Explore topic-wise InterviewSolutions in Current Affairs.

a)24i-7j(ai+bj)=0 4a-3b=0 4a=3b a/b=3/4 Therefore THEVECTOR perpendicular to GIVEN vector... ... If AVECTOR = 3i^+4j^ and B vector = 7i^+24j^, what isthe vector having the ....

PLEASE FOLLOW ME AND MARK MY ANSWER AS THE BRANLIEST Explanation:Comparison of EMFs of two given cells using potentiometer : The potentiometer wire AB is connected in series with a battery (Bt), Key (K), RHEOSTAT (Rh) as shown in figure. This forms the primary CIRCUIT. The end A of potentiometer is connected to the terminal C of a DPDT switch (six-way key-double pole double throw). The terminal D is connected to the jockey (J) through a galvanometer (G) and high resistance (HR). The cell of emf E1 is connected between terminals C1 and D1 and the cell of emf E2 is connected between C2 and D2 of the DPDT switch.Let I be the current flowing through the primary circuit and r be the resistance of the potentiometer wire PER metre length.The DPDT switch is pressed towards C1,D1 so that cell E1 is included in the secondary circuit. The jockey is moved on the wire and adjusted for zero deflection in galvanometer. The balancing length is l1. The potential difference across the balancing length l1=Irl1. Then, by the principle of potentiometer,E1=Irl1....(1)The DPDT switch is pressed towards E2. The balancing length l2 for zero deflection in galvanometer is determined. The potential difference across the balancing length is l2=Irl2, thenE2=Irl2....(2)Dividing (1) and (2) we get,E2E1

The motion of a pendulum is a classic EXAMPLE of mechanical energy conservation. A pendulum consists of a mass (known as a BOB) attached by a string to a PIVOT POINT. ... However, the force of tension does not do work since it always acts in a direction perpendicular to the motion of the bob.

Please mark me as a Brainlist Explanation:We can connect the galvanometer to any one of the sources using a KEY in the circuit. If the galvanometer shows definite DEFLECTION in a given direction, the source taken is d.c. source. If the given source is a.c. source, the average deflection shown by the galvanometer will be zero. (B) We can also connect the electroplating equipment to any one of the source using a key in the circuit. If electroplating takes place, the source used is d.c. source. In CASE of AC source, SINCE the direction of current changes in direction periodically and alternatively, there is no definite shifting of the ions of the electrolyte and hence no electroplating takes place.

Question 1.Which of the following statements are true for pure SUBSTANCES?(i) Pure substances contain only one kind of particles(ii) Pure substances may be compound or mixtures(iii) Pure substances have the same composition throughout(IV) Pure substances can be exemplified by all elements other than nickel(a) (i) and (ii)(b) (i) and (iii)(c) (iii) and (iv)(d) (ii) and (iii)AnswerAnswer: (b) (i) and (iii)Question 2.Rusting of an article made up of iron is CALLED(a) corrosion and it is a physical as well as chemical change(b) dissolution and it is a physical change(c) corrosion and it is a chemical change(d) dissolution and it is a chemical changeAnswerAnswer: (c) corrosion and it is a chemical changeQuestion 3.A mixture of sulphur and carbon disulphide is(a) heterogeneous and shows Tyndall effect(b) homogeneous and shows Tyndall effect(c) heterogeneous and does not SHOW Tyndall effect(d) homogeneous and does not show Tyndall effectAnswerAnswer: (d) homogeneous and does not show Tyndall effectWhat is the name of the metal which exists in liquid state at room temperature?(a) Sodium(b) Potassium(c) Mercury(d) BromineAnswer: (c) MercuryWhich of the following elements is not a metalloid?(a) Boron(b) Silicon(c) Germanium(d) TungstenAnswer: (d) Tungsten5. If we PUT camphor in an open container, its amount keeps on decreasing due to the phenomenon of(a) Evaporation(b) Precipitation(c) Condensation(d) SublimationAnswer: (d) Sublimation6. Heterogeneous mixture in which the solute particles do not dissolve and remain suspended throughout the solvent and the solute particles can be seen with the naked eye is known as:(a) Colloidal solution(b) Super saturated solution(c) Sublimation(d) SuspensionsAnswer: (d) Suspensions7. In tincture of iodine, find the solute and solvent?(a) alcohol is the solute and iodine is the solvent(b) iodine is the solute and alcohol is the solvent(c) any component can be considered as solute or solvent(d) tincture of iodine is not a solutionAnswer: (b) iodine is the solute and alcohol is the solventWhen the liquid is spun rapidly, the denser particles are forced to the bottom and the lighter particles stay at the top. This principle is used in:(a) Centrifugation(b) Fractional distillation(c) Evaporation(d) TunnelingAnswer: (a) Centrifugation What is the name of the metal which exists in liquid state at room temperature?(a) Mercury(b) Bromine(c) Sodium(d) PotassiumMercury is ans.

Two Decimal Places RULE #1: If the LAST DIGIT in 2.645 is less than 5, then remove the last digit. Two Decimal Places Rule #2: If the last digit in 2.645 is 5 or more and the second to the last digit in 2.645 is less than 9, then remove the last digit and add 1 to the second to the last digit.

A TRAIN is MOVING with a velocity of 90 km h-'. It is brought to stop by applying the brakes which produce a retardation of 0.5 m s 2. Find : (i) the velocity after 10 s, and (II) the time taken by the train to come to REST. Ans. practis it

tion:In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can ALSO be described INTUITIVELY as a PUSH or a PULL. A force has both magnitude and direction, making it a vector quantity .

water is fed to an inward flow reaction flow turbine running at 180 rpm with VELOCITY of flow of 30 m/s . The diameter and width of the WHEEL at inlet are 1 m and 135 MM,respectively. Assuming the velocity of flow to be constant and radial discharge at inlet and OUTLET , find (1) work done per k N of water (2) power develope by turbine (3) head of water on the turbine (4) hydraulic efficiency of the turbine (5) draw velocity triangles.Explanation:

A pinhole camera is a SIMPLE camera without a lens but with a tiny aperture (the so-called pinhole) – effectively a LIGHT-proof box with a small hole in one side. Light from a scene PASSES through the aperture and PROJECTS an inverted image on the opposite side of the box, which is known as the camera obscura effect.

PLEASE FOLLOW ME Explanation:A goldsmith uses the outer part of the candle FLAME for melting GOLD and silver. This is because in this zone of flame, the temperature is the highest HELPING these metals to melt easily.

A.) 4 is the CORRECT ANSWER.

5:7 I THINK. I am not SURE...

moving coil galvanometer? A moving coil galvanometer is an instrument which is used to measure electric currents. It is a sensitive electromagnetic device which can measure low currents even of the order of a few MICROAMPERES. Moving-coil GALVANOMETERS are MAINLY divided into two types: SUSPENDED coil galvanometerPls Mark as BRAINEST answer and follow me pls

tion:In physics, a force is any INTERACTION that, when unopposed, will change the motion of an object. A force can CAUSE an object with mass to change its velocity, i.e., to accelerate. Force can also be DESCRIBED intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantit

the CORRECT answer is {3} option I.e,The MAGNETIC force is an example of CONTACT force

10kgf = 98 HOPE this HELPS...✌

A derived unit is called so because it is the product of two more BASIC units. The basic unit of area is the cubic meter (m³) for volume. By derived unit, it REFERS to any given quantity which cannot be measured directly with any device. For eg., We can't measure density of a SUBSTANCE with a RULE, or scale, or bucket.

:INITIAL angular velocity = 14 rev/sFinal angular velocity = 38 rev/sTime interval = 5sWe have to find angular acceleration of the wheel★ Angular acceleration is measured as the RATE of change of angular velocity of object.α = ω₂ - ω₁ / tα DENOTES angular accelerationω₂ denotes final angular velocityω₁ denotes initial angular velocityt denotes timeIt is an axial vector quantity having both MAGNITUDE as well as direction.Angular acceleration is a rotational analogue of linear acceleration.SI unit : rad/s²By substituting the given values;➝ α = 38 - 14 / 5➝ α = 24/5➝ α = 4.8 rad/s²

yfdugekyrsiysouyfpits in the iudoufojsihd

The ANSWER is a OPTION AMark me BRAINLIEST

correct OPTION is B 2F/3:EXPLANATION:PLZ Mark's me BRAINLIST

While playing football FRICTION helps our FEET to stable on GROUND, take kicks without slipping and run easily on playing surface. ... It ALSO helps the goalie grab on to the ball and for players to take throw INS and headers.mark as Brainialist answer plz

what is the question.Explanation:

hi i am khushi SARKAR from uttarakhand i love snakes my favourite CARTOONS are MIRACULOUS ladybug and cat NOIR and beyblade burst evolution

and B will experience equal UPTHRUST.But why ??This can be easily explained with Archimedes' Principle.In short , the principle explains upward buoyant FORCE experienced by the object will be DIRECTLY proportional to the volume of fluid displaced by the object.Here, both objects have equal dimensions (so, equal volume), and both of them have been FULLY immersed in the liquid.So, they will displace equal amount of fluid (equal volume of liquid displaced).And, as per Archimedes' Principle, they will experience equal upthrust or buoyant force._____________________However, the body which is present at a greater depth will experience higher hydrostatic pressure as per Pasteur Law. HOPE It Helps.

hí to you not BRUSH ️️️️️️ je ami DOOR is locked to you and the same IP and Google guidelines to be the BEST 3

please mark me as BRAINLIST Explanation:hope it helps you to UNDERSTAND Stay home,stay SAFE

Support reactions are Vay = wl/2 = Vby.Cut s/n and TAKE the moment at pont zero.M = - (wx^2/2) +wlx/2.Max moment at mid pnt l/2.M = Wl^2/8.For UNIFORMLY distributed LOAD moment VARIES PARABOLICALLY not linearly.

Cokkkkkkkkkmmm ususueududududu

question :-A composition of a organic COMPOUND found to contain 39.9% of CARBON, 6.7% of hydrogen  and remaining being oxygen. The molar mass of the compound is 180. DETERMINE its empirical formula and molecular formula.Solution :-Given :-Percentage composition of carbon (C) = 39.9%Percentage composition of hydrogen (H) = 6.7%Percentage composition of oxygen (O) = 100 - ( 39.9 + 6.7 )                                                                  = 100 - 46.6                                                                  = 53.4%Simplest RATIO :-Empirical formula mass = 12 + ( 2 × 1 ) + 16                                        = 12 + 2 + 16                                        = 30 We know :-Here,Molecular formula =

According to Dalton, atoms of different elements combine in simple whole NUMBER ratios to FORM compounds. This is not observed in complex organic compounds like sugar (C12H22O11). The theory FAILS to explain the existence of ALLOTROPES; it does not account for differences in properties of CHARCOAL, graphite, diamond.

Initial velocity of bullet will be approximately 1258.46 m/sExplanation:Given,Mass of bullet, m = 20 g = (20 / 1000) kg = 0.02 kg Initial velocity of bullet it is travelling with = V Mass of wooden BLOCK, M = 4 kg The wooden block is suspended from two light strings. Bullet on firing GET EMBEDDED into the block.  (We will assume strings massless)Height to which block-bullet combination is rised, h = 2 m To find,Initial velocity of bullet, v =?Solution,Let, the velocity of block-bullet combination just after the collision be V & the initial velocity of wooden block would be, u = 0then,By the law of conservation of linear momentum → Initial momentum before collision = Final momentum after collision→ m v + M u = m V + M V → m v + M ( 0 ) = V ( m + M )→ m v = V ( m + M )→ V = ( m v ) / ( m + M )→ V = ( 0.02 v ) / ( 0.02 + 4 )→ V = ( 0.02 v ) / 4.02    ______equation(1)Therefore, we have the the velocity of block-bullet combination after collision.Now,By the law of conservation of mechanical energy → Kinetic energy of system = Potential energy of system→ 1/2 ( m + M ) V² = ( m + M ) g h [ where g is ACCELERATION due to gravity ]→ 1/2 ( 0.02 + 4 ) V² = ( 0.02 + 4 ) ( 9.8 ) ( 2 )→ V² = 39.2Using equation (1)→ [( 0.02 v ) / 4.02]² = 39.2→ 0.0004 v² / 16.1604 = 39.2→ v = 1258.46  m/sTherefore,Initial velocity of bullet will be approximately 1258.46 m/s.

Linear EXPANSION means change in ONE dimension (length) as opposed to change in volume (volumetric expansion). To a first APPROXIMATION, the change in length measurements of an object due to thermal expansion is related to temperature change by a COEFFICIENT of linear thermal expansion EXPLANATION:I hope it help for you

the DISPLACEMENT will be zero in one complete REVOLUTION(final point and initial point should COINCIDE) Explanation:HOPE it helps. plz MARK my answer as brainliest... follow me tooo