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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.
| 2251. |
1. A car moves 100 m due east and then 25 m due west.(a) What is the distance covered by the car? (b) Whatis its displacement? |
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Answer» a) what is the DISTANCE covered by the CAR : Distance is the total path covered by the object.hence distance travelled=100+25=125m b)what is its DISPLACEMENT? Displacement is the shortest path between SOURCE and destination.Car moves 100m forward(east) and then 25m backward(WEST)so displacement =100-25=75m
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| 2252. |
. A hot object loses heat to its surroundings in the form of heat radiation. The rate of loss of heat depends on the : (1) • temperature of the object • temperature of the surroundings • temperature difference between the object and its surroundings • average temperature of the object and its surroundings |
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Answer» Radiation The rate heat lost though radiation depends on the temperature DIFFERENCE between the object and its surroundings. Explanation Heat loss through is GIVEN by where
A = Surface area of object T = Temperature of object in Kelvin
It can be seen that rate heat lost though radiation depends on the temperature difference between the object and its surroundings. Learn more: |
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| 2253. |
Motion of an object depends on the……………… |
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| 2254. |
A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius1.5 m with a speed of 40 rev./min in a horizontal plane. What is the tension in thestring? What is the maximum speed with which the stone can be whirled around ifthe string can withstand a maximum tension of 200 N ?Answer me fast✌✌✌ |
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Answer» Answer: Mass of the stone, m = 0.25 kg Radius of the circle, r = 1.5 m Number of revolution PER second, n = 40 / 60 = 2 / 3 rps Angular VELOCITY, ω = v / r = 2πn The CENTRIPETAL force for the stone is provided by the tension T, in the string, i.e., T = FCentripetal = mv2 / r = mrω = mr(2πn)2 = 0.25 × 1.5 × (2 × 3.14 × (2/3) )2 = 6.57 N Maximum tension in the string, Tmax = 200 N Tmax = mv2max / r ∴ vmax = (Tmax × r / m)1/2 = (200 × 1.5 / 0.25)1/2 = (1200)1/2 = 34.64 m/s Therefore, the maximum speed of the stone is 34.64 m/s. |
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| 2255. |
An object moving with constant velocity has……………. Acceleration |
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Answer» Answer: Zero Explanation: An OBJECT MOVING with CONSTANT velocity has Zero Acceleration. |
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| 2256. |
3. State two characteristics of a standa4. Define length. What is its SI unit? PA |
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Answer» Answer: the measurement or EXTENT of something from end to end; the GREATER of two or the greatest of three DIMENSIONS of an object. Explanation: |
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| 2257. |
12. Ritwik jogs from end A to end B of a straight road that is 300 m long in 2 minutesand 20 seconds. He then turns back and jogs 100 m to point Cin 1 minute. Find theaverage speed and average velocity of Ritwika) from A to Bb) from A to C. |
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Answer» Answer: just substitute the VALUES like d Or distance = 300m time=20s and stuff and read TEXT and follow as TOLD with the Apropriate FORMULAS |
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| 2258. |
. A feather is dropped on the moon from a height of 2.52 meters. The acceleration of gravity on the moon is 1.67 m/s2 . Determine the time for the feather to fall to the surface of the moon. Find the final velocity by which it hits the ground. Knowing the strength of Jasprit Bumrah, he throws a ball upwards on moon with a speed of 1800cm/min. Calculate the maximum height the ball will attain. |
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| 2260. |
What is the name of these component??please tell me fast..... |
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| 2261. |
An athlete runnings on a circular train of radius 5 m complete one round in 13 sec .find the average speed and average velocity |
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Answer» Answer: Here, RADIUS of track = 5m time to COMPLETE one round =13s We know that, Average SPEED = total distance/ time taken average speed = 2πr/13 = 32/13 = 2.46 m/s (as displacement =0) Explanation: |
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| 2262. |
3.State two types of physical changes that may take place when a substance isheated. |
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Answer» Explanation: 1. the movement of its PARTICLES increases. 2. bonds between particles break when a SUBSTANCE MELTS or evaporates, or SUBLIMES to FORM a gas from a solid. |
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| 2263. |
In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. |
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Answer» Answer: In ORDER to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this LEGAL document is HEREBY made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. For more information: go to google and paste this answer. Hope it HELPS you!!Plz Mark me as a brainliest. |
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| 2264. |
2. There are two balls made up of the same metal, of the same size and has the sameweight. Both are connected by a rod as shown below. If the temperature of ball A is50 °C and ball B is 80 °C, what will be the direction of net transfer of heat?B = 80 °C(A = 50°C(a) A to B(b) B to ANo transfer of heat will take place.(d) From both the directions0000(0)please answer the corrrct person gets brilliant answer! |
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Answer» ANSWER:DIRECTION will be B to a Explanation: |
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| 2265. |
which of the following takes up the shape of the container it is in closed in(a)soild(b)liquid(c)gas(d)both(b)and(c) |
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| 2266. |
Tell me first for Brainliest |
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Answer» I don't understand your HANDWRITING . r u a DOCTOR????? |
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| 2267. |
In the following situation where the α of brass is 17 and copper is 19, can these two be used to construct a fire alarm. Justify your answer. Rishi wrote that β of ethanoic acid is 17. Is he correct? Justify your answer. Rishi is trying to dry his clothes on a rainy day. Suggest him the perfect method to do so. |
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Answer» Answer: In order to promote public education and public safety, EQUAL justice for all, a better informed CITIZENRY, the rule of law, world trade and world peace, this legal document is hereby made AVAILABLE on a noncommercial basis, as it is the RIGHT of all humans to KNOW and speak the laws that govern them. pls mark me as brainliest |
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| 2268. |
calaculate the force applied on abody producing a moment of force of 16N m such that the perpendicular distance between the point of application of force and the turning point is 80 cm |
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Answer» F*s = 16 F * 0.8 = 16 F = 20 N Thank you. |
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| 2269. |
In the following situation where the α of brass is 17 and copper is 19, can these two be used to construct a fire alarm? |
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Answer» Answer: Brass is an alloy of copper and ZINC, in proportions which can be varied to achieve varying mechanical and electrical properties.[1] It is a substitutional alloy: atoms of the two constituents may replace each other within the same crystal structure. Brass is similar to bronze, another alloy CONTAINING copper, with tin in place of zinc;[2] both bronze and brass may include SMALL proportions of a range of other elements including arsenic, lead, phosphorus, aluminum, manganese, and silicon. The distinction between the two alloys is largely historical,[3] and MODERN practice in museums and archaeology increasingly avoids both terms for historical objects in favor of the more general "copper alloy".[4]
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| 2270. |
What is a lactometer? Kindly state the principle of its working. |
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Answer» Answer: Lactometer is a DEVICE used for FINDING the purity of a milk sample. It works on the principle of Archimede's principle that a SOLID suspended in a fluid will be buoyed up by a force equal to the weight of the fluid DISPLACED.
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| 2271. |
The2B fill in the blanks1 Saliva is secreted by the in the mouth cavity. 2. molar teeth are present in human adult.3 finger like projections in the walls of small intestine are called 4. Absorption of water From the undigested foodtakes place in 5. the four chambers in the stomach of theMuminants are, , |
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Answer» 1. Salivary Gland 2. 6 molars[present in each jaw] 3. Villi 4. LARGE Intestine 5. (i)Rumen (II)Reticulum (iii)Omasum (iv)Abomasum
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| 2272. |
When electricity passes through the light bulb in this electrical circuit, the filament inside the bulb heats up and produces light energy. Which word best describes the light bulb filament? (A) Battery (B) Electrolyte (C) Terminal (D) Resistor |
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Answer» ANSWER:ELECTROLYTE will BEST describes the FILAMENT of bulb. |
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| 2273. |
The Shadow of object is the longestmorning andeveningand the shortestat noonWhy ? |
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Answer» Shadows are longest in the EARLY morning and late afternoon/early evening when the SUN appears low in the sky. As the Earth rotates on its axis, the sun hits each location in the morning at an angle. This BECOMES more vertical as the sun appears to PASS more directly overhead around noon. Explanation: |
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| 2274. |
Those solid tend sublime in which intermilecular force are weak true aur false |
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| 2275. |
Those solid tend yo sublime in which intermilecular force are weaktrue aur false |
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Answer» Answer: husband for girls who don't have the TIME and I a big DEAL t I'm just not sure if that I am very pr or ANYTHING LIKE that is very m or not but it is one of my |
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| 2276. |
Sciences explain the types of emulsion with neat diagramplease answer me it was very urgent |
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Answer» There are two basic types of emulsions: oil in water and water in oil. In every emulsion, there is a continuous phase (DISPERSION medium) that SUSPENDS the droplets of the other element which is called the dispersed phase. ... In milk LIQUID fat globules are dispersed in water. Other examples are vanishing CREAM |
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| 2277. |
Scienceexplain the types of emulsion with neat diagramplease answer me it was very urgent friends |
Answer» Emulsions are colloidal solutions with both dispersed phase and dispersion medium being liquid. Thus, finely divided droplets of one liquid are dispersed in another medium. Emulsions can be formed from any two imiscible liquids. Two types of emulsions include oil in WATER emulsion and water in oil emulsion.HOPE IT WILL HELP YOUPLZZ MARK AS BRAINLIST |
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| 2278. |
Explain the formation of Warm Hole...??Copied Answers will be reported!!!??✌️ |
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Answer»
In 1935, Albert Einstein and his COLLEAGUE Nathan Rosen showed that black holes can theoretically be connected via ‘wormholes’ – shortcuts through space and time that could link up black holes light-years apart. To create a wormhole on Earth, we’d first need a black hole. This is problematic: creating a black hole just a centimetre across would require crushing a mass roughly equal to that of the Earth down to this tiny size. Plus, in the 1960s theorists showed that wormholes would be incredibly unstable. It could be possible to stabilise the wormhole using so-called ‘exotic matter’, whose existence is predicted by quantum THEORY. This weird stuff is expected to have an antigravitational EFFECT, which could stop the wormhole COLLAPSING. But no one has a clue how to do any of this. And even if they did, it might all be pointless: theorists now suspect that travelling via wormholes would actually take longer than simply taking the conventional route through space. plz follow and mark as the brainliest.✌✌✌✌ |
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| 2279. |
If the magnification of the mirror is – 1.5 , then answer the following:- (a) Name the mirror (b) State the nature of the image. (c) State the size of the image formed whether it is magnified or diminished. |
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| 2280. |
39.Momentum of a particle is increases 50%By how much persentage KE of particlewill increase?1)100%2) 125%3) 150%4) 200% |
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| 2281. |
Rishi wrote that β of ethanoic acid is 17. Is he correct? Justify your answer. |
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Answer» then ask SOMEONE |
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| 2282. |
Some uses of convex mirror |
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Answer» Answer: Convex mirrors are used inside the BUILDINGS , They are also used in making lenses of SUNGLASSES , They are used in magnifying glass , They are used in SECURITIES and they are used in telescopes .HOPE IT HELPS YOU |
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| 2283. |
A)State Archemedies principle. |
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Answer» Answer: Archimedes' principle STATES that the UPWARD buoyant force that is exerted on a BODY immersed in a fluid, WHETHER fully or partially SUBMERGED, is equal to the weight of the fluid that the body displaces. Archimedes' principle is a law of physics fundamental to fluid mechanics. Hope it helps you^_^ |
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| 2284. |
hi mam please find the main reason to believe you are interested then please do let me know if you have received |
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Answer» what is the QUESTION? I THINK it's INCOMPLETE |
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| 2285. |
If the velocity is decreased by half , how is the Kinetic Energy affected if the mass is kept the same. |
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Answer» Answer: Reduces by factor of 4 Explanation: We know that, K.E of object = 1/2 mv² ....(Formula) Now the Velocity is HALVED by KEEPING mass constant ! Therefore, THUS, K.E(1) / K.E(2) = {v²} / {v²/4} K.E(1) / K.E(2) = 4/1 Thus, K.E(1) = 4 × K.E(2) K.E(2) = K.E(1) / 4 Hence, If Velocity is halved then the Kinetic Energy is reduced by a factor of 4If you think I was right surely mark it as BRAINLIEST ANSWER |
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| 2286. |
How will you use a clinical thermometer? Long answer question. give the correct answer and I will mark you as brilliant. |
Answer» Answer:mate HOPE it is HELPFUL......... REFER ATTACHMENT |
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| 2287. |
Do all the bodies have inertia? Ifnat, name thefactors which determines in inertia of abody |
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Answer» yes all the bodies of inertia for EXAMPLE inertia of rest, inertia of MOTION ,or inertia of direction." follow me so i follow U |
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| 2288. |
In electricity:When ther is conductive charge and a paper cylinder is charged with a comb so it is attracted but after some time it repels so after that the paper cylinder is charged or neutral |
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Answer» Because if it contains charge then it will be neutralized as it was neutral so it get ATTRACTED and when he get the same charge it repeled |
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| 2289. |
Which force of attraction holds together in atom? |
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Answer» Answer: In an atom there are three fundamental forces that keep ATOMS TOGETHER. ELECTROMAGNETIC force, strong force, and weak force. The electromagnetic force KEEPS the ELECTRONS attached to the atom. The strong force keeps the protons and neutrons together in the atom. |
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| 2291. |
Are atoms combining in the same manner |
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Answer» Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms cannot be created or DESTROYED. Atoms of different elements may combine with each other in a fixed, simple, WHOLE number ratios to form COMPOUND atoms. |
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| 2292. |
Vernier callipers? How does it work? |
Answer» Please mark as brainliest and follow me plzz.Explanation: The use of the vernier scale is shown on a vernier caliper which measures the internal and the external diameters of an OBJECT. ... Only when a full ten marks are counted is there alignment, because the tenth mark is ten tenths—a WHOLE main scale unit—short, and therefore aligns with the ninth mark on the main scale. |
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| 2293. |
How do atoms combine |
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Answer» hlo mate here is ur ans..... An atom is the smallest particle of matter.On earth atoms combine to form molecules which in turn form elements that mass into matter.All this happens in motion with electrical and magnetic implications.We are experiencing a three dimensional,linear reality and our observations and instruments are attuned to this area of space on the surface of a spinning SPHERE.Space is:”the dimensions of height, depth, and width within which all things exist and move.”Atoms fluctuate at a very high and uniform frequency between space and counter space. The physics of counter space are not linear or three dimensional. They are beyond our simple and LOW consciousness comprehension.The fluctuation point that we CALL an atom forms a sphere of influence. Every atom can be imagined as a fluctuating star with space between each other. This space could be considered as the sea of consciousness or called the aether.The reason why atoms combine is that the universe is a beautiful and on going creation of INTELLIGENT systems that work together for the good of the whole. This is a truth that can easily be seen in how the Billions of CELLS in your body all work together to support and maintain your growth and mental abilities. You are a conscious being who feels love and thinks new ideas.....hope this hepls uh dear.... pls amrk as brainliest ......
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| 2294. |
Can someone explain the concept of straws and atmospheric pressure? |
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Answer» Explanation: the pressure exerted by the earth's ATMOSPHERE at any given point, being the product of the mass of the ATMOSPHERIC COLUMN of the unit area above the given point and of the gravitational acceleration at the given point. a value of standard or normal atmospheric pressure, equivalent to the pressure exerted by a column of mercury 29.92 inches (760 mm) high, or 1013 millibars. |
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| 2295. |
A particle is projected with velocity of 40√2 m/s making anangle of 45° with the horizontal, the magnitude of velocityof the particle at t = 1 s after projection, will be |
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Answer»
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| 2296. |
A body travel a distance of 10 km with constant speed of 30 km/h and then the next 40 km at a constant speed of 50 km/h . Find the average speed for the whole journey. |
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Answer» PLEASE MARK has BRAINLIEST ANSWER (❁´◡`❁)(♥_♥)(❁´◡`❁)(♥_♥)(❁´◡`❁)(♥_♥)(♥_♥)(❁´◡`❁)(♥_♥) |
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| 2297. |
A stone is dropped into a well of depth 125 metres. Calculate the time taken by the sound of the splash to reach the man |
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Answer» TIME = distance/velocity time=125/332 = 0.38 SEC |
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| 2298. |
This contains a variety of elements and compounds that are not chemically combined. A) Water B) Mixture C) Elements D) Compounds |
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Answer» mixture Explanation: |
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| 2299. |
The Fragrance of an incense sticks lit in one corner of a room fells up the entire room in a short while ? Explain |
Answer» Answer:Hi mate here is your answer.Explanation:When an incense STICK is lighted in one corner of a room, its fragrance spreads in the WHOLE ROON quickly because the particles were mixes with the space present in the air and as the air MOVES the particles also move and room is full of fragrance.Hope it is helpful and Mark it as a brainlist and follow me back. |
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| 2300. |
What is lambda in physics? (lambda symbol is upside-down y) |
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Answer» Yupp how are you |
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