into force here we have to do cross multiplication |
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| 4557. |
Hehe thanku bestie come u too answer my question and come on leader board and congrats dear you are in all board expect daily leader board |
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Answer» not in monthly BOARD.I will COME in daily leader Board soon. |
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| 4558. |
True or False 1. Energy can neither be created nor be destroyed.2. The SI unit of energy is same as that of work.3. An arrow on a stretched bow possesseselastic potential energy.4. Kinetic energy possessed by a movingobject is directly proportional to its speed.5. When a matchstick is rubbed against a match box, heat and light are produced at the expense of kinetic energy.6. An electromagnet converts electrical energy into magnetic energy.7. A windmill utilises kinetic energy of air to do mechanical work.8. Mechanical energy is producedon burning a fuel. |
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Answer» truefalsetruefalsetrue truetruefalseExplanation:HOPE RIGHT now my ANSWER |
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| 4559. |
A body having mass 'm' is moving at a velocity 'v' if its velocity is reduced half then what will be its kinetic energy? Please give a specific solution. |
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Answer» Given: Initial velocity =v; Final velocity = 3V Initial kinetic energy k 1 = 21 ×m×v 2 Final kinetic energy k 2 = 21 ×m×( 3v ) 2 = 91 × 21 MV 2 Change in kinetic energy = 21 mv 2 − 91 × 21 mv 2 = 21 mv 2 (1− 91 )= 98 × 21 ×mv 2 = 98 × Initial kinetic energy. |
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| 4560. |
Why are cloudy nights warmer than clear nights? |
| Answer» DUE to SEA BREEZE which COMES at NIGHT | |
| 4561. |
Page No. Date :anA lody & Slieling down on an inelined planeOf d valle of frunciton al fore of thesurface & you then how much fore itElleshenille for the body to ulice clown |
| Answer» SORRY I can't UNDERSTAND what are you TELLING PA sorry | |
| 4562. |
Do kinetic energy change into heat energy |
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Answer» Yes, Kinetic Energy changes into Heat Energy.Explanation:One of the most important concepts in physics is the principle of energy conservation, especially the IDEA that energy can change forms and be transferred from one object to ANOTHER. An important application of this idea is that kinetic energy can be transferred to heat, which is just another form of energy.For EXAMPLE:-Imagine a block sliding on a surface including friction. Gradually, it'll STOP. If we touch both the surface and the block, they are hotter, their temperatures have increased.Mark as BRAINLIST.... |
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| 4563. |
In 10g to 50g of mass object which has more innertia and why |
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Answer» An object with a GREATER mass will have more INERTIA as it takes more force to CHANGE their MOTION. |
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| 4564. |
A man threw a stone vertically upwards from a point and it strikes the ground with a velocity of 8m/s. Find the highest point reached above the ground (m). Take g=9.8m/s² |
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| 4565. |
1. speed 2. Velocity3. Acceleration4. Drum's membrane5. Potters wheel6. Frequency7. Amplitude |
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| 4566. |
An object change active by it will have a uniform |
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Answer» falseExplanation:uniform MOTION means it is moving in a straight line at a constant SPEED is called uniform MOTIONPLEASE MARK me brilliant |
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| 4567. |
Different between speed and velocity |
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Answer» Speed is the time rate at which an OBJECT is moving along a path, while VELOCITY is the rate and DIRECTION of an object's movement.Explanation:PLEASE follow |
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| 4568. |
Speed of a car is 25 m/s. How long will it take to cover the distance of 90 km? A) 1 hour B) 2 hours C) 2 hours ho) 4 hours |
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| 4570. |
The moment of a force of 25 N about a point is 2:5 Nm . Find the perpendicular distance of foxes from that point: |
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Answer» The moment of a force of 25 N about a point is 25 N m. FIND the perpendicular DISTANCE of force from that point. Ans. 10 CM. |
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| 4571. |
State the effect of friction pls fast |
| Answer» UCES heat, that helps in heating parts of any object or to warm ourselves. It also causes loss in power. It produces noise during any kind of operation. It's because of FRICTION that we're able to WALK, run, play, etc. | |
| 4572. |
I want to be a wrriter when i grow up, okay zara |
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| 4573. |
A cup filled up with water is steadily slided towards a barrier. What will happen the cup hits the barrier? |
| Answer» EMENT In geometry and MECHANICS, a displacement is a vector whose LENGTH is the shortest distance from the initial to the FINAL position of a point P undergoing MOTION. | |
| 4574. |
Hydraulic jacks, automobile brakes and even the lift generated on airplane wings can be explained using Pascal's principle. Pascal's principle is based on the idea that fluids at rest are incompressible, allowing very large forces to be transmitted with the application of a smaller force. In a hydraulic lift for example, two pistons are separated by the space filled with a liquid. (1x2=2) 3. As per pascal’s law (a) Intensity of pressure at a point in a moving liquid is equal in the direction of the applied force. (b) Intensity of pressure at a point in a static liquid is equal in all directions. (c) Intensity of pressure at a point in a moving liquid is equal in all directions. (d) Intensity of pressure at a point in a static liquid is equal in the direction of the applied |
| Answer» FALSE(Because PASCAL's LAW is applicable only in static liquid)False (Because pascal's law is applicable only in static liquid)True | |
| 4575. |
What is Earth in state of |
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Answer» is frame earth is at rest. If you were in SPACE and LOOKING at the Earth youll notice that it is orbiting the sun . In this frame the Earth is MOVING and the sun at rest. |
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| 4576. |
Fill in the blanks. a. Moment of force = _______ × distance of force from the point of turning.b. Liquid pressure increases if _______ increases.c. The atmospheric pressure on earth surface is nearly _______.d. The unit of pressure is _______.e. To obtain a given moment of force for turning a body, the force needed can be decreased by _______. |
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Answer» 0ne LI first one SECOND WORLD GVCC SEAPORT in flow with the pressure a part and |
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| 4577. |
Fresh milk has a PH of 6.6. Explain why the PH changes as it turns into curd? |
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Answer» tion:Being acidic in nature, the pH value of milk is 6. When milk is CONVERTED into CURD due to the ACTION of bacteria, lactic acid is formed which is more acidic in nature. Therefore, as milk turns into curd the pH value GETS reduced. |
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| 4579. |
Information about cyclones will be given by_______? |
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Answer» • How cyclones are NAMED?=> GLOBAL bodies like--World Meteorological Organisation (WMO), United Nations Economic and Social Commission for Asia, and the Pacific give names to cyclones.Explanation:INDIAN Meteorological Department (IMD) is AMONG six RSMCs in the world, is mandated to issue advisories and NAME tropical cyclones in the north Indian Ocean region. |
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| 4580. |
Aapko punjabi sikhni hai to sikh lo...:-) |
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Answer» zindabaadmust TRY |
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| 4581. |
(10X1 A. Choose the correct answer: 1. The SI unit of force is (a) newton (N) (b) kilogram force (kgf) Teen roes in the fire (c) gramforce (gf) (d) dyne |
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| 4582. |
The device which can directly measure the electric potential difference between two points is / are : a. Voltmeterb. Ammeterc. Galvanometerd. MultimeterNote : Choose one or more options |
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Answer» a) VOLTMETER EXPLANATION:HOPE its HELPFUL |
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| 4583. |
When you put a thin layer of sand on road, will it increase or decrease the friction between tyre and the road? |
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Answer» u put a THIN layer of sand on road, will it INCREASE or decrease the friction between tyre and the road?Ans. increase. |
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| 4584. |
The train started from a station reaches the other station 195 km away. Find the time taken by the train to travel this distance with speed 117 kmph. |
| Answer» 140 km/hrExplanation:mujhe SAB answer AATA hai . KUCH bhee puchoo | |
| 4585. |
thanks for all your support i am crosed 1500 points i will support you all and continue your supporting for all the members in branally |
| Answer» CONGRATULATIONS SISTER LOVE you SIS | |
| 4586. |
What ia motion!?????????? |
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Answer» Motion, in physics, change with time of the position or orientation of a BODY. ... Motion that CHANGES the orientation of a body is called ROTATION. In both cases all POINTS in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity).mark me as brainliest ANSWER |
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| 4587. |
Acceleration due to gravity is _____________ when the body falls vertically downwards. a) positive b) negative c) zero d) all of the above please answer this quick and correctly.. its really important . |
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Answer» ation due to gravity will be positive because it GOING down TOWARDS earth and accelration due t gravity also WORK in the direction of earth so it will be positive and when it will go up then acceleration due to garvity will be NEGATIVE |
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| 4588. |
What is physics ?what is biology? |
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Answer» Biology is the study of LIVING organisms. Physics is the study of matter and the laws of nature to understand the BEHAVIOR of matter and the universe. The Biophysical Society explains that, when scientists COMBINE physics and biology, they learn more about biological SYSTEMS on a molecular or atomic level.Explanation:hope it will help u. |
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| 4589. |
Find out the position of 5kg mass where the Fnet will 6e zero on it |
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Answer» the wall at the BOTTOM of a dam can withstand a pressure of 784,000claculate the pressure above which the dam may collapse the density of WATER is 1g/cm^3 and the acceleration DUE to gravity on the surface of the EARTH is 9.8ms^2please make as brainlistplease make as brainlist |
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| 4590. |
Are bro woh abhi ayi on. line na that's why Di her name is also Divya meri following mein heinBTW Divya were u from |
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| 4591. |
What is the density of pure water in SI? |
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Answer» Density is an intrinsic property of MATTER having unit kg/m3 in SI and g/cm3 in CGS methods. The density of water is defined SIMILARLY to other substances. At room temperature ( ~ 200C), its value is 998.2 kg/m3. The density of water at 25 degrees Celsius is 997 kg/m3.Explanation:please mark me as brainliest answer to reach GENIUS rank |
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| 4592. |
Write the procedure for a preparing your own magnet |
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| 4593. |
How is height pf a liquid column affected by atmospheric pressure expain with an activity |
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| 4594. |
Who gave the term unity in diversity? How do the people of India display it? |
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| 4595. |
Ten identical metallic balls of density 5 g cm3 when dropped into water, the volume of the water dis- placed is found to be 500 cm3. Determine the mass of each metallic ball. |
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Answer» your PROFILE was cuteExplanation:Please dear MARK me as BRAINLIEST i want your help |
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| 4596. |
A stretched rubber band possess (a) kinetic energy(b) elastic potential energy (c) muscular energy (d) gravitational potential energy |
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| 4597. |
What is "Acceleration"?? |
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Answer» ation, rate at which velocity changes with TIME, in TERMS of both speed and direction. A POINT or an object moving in a straight line is accelerated if it SPEEDS up or slows down. MOTION on a circle is accelerated even if the speed is constant, because the direction is continually changing. |
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| 4598. |
What is philosopher's stone?? |
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Answer» a mythical SUBSTANCE supposed to CHANGE any METAL into gold or silver and, according to some, to cure all diseases and prolong life INDEFINITELY. Its discovery was the SUPREME object of alchemy.Explanation:please mark me as brainliest |
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| 4599. |
a student's decides to measure the period of a pendulum the period is the time taken for one complete string using a stopwatch he finds that it completes Wings take 7.4 seconds with his calculator he then uses this data to work out the time for Once showing the number is shown on his Calculator with 0.925 is it acceptable for the students to claim that the period of Pendulum is 0.925 S explain your answer |
| Answer» LAND LE lelo MERA OK done | |
| 4600. |
the Body Mass Index BMI of a person is measured by taking the mass of the person / the square of his height use information provided to work out the derived SI unit for BMI |
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Answer» tion:BMI, formerly called the Quetelet index, is a measure for indicating nutritional status in adults. It is DEFINED as a person's weight in kilograms divided by the square of the person's height in METRES (KG/m2). For example, an adult who WEIGHS 70 kg and WHOSE height is 1.75 m will have a BMI of 22.9. |
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