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pressure will increase

Note :-Interchange two rows or columns changes the sign: -> -1 * det(A)

Hence in the expression provided, determinant is multiplied by a factor -1 , when two of it's rows or columns are interchanged.

Playing music in a closed room might create echo which could be undesirable while listening to music.

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0.28% (0.01/3.51 × 100)%

1 km = 1000m1 h = 3600 sso 72 km/ h = (72×1000)/3600 = 20m/s

it will be decreasingas we know that rfsintheta= Torqueas theta decreases then torque decreases

dA/dt is constant, since the area is swept out at a constant rate.

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Beaker B would be more warmer than beaker A

Reason:

As we know that heat transfers from higher temperature to lesser temperature.

For Beaker A,

As we pour 30°C water in 70°C water, the temperature contrast is enormous so water will cool instantly and for five minutes it'll cool against distinction with room temperature.

For Beaker B,

After waiting for 5 minutes with 70°C water in room, so that will cool it gradually. Additionally after 5 minutes we will add 30°C water to it, however temperature distinction will be little so cooling will be truly moderate.

In this manner on the off chance that we measure temperature quickly following 5 minutes, beaker B will be more warmer than A.

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Objects will not change their velocities unless they are forced to byforces. That is howGalileocame up with theconceptof inertia. Inertia is that property of matter that opposes changes in motion. ... The velocity of an object will not change unless you push or pull on the object.

Option D is correct answer.

Explanation:

The displacement of the particle exhibiting SHM varies sinusoidally with time,t. However, the degree of sinθ and cosθ terms is 1.

Those Reactions in which hear is released along with formation of products are exothermic reactions.

In exothermic reactions, the bond energies of the reactants are less than the bond energies of the products. As a result, less energy is needed to break the bonds in the reactants than is released during the formation of the products. This energy difference between reactants and products is often released as heat.

i)Power= Work/TimeDimensional Formula of Work= M1L2T-2Divide it by Time T1So Dimensional Formula of Power= M1L2T-3ii)Force = Mass x AccelerationAcceleration = Change in Velocity/Time TakenAcceleration = M0L1T-2Substituting this in Force formula we getForce = Mass x AccelerationForce = M x M0L1T-2

So Dimensional Formula of Force= M1L1T-2

iii)PEMITTIVITY= (CHARGE)^2 /(FORCE)*(DISTANCE)^2

=[TA]^2 / [MLT^ -2] [L]^2

=[TA]^2 / [ML^3T^ -2]

=[M^ -1 L^ -3 T^2+2 A^2]

= [M^ -1 l^ -3 T^4 A^2]

option c glass is the answer.The speed ofsound is highestin solid. The speed ofsounddepends on the density of themediumthrough which it is travelling. Thehigherthe density of themedium, the faster is the propagation ofsound. Since density of solids ishigherthan that of liquids and gasees, sosoundtravels faster in solids.

ThepowerP measured in Watt is defined by the Energy produced in a specific time… ... The SI unit ofPowerbeing Watt has theDimensional formulaM1L2T-3.

We should know that how concept of force and its formula came into play. Dimension of force will besameas the product of dimension of mass and acceleration. Dimension of mass is 'M' and dimension of acceleration is 'LT^-2'. Hence dimension of force will be MLT^-2.

Thespeed of lightin a given material is related to a quantitycalledthe index of refraction, n, which is defined as theratioof thespeed of lightinvacuumto thespeed of lightin themedium: index of refraction : n = c / v. Whenlighttravels from onemediumto another, thespeedchanges, as does the wavelength.

Ratio of speed of light in vacuum to the speed of light in medium is called the Refractive index of that medium

An electrically charged object can attract objects that are uncharged. Consider the following figure -When a glass rod is rubbed against a silk cloth, then glass object acquires positive charge and silk cloth acquired negative charge. The amount of charge acquired by both the object must be equal, so that the net charge of the system is zero. This is so because, according to the law of conservation of charges, charge can neither be created nor can it be destroyed

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299,792,458 metres per second.

Meaning of gauge :-

A measurement of the width of something or of the distance between two things

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Potential differemce=12vcurrent = 2.5mA∵1 A=1000m∴2.5mA=0.0025 A

∵R=V/I =12/0.0025 =4800 ohm

A rock sitting on the ground is atrestwith respect to the earth, but the earth is turning and moving around the sun and the sun is moving through space, etc, so we have to state the framework. So yes, in that sense abody canbe atrestand inmotion at the same time. But not both in thesameframework

if we travel by any vehicle than our body is at rest but our surrounding are in motion

a man observe that outside trees to be in motion and and a man house outside the bus observe that the

If a body travel by a car ,bus etc then you are in rest but vehicle is in motion

Yes, with respect to place

A concrete wall of a thickness of 1 m of a dam can withstand a side pressure of 10^5 Pa. How do I find the thickness of sidewall at the bottom of the water dam at a depth of 100 m?

this is a solution for similar question. kindly follow the methodology.

The name given to 6.022× 1023 number of particles is Avogadro's number.

6.022× 1023 number of particles is called as Avogadro's number. It is defined as the number of particles in mole of any substance.

This is because if it travels 1 metre in 10 seconds then in 60 seconds i.e. in 1 minute it would travel 6 metres because 60/10=6.Now we have to multiply 6 with 60 because 1 hour has 60 min.So, 6*60=360 metres or .360km/hr which is it's speed.

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It will experience more bouyant force in a saturated solution because the it's density is more than water.bouyant force on cube in water = 5^3*d*g=125dgwhen side is reduced to 4 cm bouyant force =4^3*d*g=64dgratio of both - 125:64bouyant force will reduce