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(μ= 1.50let θc be the critical ANGLE for glasssin θc/ SIN 90= 1/xsinθc= 1/1.5=2/3θc= sin⁻¹[2/3]For TOTAL internal reflection 90° -Ф>θcθ<90°=θcθ

tical FIBRE (μ = 1.72)glass COATING (μ= 1.50)CRITICAL angle:sin i/ SINR = μ2/μ1 sin c/ sin 90 =1.5/ 1.72= 75/86 c= sin⁻¹(75/26)

ng to the FIGURE, x/3 = COT r …(1) sin i/ sin r = 1/1.33= 3/4 sin r = 4/3 sin i = 4/3 x 3/5 = 4/5  SINCE in figure sin i= BC/Ac = 3/5] cot r= 3/4 ----------------2from 1 and 2 x/3= 3/4 x= 9/4= 2.25cm RATIO of REAL and apparent depth = 4: (2.25) = 1.78

Let x = DISTANCE of the IMAGE of the eye FORMED above the surface as seen by the fishH/x = Real depth / APPARENT depth = 1/μx= hμso distance of direct image = H/2 + μH= H(μ +1/2)similarly image through mirror = H/2 +( H+x)3H/2 +μH=H(μ+3/2)B) H/2/ Y= uμy= H/2μwhere y= distance of image of fish below the surface  direct image = H+y=H+H/2μ=H(1+1/2μ)Another image of fish will be formed H/2 below mirrorso real depth for hat image becomes =H+H/2= 3H/2apparent depth = 3H/2μso distance of image from eye= H+3H/ 2μ= H(1+3/2μ)

of the IMAGE will be ERECT and of same SIZE .

ve it by yourself

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is EQUATION is VOLT not VELOCITY.

+ 2gH0 = 20 X 20 - 2 x 9.8 x HH = 20.4 m

er, (micro or milli) Ammeter,RESISTANCE boxes (1Ω – 10kΩ and fractional), wires, digital voltmeterand milli-ammeter or multimeter, power SUPPLY (0–5 VOLT). Voltmetermeasures voltage drop acrossresistance by putting it in PARALLEL to the resistancefrom above it is clear that milivoltmetre has SMALLER resistance

ate,◆ Answer-F = 12 N◆ Explaination-# Given-I = 100 AL = 30 cm = 0.3 mB = 0.4 Tθ = 90°# Solution-Force acting on CONDUCTOR in magnetic FIELD is given by-F = IlBsinθSubstitute values-F = 100 × 0.3 × 0.4 × sin90F = 12 NTherefore, force acting on current carrying conductor in given magnetic field is 12 N.Hope it helps...

swering because Suggested Edits to a previous answer, which lays the argument in similar lines, were not considered.The point charge in question is creating an electric field which is radially outwards from the point charge. Now you have placed a conducting metal near it. The electric field vectors now get bent in such a way that now they are normal to the surface of the conductor at every point on the surface. The question is why.A conductor means it has ample free charges: ELECTRONS. This is what sets them apart from other materials like dielectrics where all the electrons are bound to the parent atoms. In conductors, a good fraction of the electrons in the material are free to MOVE around. What that means is that, once you have an electric field anywhere inside the conductor, the free charges move around and nullify it. Now imagine having two components of an external electric field (in this case produced by the point charge outside) on the surface: one tangential to the surface and the other perpendicular to it. DUE to the same reason as above, the mobile charges will nullify the tangential component. However, they cannot move outof the surface (they are bound to the conductor as a whole, by a threshold energy, called the ‘work function’), i.e. motions in the directions to the surfaces are not allowed. Hence this component of the field remains, and the ‘field lines’ are perpendicular.There are two caveats in the above answer:I am talking about ‘motions’ of electrons, which is not strictly true in the accurate DESCRIPTION of electrons, which is quantum mechanics. However, the general picture I have painted is valid even in that picture, the description being via wave-functions of the ‘electron cloud’ and things like that.The ‘motion’ of the electrons (accurately, adjustments of the wave-functions of the electron-cloud) happen in finite amount of TIME, but they are so small that for all practical purposes, such time-scales are negligible.

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nomenon of TOTAL INTERNAL reflection of light is used in manyoptical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes etc. The brilliance of a diamond is DUE to total internal reflection. OPTICAL fibre works on the PRINCIPLE of total internal reflection.

n the intelligibility of female compared to male voices, and studies on the relation between acoustic parameters (such as F0) and speechunderstanding are rather scarce and indirect. However, particularly in information‐providing SERVICES, female voices are frequently used, whereas, in speech‐technology applications, they are often excluded, probably due to inadequate methods for analyzing female voices. Why Are Girls' Voices Usually Higher Than Boys' Voices?It’s all thanks to your vocal cords. These are muscles that stretch like rubber bands across your voice box, or larynx (LAIR-inks), which is located at the back of your throat. Whenever you say hello to a friend or answer a question in class, you’re using your vocal cords to speak. The size of your vocal cords is what determines your voice’s pitch, which is its level of highness or lowness.When you speak, air pushes from your lungs through your vocal cords and out of your mouth. The air makes the vocal cords vibrate, or move back and forth really fast. Picture the strings on a guitar. The vocal cords' vibration makes sound, just like a strummed guitar does. And like guitar strings, smaller cords create a higher sound. Girls' vocal cords are usually shorter and thinner than most boys’, which is why their voices sound higher. This difference in pitch is even more NOTICEABLE in grown-up men and women.When we get a little OLDER, you'll experience something called puberty (PYOO-bur-tee). It's your first step towards being an adult. Boys' bodies start producing a lot of testosterone (tes-TOSS-tuh-rone). This is a hormone. It acts like a chemical messenger to different parts of the body. Testosterone tells the body to change in all sorts of ways, like making bigger muscles and growing hair in new places. It also makes a boy's vocal cords grow thicker and longer. That makes his voice sound deeper. Girls' bodies produce testosterone too, but not as much as boys' do. Their bodies also produce ANOTHER hormone called estrogen (ESS-tro-jen). These hormones make girls' vocal cords get bigger during puberty, but they don't grow as big as boys'. So girls' voices sound higher.hope this helps you ..plz mark as BRAINLIEST

are seen in desert AREA. We SEE things which are not REAL this mirage is FORMED due to reflection of lightHope it Will help youMark me BrainiestThanks for QUESTIONFOLLOW Me

se is due to inward pull of surface tension acting on the surface which PUSHES the liquid into THECAPILLARY tube. It is because of the same reason that oil rises into the Wick of an oil lamp or water below the surface of the EARTH rises in the plant or ink in a BLOTTING paper.

the PERSON moves uniform speed the direction of the person keeps changing at each and EVERY point HENCE velocity changes hence it is accelerated

istance/timeconvert KM in m (SI UNIT)60*5/18

s PLUS than CONVEX LENS

is not BASED upon any ASSUMPTIONS ABUT the VARIATIONSOF with the FREQUENCY

K.E of a projectile at its maximum height?Still have a question? ASK your own!What is your question?15 ANSWERSShivang Verma, StudentAnswered Aug 3 2017It depends UPON whether the projectile is vertically UPWARDS or at an angle with HORIZONTAL.1: If body is moving vertically upward then it would definitely be zero at the top most point since there is only vertical velocity applied to the body (in Y direction). Thus at the top most point the kinetic energy becomes zero as “Ke=1/2mv²” and v(velocity) is zero here. Instead entire kinetic energy changes to potential energy.2. If a projectile is PROJECTED at some angle to the horizontal then the velocity wouldn't be zero at the top most point. Since Ke=1/2*mv² and here the velocity is the resultant of two velocities at horizontal direction and vertical direction which is given by the parallelogram law of vector.

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y ANSWER is too LONG

, SPEED= DISTANCE / timeHere,distance = 8mTime TAKEN is GIVEN as:t = 10/6 secsSo,Speed = 8/(10/6) = 4.8 m/s

nd...*_*MATHEMATICS is known as the QUEEN of SCIENCE...And in the second... way:-In Europe during the HIGH Middle Ages, schools of higher learning utilized the trivium (grammar, logic, and rhetoric) and quadrivium (arithmetic, geometry, music, and astronomy) of classical liberal arts. It was in this environment that theology was NAMED “queen of the sciences.”hope its help U...*_* my frnd...*_*-

is emitted from the atom when the ELECTRON jumps from one orbit to another closer to the NUCLEUS.  When an electron jumps from orbit 'n'= 3 to orbit n = 2   producing a PHOTON of red light with an energy of 1.89  EV  (electron volts)   and a wavelength of 656 nanometres

yhä: 542 KILLS (705 UNCONFIRMED)

momentum conservedconservation of KINETIC energylet v and v be velocites of the bigger and smaller objects after collision∴ 10×5 = 10×v + 0.001 × VAND 1 by 2×10×5² = 1 by 2 × 10 × v² + 1 by 2 × 0.001 × v²v  ≈ 10 m/s

st verifiable CLAIM for a practically used bicycle belongs to German BARON Karl VON Drais, a civil SERVANT to the Grand DUKE of Baden in Germany. Drais invented his Laufmaschine (German for "running machine") in 1817, that was called Draisine (English) or draisienne (French) by the press.

IS HELPS YOU!!!

e here's UR answeraccording to zeroth LAW of thermodynamics," if any TWO systems A nd B are in equilibrium with the third SYSTEM C separately then they are in equilibrium with each other."

t capacity of a defined system is the amount of heat needed to raise the system's temperature by one DEGREE. This is different when the heat is supplied under constant pressure and constant volume (no expansion) condition.During constant volume, no expansion of the fluid occurs. But in constant pressure some amount of work is utilized for expansion process. At constant pressure, some of the energy you put in goes into RAISING the temperature (internal energy) and some of it goes into doing work by expanding the ideal gas.This applies for compressible fluids ( gas) alone. Liquids and solids can be considered to be incompressible since the amount of work utilized for expansion is very very negligible.For solids and liquids, CP = Cv = CNo distinct heat capacity values at constant pressure and temperature.What are Heat Capacity C, CP, and CV?The molar heat capacity C, at constant pressure, is represented by CP.At constant volume, the molar heat capacity C is represented by CV.In the following SECTION, we will find how CP and CV are related, for anideal gas.The relationship between CPand CV for an Ideal GasFrom the equation q = n C ∆T, we can say:At constant pressure P, we haveqP = n CP∆TThis value is equal to the change in ENTHALPY, that is,qP = n CP∆T = ∆HSimilarly, at constant volume V, we haveqV = n CV∆TThis value is equal to the change in internal energy, that is,qV = n CV∆T = ∆UWe know that for one mole (n=1) of an ideal gas,∆H = ∆U + ∆(pV ) = ∆U + ∆(RT) = ∆U + R ∆TTherefore, ∆H = ∆U + R ∆TSubstituting the values of ∆H and ∆U from above in the former equation,CP∆T = CV∆T + R ∆TCP = CV + RCP – CV = R

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