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e₁= BVR e₂₌BVRtotal will be 2BVR

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Inideal gas internal energydepends only on temperature ofgasbecause the intermolecule bonddoesnot exist inideal gas. But inreal gas internal energy issum of potential and kineticenergy. Kineticenergydepends on intermolecule bonds and kineticenergydepends on temperature.

Its 1.667 thanks for raising the doubt

Amount ofheatenergy required to raise the temperature of one mole of. a substance by one kelvin is called 'Molar specific heat'".

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9)The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but can be neither created nor destroyed

10)

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upon adding 2 mole of a gas with , 4 moles of another gas the total moles will be 6 moles

now for gas1, using gas equationPV = 2*R* T°

=> 2 = PV/RT°

for gas2 => PV = 4*R*(2T°)=> 4 = PV/2RT°

now adding both 2+4 = 6 => but on adding=> PV = 6*RT' => 6 = PV/RT'

and, PV/RT° + PV/R(2T°) = PV/RT' => 1/T° + 1/2T° = 1/T' => 1/T°(1+1/2) = 1/T'=> 3/2T° = 1/T'=> 2T°/3 = T'

so, the new temperature T' = 2T°/3.

but in book answer is 5/3T°

See this , if P and V are constant then,

n1T1 + n2T2 = ntotal*(T')

=> 2*T° + 4×(2T°) = (4+2)T' => 10T° = 6T'

=> T' = 10/6 = 5/3T°

but that approach should also be correct.. because here it is not mentioned that volume is constant or changing..

but use this as solution..

Applications of Electromagnets

A branch of physics deals with electric current or fields and magnetic fields and their interaction on substance or matter is called Electromagnetism. Electromagnetism has created a great revolution in the field of engineering applications. In addition, this caused a great impact on various fields such as medical, industrial, space, etc.

Household appliances

Industrial Applications

Magnetic Levitation Trains

Communication System

Medical System

All molecules in liquid do not take part in evaporation.

Because Evaporation is a process in which the surface turns into vapour. lesser the bottom.

In boiling, Less the surface molecules take part and more the bottom molecules takes part.

quality factororQfactoris adimensionlessparameter that describes howunderdampedanoscillatororresonatoris. It is defined as the ratio of the peak energy stored in the resonator in acycleof oscillation to the energy lost perradianof the cycle.[1]Q factor is alternatively defined as the ratio of a resonator's centre frequency to itsbandwidthwhen subject to an oscillating driving force. These two definitions give numerically similar, but not identical, results.[2]HigherQindicates a lower rate of energy loss and the oscillations die out more slowly. A pendulum suspended from a high-quality bearing, oscillating in air, has a highQ, while a pendulum immersed in oil has a low one. Resonators with high quality factors have lowdamping, so that they ring or vibrate longer.

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Velocity = dispacement / timeSpeed = distance / time

a) when he jogs from A to B on a straight road,displacement = distance = 300mtime = 2 minutes 30 seconds = 150 s

velocity = 300/150 = 2 m/sspeed = 300/150 = 2m/s

b)when he jogs from A to B and turns back to C,displacement = 300-100 = 200mdistance = 300+100 = 400mtime = 3 minute 30 second = 210 s

velocity = 200/210 = 20/21 m/sspeed = 400/210 = 40/21 m/s

Velocity = dispacement / timeSpeed = distance / time

a) when he jogs from A to B on a straight road,displacement = distance = 300mtime = 2 minutes 30 seconds = 150 s

velocity = 300/150 = 2 m/sspeed = 300/150 = 2m/s

b)when he jogs from A to B and turns back to C,displacement = 300-100 = 200mdistance = 300+100 = 400mtime = 3 minute 30 second = 210 s

velocity = 200/210 = 20/21 m/sspeed = 400/210 = 40/21 m/s

option 3 is the answer.

phosphorus is generally storedin water, because it is the reactive and non metal element. If it is left in open air, it reacts with oxygen of air and will cause fire. So in order to protect it, it should bekeptin water.

energy has dimension of E = ML²/T² M1 = 1 kgL1 = 1mT1 = 1 sec

And M2 = 10gL2 = 10cmT2 = 10sec

so , the value of energy will be reduced by = M(1000/10) * L(100/10)² *T(1/10)-² = 100*100*100 ML²/T².= 10^6*(ML²/T²)

so, option A.

up to 49 brackets, number of numbers covered will be1+2+3+...+49= 49*50/2= 1225

50th bracket will have numbers 1226,1227,.......1275 (50 numbers)

sum of these 50 numbers will be (50/2)*(1226+1275)= 26*2501=65225

Option Awave velocity is not a characteristic of musical sound.

answer is(A) wave velociy

tick the sentence which is not of comon noun

(a)Two narrow sources of light are said to be coherent if they emit waves having. the same wavelenght (or frequency), the same amplitude, and. a constant phase relation between them.

Two sources of emitting light waves of same frequency or wavelength and of a stable phase difference are required to see interference pattern and we can obtain such nature of light waves from coherent source. So, we require coherent sources to produce the interference of light.

(b) Characteristic features are as follows:1) IM Young's slit experiment we get fringes of same intensity while in diffraction pattern we get fringes with centre fringe of maximum intensity and others are of decreasing intensity.2) In young's experiment all the fringes are at euqidistant while in diffraction pattern they are not at same distance.3) In diffarction complete interference takes place when path length is an intregal multiple while in young's it is multiple of half integral multiple.

Total cards 261st

Multiple of three r 15 and 30Probability =2/261/13

2nd

divisible by 5 10 r =5, 10,15,20,25,30So total is 6Not divisible by 5 and 10 r 20Probability =20/2610/13

Here Xl= Xcso in resonancemore current will flow through Rsoeither B or D

c) is the correct answer

Option-Das in cause of resonancexl= xc

The downward force acting along the plane is mg×sinα which is equal to the friction force between block and the plane.

If a line is open circuited or very lightly loaded at the receiving-end the voltage at receiving-end may become greater than voltage at sending-end. This is known as Ferranti Effect and is due to the voltage drop across the line inductance being in phase with the sending-end voltages.

For transmission lineAD= 1+ BCwhere a b c and d are the transmission parameters

Ionosphere, a layer of electrically charged particles called ions that help in radio transmission. radio waves for transmitted from earth are reflected back to the earth from the ionosphere, thus helping in radio and telecommunication.

For large TV coverage, the transmission of TV signal is done from a tall antenna.Consider a TV antenna OP of heighth. The transmitting signals cannot be received beyond points R1and R2. This is due to curvature of earth.Clearly, OR1and OR2are the maximum distances, from the antenna, upto which the transmission signal can be received.Let OR1= OR2= d [d is half the total range]The relation between heighthof the TV antenna and the maximum distancedupto which the TV signal can be received can be derived on the basis of geometrical considerations.From right – angled triangle CR2P, CP2= CR22+ PR22…. (1)In right – angled triangle POR2, PR22= h2+ d2[Note that ∠POR2can be taken as right angle]Also, CR2= CO = R and CP = R + hFrom Equation (1) (R + h)2= R2+ (h2+ d2)

R2+ h2+ 2Rh = R2+ h2+ d2ord=2Rh−−−−√It is clear from this equation that if h is large, d will be large. This explains as to why the television broadcasts are made from tall antennas.

time =2 second sdistance=Slet time be the gravity of that I area

therefore distance=speed ×timeS=2×10=20m

thank you 😊

angle of shear = ɸ = (rɸ /L)r = radius = 4mm = 4 × 10–3mθ = 30° = 30 × (π / 180) = (π/6) rad

L = 1 m

henceɸ = {(4 × 10–3× {π/6}) / 1} = 2.09 × 10–3radi.e.ɸ = 2.09 × 10–3rad= {2.09 × 10–3× (180 / π)}°= 0.12°

Let tension be T , The horizontal component of T will = F => T/√2 = mg so T = √2mg

option C.

but torque being a vector quantity...how does cos comes into picture ??

c) is the correct answer