Recently Active Physics Questions

A large stone of mass Me/2 is released when c.o.m of the stone is at a height h(<<Re) find the speed of stone when it is at a height h/2.Me, Re are mass and radius of earth ...

The angle of elevation of the sun, when the shadow of the pole is sqrt{3} times the height of the pole, is ...

A house subtends a right angle at the window of an opposite house and the angle of elevation of the window; from the bottom of the first house is 60o. If the distance between the two houses be 6 meters, then the height of the ...

A parallel beam of sodium light of wavelength 6000 Λ is incident on a thin glass plate of μ= 1.5 such that angle of incidence in the plate is 600.The smallest thickness of the plate which will make it appear dark by reflect ...

A collar of negligible size slides over the surface of horizontal circular rod for which coefficient of friction is 0.3.The collar is projected with a speed of 4 m/s and the radius of the ring is 10 cm.Find the distance moved ...

A thin lens of focal length f and its aperture diameter d, forms a real image of intensity I. Now the central part of the aperture upto diameter (d/2) is blocked by an opaque paper. The focal length and image intensity woul ...

When a lens of power P ( in air ) made of material of refractive index mu is immersed in liquid of refractive index {{mu }_{0}} . Then the power of lens is: ...

Before Einstein, it was known that a beam of light pushes against matter, this is known as radiation pressure. This means the light has momentum. *Image* Consider a cylinder of mass M.A pulse of light with energy E is emitted ...

Which of the following is not a unit of pressure? ...

In the following reaction, identify the products Na2CO3(aq) + 2HCl(aq) → _________________ ...

A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the centre. At a certain instant of time the stone is at its lowest position and has a speed u. The magnitude of the cha ...

Two particles A and B initially at rest move towards each other under a mutual force of attraction. The speed of centre of mass at the instant when the speed of A is v and the speed of B is 2v is : ...

Which one of the following IUPAC names is incorrect? ...

The IUPAC name of the compound *Image* ...

The correct IUPAC name of the compound *Image* ...

The distribution of speeds for helium atoms at different temperatures is given below: The relation between the temperatures is: ...

In the equilibrium CH3COOH + HF [C{{H}_{3}}COOH_{2}^{+}] + F– ...

The conjugate acid of HPO42– is ...

Arrange the groups [C{{H}_{3}}-,,C{{H}_{3}}C{{H}_{2}}-,,{{(C{{H}_{3}})}_{2}}CH-] and [{{(C{{H}_{3}})}_{3}}C-] in order of electron-releasing effect ...

Basic strength of [CHequiv overset{Theta }{mathop{C}},] (I), [C{{H}_{2}}=overset{Theta ,,,,}{mathop{CH}},] (II) and [C{{H}_{3}}overset{Theta ,,,,,,,}{mathop{C{{H}_{2}}}},] (III) will be in order ...

The correct order of increasing C - O bond length of, CO, CO32-, CO2 is ...

The hybridization of carbon in carbocations, carbon free radical, carbanions are respectively: ...

Strongest bond is formed by the head on overlapping of : ...

How many of the below given statements are correct: (i) Constant a is a measure of force of attraction between gas molecules and frac{{{n}^{2}}a}{{{V}^{2}}} is also called internal pressure. (ii) A is expressed in atm {{L} ...

Which of the following statements are correct for butadiene [overset{4,,,,,,,,}{mathop{C{{H}_{2}}}},=overset{3,,,,,}{mathop{CH}},-overset{2,,,,}{mathop{CH}},=overset{1,,,,,,,}{mathop{C{{H}_{2}}}},] ...

Equal mass of methane and oxygen are mixed in an empty container at {{25}^{0}}C . The fraction of the total pressure exerted by oxygen is ...

4 thin rods of length L and mass M are joined together to make a square. Find the moment of inertia of the system about any side. My approach:- I am finding the MI about the left side. The MI of the top and bottom rods(each) ...

A certain region of soap bubble reflects red light of wavelength 650nm in vaccum.What is the minmimum thickness that this region of the bubble could have? Take μ=1.41 ...

A container fitted with frictional massless piston consist of five values – I, II, III, IV and V. These valves open automatically if pressure exceed 1.5,2.2,2.5,4.4 and 4.8 atm respectively. Under the given initial conditio ...

You drop a stone into a deep well and hear the splash 2.5 s later. How deep is the well? (Ignore air resistance, and assume the velocity of sound is 340 m/s.) ...