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here the radius of path is √4 = 2m

and acceleration = v²/r

so a = 2*2/2 =2m/s².

Time taken to complete 1 revolution = 1/140 sec

Angular velocity =ω = 2∏ / T= 2 * 22 / 7 * 140 = 880 rad/s

Answer: 1.880 rad/s

x= 180-60 (linear pair) = 120y = 180-100 (linear pair) = 80 z = 180-10 { linear pair} = 170w= 360-(60+80+170+85) = 35

Force at work here (gravity) is also dependent on the mass

gravity acts on a body with mass m with

F=mgF=mg

you will plug this in to

F=maF=ma

and you get

ma=mgma=mg

a=ga=g

and this is true for all bodies no matter what the mass is. Since they are accelerated the same and start with the same initial conditions (at rest and dropped from a height h) they will hit the floor at the same time.

Hence,option (a) a₁=a₂ is correct.

Option (2) is correct.

1

3-methyl pentane

A car is moving is moving from rest , it means intial angular speed of wheels , ω₀ = 0 wheels of car rotates 360 times per minute means angular speed after 1 minutes , ω = 2πn/T = 2π × 360/60 rad/secω = 2π × 6 = 12π rad/sec

Now, use formulaω = ω₀+ αt Here α is angular acceleration Given, ω = 12π rad/s , ω₀ = 0 rad/s and t = 30 sec ∴ 12π = 0 + α × 30 α = 12π/30 = 2π/5 rad/s²

angular velocity after 30 sec ω' = ω + αt = 12π + 2π/5 × 30 = 24π rad/s

Polarizationis the property of wave that can oscillate with more than one orientation. A light wave that is vibrating in more than one plane is referred to as unpolarised light.

The process of transforming unpolarized light into polarized light is known aspolarization of light.

Circular polarization-The electric field of light consists of two linear components that are perpendicular to each other, equal in amplitude, but have a phase difference of π/2. The resulting electric field rotates in a circle around the direction of propagation and, depending on the rotation direction, is called left- or right-hand circularly polarized light.

the option 3is the correct answer

accelerationis3.5, and initial velocity is4

Option 3 is correct answer

a=1.5 is correct ans

option 2 is correct answer

option 1 correct ✔ answer

unable to understand

how you do last step

wrong answer I also say first again

with the help of symmetry we first molded it assuming the AB as a reference and then we keep doing it untill we could minimize it

all resistance are having value R

Current = Charge/Time= 4/2 = 2 A

5 upon 11A, 5 upon 11A

option 5_11A. 5_11A is correct answer

Total resistance of the circuit is R + (4R*2R)/(4R+2R) = R + 8R/6 = R+4R/3 = 7R/3

now, current = E/(7R/3) = 3E/7R

now P.D across 2R = E - R*i = E-3E/7 = 4E/7

option 2

An electrostatic potential is the amount of work needed to move a unit of positive charge from a reference point to a specific point inside the field without producing an acceleration.

SI unit: volt

A windmill is a mill that converts the energy of wind into rotational energy by means of vanes called sails or blades.It converts wind energy to electrical energy

Yes, various forms of energy are interconvertible. Look at the following examples.

Electrical energy is converted into sound energy in a loudspeaker.Electrical energy is converted into mechanical energy in a motor.Mechanical energy is converted into electrical energy in a generator.

The answer is Option A.

Force of buoyancy is given by

Fb = Weight of displaced water

= mg

= ρV g

where ρ = density of the water

V = volume of displaced water = volume of block (here)

g = acceleration due to gravity

Given that,

v= 250 cm^3

g = 981 cm/s2

ρ = 1 g/cm3= 245250dyneor 245250/100000= 2.45N

And the acceleration due to gravity is constant on the object thoughout its flight. So the acceleration of the projectile is equal to the acceleration due to gravity,9.81meters/second/second, from just after its thrown, through its highest point, and until just before it hits the ground.option a

Air pressure is dependent on the temperature of air

pressure is the correct answer

pressure is the best answer.

pressure is the correct answer

pressure is the best answer

vapour holding capacity is your answer

pressure will the answers

Pressure is the correct answer

(i) When it strikes ground, its PE is zero and after bouncing, its potential energy increases gradually.(ii) At the time it strikes the ground, it has maximum KE and after it bounces, its KE starts changing into potential energy.(iii) The ultimate or total energy remains constant at any point of time during the motion.

but answer is option d

Ifwarmmoistairrises, it will expand andcool. As itcools, therelative humiditywill increase and water will condense. It can then fall back to the earth as precipitation

a conducting wire or thread with a high melting point, forming part of an electric bulb or thermionic valve and heated or made incandescent by an electric current

Filament is thin wire to conduct a electricity like in bulb....... S

This wire is called afilament. Thefilamentis the part of the light bulb that produces light. ... When electric current goes through thefilament, thefilamentglows. It may also be known as the electron emitting elementin a vacuum tube.

A battery is an electrochemical cell (or enclosed and protected material) that can be charged electrically to provide a static potential for power or released electrical charge when needed.

A substance that cannot be broken down into simpler substances by chemicalmeans. Anelementis composed of atoms that have the same atomic number, that is, each atom has the same number of protons in its nucleus as all other atoms of thatelement.

question is incomplete....

Metallic characterrefers to the level of reactivity of a metal.Metalstend to lose electrons in chemical reactions, as indicated by their low ionization energies.

न्यूटन का पहला नियम – यदि कोई वस्तु विरामावस्था(स्थिर अवस्था) में है तो वह तब तक विराम अवस्था में ही रहेगी जब तक उसपर कोई बाहरी बल न लगाया जायें, और गतिशील है तो तब तक एकसमान गति की अवस्था में रहेगी जब तक की उसपर बाहरी बल लगाकर उसे स्थिर न किया जाये।

Ans :- Whentemperatureand wind speed are constant, buthumidityincreases, therate ofevaporationwill decrease. When wind speed andhumiditystay constant, and temperatureincreases, then therateof evaporationwillincreasebecause warmer air can hold more water vapor than colder air.

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the answer is the 3/10'8m/s

n = speed of light in vaccum/speed of light in mediam

speed of light in water = 3×10^8/n=2.25×10^8

like mine and accept it best nd ur point will increse 100+ try it trust me

Newton's viscosity law'sstates that, the shear stress between adjacent fluid layers is proportional to the velocity gradients between the two layers. The ratio of shear stress to shear rate is a constant, for a given temperature and pressure, and isdefinedas theviscosityor coefficient ofviscosity.