InterviewSolution
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.
| 9651. |
of Pay12, In an imaginary atmosphere, the air exerts a small forceF on any particle in the direction of the particle's motionA particle of mass m projected upward takes a time t.in reaching the maximum height and t, in the returnjourney to the original point. Then(a)t, <t, (b) , > t, (c) t, = t; (d) the relation betweent, and t, depends on the mass of the particle. |
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| 9652. |
A particle P at the origin starts with velocity (2i-4j ms with constant acceler(3i -5j)ms 2. After traveling for 2 s, its distance from the origin is: |
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| 9653. |
A cylindrical vessel, whose diameter and height both are equal to 30 cm, is placedon a horizontal surface and a small particle P is placed in it at a distance of 5.0 cmfrom the centre. An eye is placed at a position such that the edge of the bottom isjust visible. The particle P is in the plane of drawing. Up to what minimum heightshould water be poured in the vessel to make the particle P visible? |
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| 9654. |
TlHotoerNfianu «किए. जेलि कम ८2नि eyoQf- Q. s ders At S IR B" gt ocat of NLirlomwrca‘agd \_b”. ला |
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Answer» p=1.5D f = 1/p f =1/1.5 since f is positive it is a diverging lens that is concave lens Then the defect of vision is myopia |
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| 9655. |
A balloon of mass M is descending with a constantacceleration g/3. When a mass m is released fromthe balloon it starts rising with the same accelerationg/3. The value of m is (Assuming that its volumedoes not change) :.2 (2)4(3) 4M(4) 2M |
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Answer» While descending R = M(g - a)R = M(g - g/3)R = 2Mg/3 While risingR = (M - m)(g + a)2Mg/3 = (M - m)(g + g/3)2Mg/3 = (M - m)4g/3M = (M-m)2M/2 = M - mm = M - M/2m = M/2 Mass to be removed is M/2. |
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| 9656. |
The equations of projectile are given by x36 t m and 2y 90 t 9.8 t? m. The angle ofprojection is:1) sin-1(4/5) 2) sin (3/5)3) sin (4/3) 4) n (3/4) |
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Answer» of the given option is correct. |
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| 9657. |
. Both the springs shown in figure (5-E2) are unstretched.If the block is displaced by a distance x and released,what will be the initial acceleration?k1k2Figure 5-E2 |
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| 9658. |
sin theata 25 degree |
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Answer» sin 25° is in 1st quadrant so it will be positivesin(25) 0.42261826 thanks |
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| 9659. |
75. If a capillary of radius r is dipped in water, the heof water that rises in it is h and its mass is M. If tdius of the capillary is doubled the mass of waterrathat rises in the capillary will be(1) 4M(2) 2M(3) M2 |
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| 9660. |
1. Air is filled in a bottle and it is corked at 35°C. If thecork can come out at 3 atmospheric pressure, thenupto what temperature should the bottle be heated(Ans. 651°C)in order to remove the cork? |
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Answer» according to Charles lawat constant volumeP1/T1=P2/T2P/273+35=3P/TT=924K651°C |
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| 9661. |
Set 03When an air bubble of radius r rises from |9.the bottom to the surface of a lake, its5rradius becomesTáking the4atmospheric pressure to be equal to 10 mheight of water column, the depth of thelake would approximately be (ignore theurface tension and the effect oftemperature)(2) 8.7 m(3) 9.5 nm(4) 10.5 m |
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| 9662. |
When an air bubble of radius r rises fromthe bottom to the surface of a lake, itsradius becomes . Taking theatmospheric pressure to be equal to 10 mheight of water column, the depth of thelake would approximately be (ignore thesurface tension and the effect oftemperature) :(1) 11.2 m(2) 8.7 m(3) 9.5 m(4) 10.5 m |
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Answer» hi hello which class this solov radius is 1 11.2m2 |
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| 9663. |
"Stability is inversely proportional to theheight of centre of gravity above the areaof the base." Explain |
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Answer» stability is indirectly proportional to the distance of the center of gravity of the body above the base.As the height of the center of gravity (C.G) increases the stability decreases and vice- versa. The centre of gravity of a body is the point from which the body can have perfect balance It can be considered as the centre of weight of the body. Normally in an adult man the C.G. in a standing position will be at 56.18 % of the height from the ground. and it will be at 55.14 % in adult women. e.g.; (If standing person raises his hands upwards, the C.G. will move high and stability decreases) |
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| 9664. |
what are agricultural practices |
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Answer» Agricultural practices are collection of principles to apply for farm production processes to get better agricultural products and the Agriculture practices are simply practices used in agriculture to facilitate farming. |
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| 9665. |
21 Density of a substance is directly proportional to its mass and inversely proportionalto its volume. Explain with an example. |
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Answer» Density = Mass/Volume. Mass = volume x Density. Volume = Mass/Density. There are 3 cases. Volume is kept constant. Density is kept constant. Mass is kept constant. First case:volume is kept constant. In this case, density has nothing to do with volume. The density increases with increase in mass and the rate of increase depends on the volume. For Example: Imagine two balloons. Both blown up to the same level(same volume) with one filled with air and the other with water. Obviously the balloon filled with water is heavier and thus more denser( and vice versa). Second case:Density is kept constant. In this case, volume has nothing to do with density. The volume increases with increase in mass but the rate of increase of volume when mass is added depends on the density. For Example: Imagine a container partially filled with water. When water is added to the already existing water, the density of water still remains same hut the volume has increased. Of course mass of the container after adding water is higher than the mass of the container before adding water. Third case:Mass is kept constant. In this case, yes, volume is inversely proportional to density. Not much explanation is needed here. For example: Imagine a squeezed sponge and an loosely left sponge(the sponges are identical). Here, volume of the squeezed sponge is less but it is more denser when compared to the free sponge whose volume is more than the squeezed sponge. Volume is constant and mass isproportional to density. Now if all the cooking gas in the same cylinder is transferred in a lager cylinder, the mass of gas will be the same, but its volume will increase anddensitywill decrease, this is becausedensityis inverselyproportional tovolume. |
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| 9666. |
Working of AC generator |
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Answer» A.C. generators or alternators (as they are usually called) operate on the same fundamental principles ofelectromagnetic inductionasD.C. generators. Alternating voltage may be generated by rotating a coil in the magnetic field or by rotating a magnetic field within a stationary coil. The value of the voltage generated depends on- the number of turns in the coil. strength of the field. the speed at which the coil or magnetic field rotates. |
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| 9667. |
work of Ac generator |
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Answer» Ans :- Generatoris an electricgeneratorthat converts mechanical energy. principle of anAC generatoranAC generator works. on the principle of electromagnetic induction in electromagnetic. induction when there is a relative motion between a coil and a magnetic field an electric. PLEASE LIKE AND SHARE THIS APP |
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| 9668. |
(1) Explain the construction and working of an electric generator (AC). Drawa neat labelled diagram. |
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| 9669. |
depend on g c) in versely proportional togd) directly proportional to g |
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| 9670. |
4 The essental dfference betwecn an Ac senerator and a dC enAC generator has an clectromagnet while a DOsenetatbi DC generator will geutrate a higher voltgeid AC generator will generate a higher voltage.id AC generator has slip rings while the DC generator hasa commuta |
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| 9671. |
hy Onhe moon?Explain why it is possible for a small animal to fallfrom a considerable height without any injury beingcaused when it reaches the ground. |
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| 9672. |
charges of 2 x 10'C and 3 x 10 C plauThe electrostatic force on a small sphere of charge 0.4 uC dueanother small sphere of charge-08μ0 in air is 0.2 N. (a) What ithe distance between the two spheres? (b) What is the force on thsecond sphere due to the first?1.2imonsinless ok up a Tabl |
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| 9673. |
1.What is the smallest eleclnelurteDeto0The electrostatic force on a small sphere of charge 0.4 μC due to another small sphere of charge-0.8 H C in air is 0.2 N. (a) What is the distance between the two spheres? (b) What is the force on thesecond sphere due to the first?INCERThold fixed at the three corners of an equilateral triangle of |
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Answer» Thank you |
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| 9674. |
What should you do during an earthquake to minimise injury to ourselves? Give an account of what we should do if weare indoor and if we are outdoors. |
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Answer» Drop down andtakecover under a desk or table. Be prepared to hold on until the shaking stops. Stay inside until the shaking stops and it is safe to exit. Stay away from bookcases and other furniture thatcanfall onyou. Stay away from windows and light fixtures. If you are outdoors during an earthquake: Drop to the ground in a clear spot away from buildings, trees and power lines. If you are driving – pull over, stop and set your parking brake.Avoid overpasses, bridges, power lines, trees, signs, buildings, vehicles and other things that may fall on your car. |
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| 9675. |
A projectile fired with initial velocity u at some angle 0 has a range Rilf the initiallocity be doubled at the same angle of projection, then the range will be)L.F(al2R(b)R/2(C)R(d14R |
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| 9676. |
BLEMAn aeroplane moving at a speed of 300 ms-1 isverticallyoint A at a height of 1.96 km when it releaseda bomb. If hits the target at B. Find the distance betweeA and B |
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| 9677. |
2.7 A student measures the thickness of a human hair by looki.g at it through amicroscope of magnification 100. He makes 20 observations and finds that the averagewidth of the hair in the field of view of the microscope is 3.5 mm. What is theestimate on the thickness of hair? |
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| 9678. |
(Ans.: 131250 J)e Ravi applied a force of 10 N andmoved a book 30 cm in the directionof the force. How much was thework done by Ravi?19(Ans: 3 J) |
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Answer» Force =F=10NDisplacement =S=30cm=30/100=0.3mWorkdone =? Formula to be used: Workdone =Force X displacement =10x0.3 =3N-m or Joules ∴Workdone is 3 joules sorry I have done mistake sorry I have done a mistake |
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| 9679. |
Modern periode table |
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Answer» Themodern periodic tableis used to organize all the known elements. Elements are arranged in thetableby increasing atomic number. In themodern periodic table, each element is represented by its chemical symbol. ... Columns of theperiodic tableare called groups. Elements in the same group have similar properties. thank u Themodern periodic tableis used to organize all the known elements. Elements are arranged in thetableby increasing atomic number. In themodern periodic table, each element is represented by its chemical symbol. ... Columns of theperiodic tableare called groups. Elements in the same group have similar properties. thanks mr vikram welcome if you any doubt kindly contact me at this number 7488655100 my WhatsApp number thank u n may I ask u one question plzz okkk ask me ............................ |
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| 9680. |
D(Find the total resistance between poiin figure.)veen points A and B in the combination of resistances as shown |
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Answer» ans to this question is 5ohm point between point A and B ony 3 ohm is there so total resistance will be 3 ohm the correct answer is 3ohm |
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| 9681. |
3.Calculate the amount of water (in g) produced b4. Explain Auf-Bau and Pauli's exclusion principl |
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Answer» Pauli Exclusion Principle, which states that two electrons cannot exist in the same location and thus electrons in the same orbital must have opposing spins. Hydrogen only has one electron in the 1s orbital and has a quantum number of 1s^1. Helium has two electrons in this field, so they must have opposing spins, and it has a quantum number of 1s^2. This spin factor is the fourth quantum number, ms, and is described as either +1/2 for a spin 'up' or -1/2 for a spin 'down The Aufbau Principlestates that lower energy orbitals fill before higher energy orbitals. For example, the orbitals in then=1energy level will fill up before the orbitals in then=2energy level. |
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| 9682. |
1& The unit vector perpendicular to2i+3j + k and B = 14i +j+5k3) 424)N42 |
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| 9683. |
what is Archimedes principal? and write any three application of it |
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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 wieght of the fluid that the body displaces.Upthrust = Buoyant force = Weiht of the displaced fluid. Application1.designing ships and submarines. 2.Hydrometers, which are used for determining density of liquids. 3.Lactometers, used to determine the purity of a sample of milk. |
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| 9684. |
6. Give Archimedes' principle. State its uses. |
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Answer» Archimedes'principle statesthat “When a body is immersed completely or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by the body.”Applications: A hydrometer usesArchimedes'principleto determine the density of any liquid |
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| 9685. |
what is Pauli exclusion principle |
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Answer» heat or electricityetc The Pauli exclusion principle refers to the fact that certain particles cannot be at the same place at the same time, with the same energy. Only fermions (examples are protons, neutrons and electrons) are bound by the Pauli exclusion principle, while bosons (an example is a photon - light beam) are not. किसी भीपरमाणुमें उपस्थित दोइलेक्ट्रॉनकी चारोंक्वाण्टम संख्याका मान समान नहीं हो सकता है। अत: किसी भी परमाणु में कोईइलेक्ट्रॉन अपनी एकअद्वितीय पहचान रखता है जो अन्य इलेक्ट्रॉनों से भिन्न होती है। |
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| 9686. |
what is Archimedes principle |
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Answer» Archimedes' principlestates that the upwardbuoyant forcethat is exerted on a body immersed in afluid, whether fully or partially submerged, is equal to theweightof the fluid that the bodydisplacesand acts in the upward direction at the center of mass of the displaced fluid. Archimedes' principle is alaw of physicsfundamental to fluid mechanics. It was formulated byArchimedes of Syracuse |
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| 9687. |
What is meant by calorimetry? State principle of calorimetry. |
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| 9688. |
State Archimedes principle. How Archimedes principle is used to design ships and submarines? Write the use oflactometers and hydrometers. |
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Answer» Archimedes' principle indicates that the increasing buoyantforcethat is applied on a body submerged in a liquid, whether partially or fully immersed, isequivalentto the mass of the fluid that the formdisplaces. One example of Archimedes ' Principle in action is seen in the tendency of steel ships to float, while a lump of steel will sink. Because the ship is buoyed up by a force equal to the weight of the water it displaces, distributed over a sufficiently large area, the ship floats. The key insight here is that the amount of water displaced depends on the volume of the displacing object, while the upward force depends on the weight of that water; as such, while a solid mass weighing the same as the ship would sink, the ship isn 't a solid mass; the steel thus occupies a greater volume, allowing it to displace enough water to equal the weight of the ship. Simply stated: the empty space inside the ship results in the average density of that ship being lower than the density of the surrounding water, allowing the ship to float. The principle applies to other mediums as well. For example, air can be considered as a fluid; an unfilled balloon will sit on the ground, but a balloon filled with helium such that the average density of the balloon is less than the average density of the surrounding air will float. |
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| 9689. |
ORExplain the cross product of two vectors. Give its examples and properties. |
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Answer» The vector product of two vectors a and b is given by a vector whose magnitude is given by|a||b|sinθ(where0∘≤θ≤180∘), which stands for the angle between the two vectors. Note that the direction of the resultant vector is denoted by a unit vector^nwhose direction is perpendicular to both the vectorsaandbin a way thata, band^nare oriented in right-handed system. Right-handed orientation happens when vectorais twisted in the direction of vectorb, then the direction of the unit vector^ngoes in the direction in which a right-handed screw would spin if moved in a similar manner. Also, these given vectorsaandbcannot be called null vectors or non-parallel in nature. The right-hand thumb rule gives a clear picture of the direction of the resultant vector. |
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| 9690. |
State principle of calorimetry. Mention the assumptions taken |
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| 9691. |
15. Theory of relativity reveals that mass can be converteinto energy. The energy E so obtained is proportional tcertain powers of mass m and the speed c of light. Guesa relation among the quantities using the methoddimensions. |
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| 9692. |
16. Lack of penetration is due toi. High currentii. Low currentiii. Short arc lengthiv. Too low welding speed. |
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Answer» 2 is the right answer Low current is correct low current is the answer of the following Low current is the correct answer option (ii) is the correct answer low current 2nd option is the correct answer. i.) High current is correct answer I) High current is correct answer I) is correct answer ii) two current is the right answer of the following |
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| 9693. |
. What is Geostationary satellite? State itsuses |
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Answer» A geostationary satellite is an earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers (22,300 miles) directly over the equator, that revolves in the same direction the earth rotates (west to east). A geosynchronous satellite is a satellite in geosynchronous orbit, with an orbital period the same as the Earth's rotation period. Such a satellite returns to the same position in the sky after each sidereal day, and over the course of a day traces out a path in the sky that is typically some form of analemma. Geostationary satellites are used for weather forecasting, satellite TV, satellite radio and most other types of global communications. These satellites have anorbitalperiod equal to the Earth's rotational period (one sidereal day) and thus appears motionless, at a fixed position in the sky, to ground observers. |
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| 9694. |
1. List the main characteristics of the image formed by a plane mimor. State three uses of a plane mirror |
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| 9695. |
two cliffs of height 120m &100.4m are separated by a horizontal distance of 16m.If a car has to reach from the first cliff to the second,the horizontal velocity of the car should be :1)16m /s 2)4m/s 3)2m/s 4)8m/s |
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Answer» thanks you |
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| 9696. |
gothe magnification of body ich Size tomDj 2. what über die the mag |
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| 9697. |
3. A man stationed between two parallel cliffs fires a gun. He hears the first echo after 1.5 s and the next after2.5 s. What is the distance between the cliffs and when does he hear the third echo? Take the speed of sound inair is 340 m/s. |
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Answer» Suppose the two cliffs are A and B which are at the distances x and y from the man respectively. Consider that the echo of 1.5 sec and 2.5 sec are produced by are produced by cliff A and B. 2x = 340 x 1.5 x = 255 m 2y = 340 x 2.5 y = 425 m Distance between the cliff = x + y = 680 m The third echo will be heard after 1.5 sec from the time when the second echo is heard. answer one more |
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| 9698. |
If bromine atom is available in the form of, say, two isotopes: Br (49.7%) and10.817935Br (50.3%), calculate the average atomicmass of bromine atom. |
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Answer» Average atomic mass of bromine= (79×49.7%) +(81×50.3%)=79×49.7/100 + 81×50.3/100=79×0.497+81×0.503=39.263+40.743=80.006u |
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| 9699. |
A mast stands bot een wo cliffs and fires a gun. He hearssee. The distance between the two cliffs is (speed of sound 340 ms)two successive echoe4) 1340 m12) 1330 m(3) 1360 m(4) 1310 |
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Answer» Distance of the person from the nearer cliff, d1= Vxt/2 = 330 x 3/2 = 495 m Distance of the person from the farther cliff, d2= V x t/2 = 330 x 5/2 = 825m Total distance between two cliffs = d1+ d2= 495 + 825 =1320m |
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| 9700. |
LEVEL -IIISINGLE CHOICE:4. Normal temperature of the body of a healthy person is 98.4°F. Its equivalent Celsius scale is1) 37°C2) 40°C3) 50°C4) 100°C |
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Answer» 37, human body temperature |
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