Recently Active Physics Questions

A cubical block is to be constructed with iron sheets 1mm in thickness. What can be the minimum value of the external edge so that the cube doesnt sink in water? Density of iron=8000kg/m3 and density of water=1000kg/m3 I solv ...

*Image* 1.We know that the formula for time period for a simple pendulum is 2pi√(l/g).While deriving the formula we say that Theta is small so sin Theta is aproximately =theta.Thus the formula is valid for small oscillation ...

Can anyone solve HC Verma 30 in Heat and Temperature? ...

plz. explain this: when we talk of grazing incidence in case of a prism, like when light is almost parallel to one of the faces, then how does light come to kno when to go inside the prism???,as it almost paralel only in case ...

66. Let f : (–1, 1) → R be a differentiable function with f(0) = –1 and f′(0) = 1. Let g(x) = [f(2f(x) + 2)]2. Then g′(0) = (1) 4 (2) –4 (3) 0 (4) –2 ...

hii...PLS EXPLAIN LOOP METHOD AND STAR DELTA CONVERSION FOR SOLVING CAPACITOR PROBLEMS... I AM SOLVING BY GENERAL Q=CV METHOD..BUT IN A SOLUTION BOOK I SAW THE USE OF ABOVE METHODS AS SHORTCUTS....SO IF U KNW PLS EXPLAIN...// ...

1) At 0°C and 1atm pressure the densities of air, oxygen and nitrogen are 1.293, 1.429 and 1.251 kg/m3. Calculate the percentage of nitrogen in air, assuming these two gases to be present only. (it seems an easy one but stil ...

In Thermodynamics (physics) , work done by the system is taken positive but in Thermochemistry, work done by the system is negative (as per my book) Why are both the signs different? or is there any mistake in my book? ...

Two uniformly charged plane sheets S1 and S2 having charge densities ∂1 and ∂2 (∂1 > ∂2) are placed at a distance 'd' apart, parallel to each other. A charge q0 is moved along a line of length a (a < d) at cm an ...

A gas is contained in a metallic cylinder fitted with a piston. The piston is suddenly moved in to compress the gas and is maintained at this position. As the time passes the pressure of the gas in the cylinder- a)Increases b ...

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Any body knows how to derive the equation for radius of a bimetallic strip (on bending) ? ...

*Image* Q1 & Q2 floor is smooth.Q2 surface below top bloc is smooth. ...

Anyone can please tell what is it and where and how to use it? ...

we are able to squeeze snow and make balls out of it due to some property........ which property is that????????? A.anomalous behaviour of water B.large latent heat of ice C.large specific heat of water D.low melting point of ...

In an arbitrary scale of temperature, water freezes at 40 and boils at 290. What is the boiling point of a liquid in this scale if it boils at 62 degrees celcius. What formula is used here? ...

How is difference in ionisation energy related to valency of d metal? ...

For an ideal gas, if the molar heat capacity varies as C = Cv + 3aT2 Find the equation of the process in terms of temperature T and volume V, where a is a constant. ...

Why do diatomic gases have 2 rotational degrees of freedom? If we consider the z-axis to be along the line joining their centres, the moment of inertia about x and y axes is same so kinetic energy along these axes is same (i. ...

Two touching bars 1 and 2 are placed on an inclined plane forming an angle α with the horizontal. The masses of the bars are equal to m1 and m2, and the coefficients of friction between the inclined plane and these bars are ...

A wheel of radius R rolls without slipping with a speed v on a horiz road. When it is at a pt. A on the road , a small mud particle separates frm the wheel at its highest pt. and lands at pt. B on the road . Then (A) AB = v(R ...

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1) A rod of length l with thermally insulated lateral surface consists of material whose heat conductivity Coefficient varies with temperature as k=α/T, where a is a constant. The ends of the rod are kept at Temperatures T1 ...

is the topic INSTANTANEOUS AXIS OF ROTATION in JEE syllabus?? ...

since the part tests must be coming now..i guess the first part test must be having mechanics in it this question had come in my fiitjee aits (or might be some phase test) *Image* there is a smooth rod(friction is absent on i ...

Two wheels of same masses M and radii R are joined coaxially so that the system can perform rolling motion on the ground.The system is released from the top of the inclined plane of inclination theta and height H.The system p ...

A particle is confined to rotate in a circular path with decresing linear speed.Then,which of the following is correct? (A)L vector(angular momentum) is conserved about the centre (B)only direction of angular momentum is cons ...

Suppose a mass 'm' sticks to a rotating disc of mass M and radius R. I wanted to whether new I = (M+m)R2/2 or (MR2/2 + mR2) If second is correct then please give me an example in which first one is used. ...

1)actually this ques is a tatoo ques :P::D ....i just wanted to confirm my answer thts why possting draw fbd *Image* *Image* ...

An artificial satellite of mass m of a planet of mass M, revolves in a circular orbit whose radius is n times the radius R of the planet. In the process of motion, the satellite experiences a slight resistance due to cosmic d ...