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The ratio of maximum velocity and maximum acceleration of a particle of SHM having amplitude A and angular frequency omega………..

Under the action of force, 2kg body moves such that its position x as a function of time t is given by x= (t^(3))/(30x is in metre and t in second. Calculate the work done by the force in the first 2 second

Assertion : Electrons do not experience strong nuclear force. Reason : Strong nuclear force is charge-independent force.

A wooden block with a coin placed on its, top floats in water with 1 as the length immersed and h as the height of water column. After some time the coin falls into water. Then

A gaseousmixtureconsistsof16gofheliumand16gofoxygenthe ratioof twospecificheatsof themixtureis

Weighing the Earth : You are given the following data: g = 9.81 ms^(-2), R_(E) = 6.37 ×x 10^(6) m, the distance to the moon R =3.84 ×x 10^(8) m and the time period of the moon’s revolution is 27.3 days. Obtain the mass of the Earth M_(E) in two different ways.

Calculate the external work done by the system in Kcal, when 40kCal of heat is supplied to the system, 8400 J of internal work is done.

For a gas, the difference between the two specific heats is 41503 Kg^(-1) K^(-1)and the ratio of specificheats is 1.4. What is the specific heat of the gas at constant volume in J Kg^(-1) K^(-1)?

A stone tied to a rope is rotated in a vertical circle with uniform speed. If the difference between the maximum and minimum tensions in the rope is 20 N, mass of the stone in kg is (take, g= 10 ms^(-2))

A physical quantity Q is related to measurable quantities L,M and N as Q = KL^(-2)M^2N^3 , where k is constant. If the % errors in the measurements of L,M and N are respectively 1%, 2% and 1%, then the % error in the measurement of Q is

Heat is supplied to a diatomic gas at constant pressure. The ratio of Delta Q : Delta U : Delta W is

If the shear modulusand bulk modulusof a materialare 0.42 xx 10^(11) Nm^(-2) and 0.56 xx 10^(11) Nm^(-2)respectivelythen young.s modulusof that material is -----

A black body initially at 27^(@)C is heated to 327^(@)C.How many times is the total radiation emitted at the higher temperature than that emitted at the lower temperature ? What is the wavelength of the maximum energy radiation at the higher temperature ? Wien's constant = 2.898xx10^(-3) mK.

If the potential energy of the particle is alpha-(beta)/(2)x^(2), then force experienced by the particle is:

A body projected vertically with a velocity 'u' from the ground. Its velocity a) At half of maximum height u//2 b) At 3//4^(th) of maximum height (u)/(sqrt(2)) c) At 1//3^(rd) of maximum height sqrt((2)/(3))u d) At 1//4^(th) of maximum height (sqrt(3))/(2)u

A: A man is sitting in a boat which is floating on a pond. If the man drinks some water from the pond, the level of the water in the pond decreases. R: According to Archimede.s principle the weight displaced by body is equal to the weight of the body.

What is meant by dimensional formula ?

Explain why a fluid flowing out of a small hole in a vessel results in a backward thrust on the vessel.

Certain amount of heat supplied to an ideal gas under isothermal conditions will result in

Which fundamental law forms the basis of equation of continuity ?

Define the different types of potential energy.

If the momentum of a body is increased by 25%,its kinetic energy is increased by

A simple pendulum is set into vibrations. The bob of the pendulum comes to rest after some time due to

A glass sphere of radius 20cm has a small air bubble 4cm below its centre. The sphere is viewed from outside and along a vertical line through the bubble. The apparent depth of the bubble below the surface of sphere is

A lorry and a car moving with same momentum are brought to rest by applying the same retarding force. Then

If two bodies stick together after collision and move as a single body, the collision is said to be

In SHM , kinetic energy is ………. .

The radius of a planet is R_1 and a satellite revolve round of in a circle of radius R_2. The time period of revolution is T. The acceleration due to the gravitation of the planet at its surface.

A simple pendulum has time period T_(1). The point of suspension is now moved upwards according to the relation y=Kt^(2),(K=1m*s^(-2)) where y is the vertical displacement. The time period now becomes T_(2). The ratio of T_(1)^(2)//T_(2)^(2) is (g=10m*s^(-2))

On which two physical quantities escape velocity of body thrown on the earth does not depend?

Which one of the following motions on a smooth planesurface does not involve force

. A bullet hits a block at rest on a frictionless horizontal surface and gets embedded into it. The physical quantity associated with the block that remains unchanged is

The acceleration of a moving body can be found from :

A block of mass m is placed on a circular track and then it is given a velocity upsilon vertically downwards at position A on track. If block moves on track with constant speed, then

In a cyclic process shown in the figure on ideal gas is adiabatically taken from B to A, the work done on the gas during the process B rarr A is 30J, when the gas is taken from A rarr Bthe heat absorbed by the gas is 20J. What is the change in internal ebergy of the gas in the process A rarr B.

Two resistors of 10KOmega and 20KOmegaare conne cted in series. If tolerance of each resistor is 10% then tolerance of the combination will be

“The most incomprehensible thing about the world, is that it is comprehensible. ” Explain.

A point moves rectilinearly with deceleration which depends on the velocity v of the particle as a = k sqrt(v) where k = + ve constant. At the initial moment the velocity of the point is equal to v_(0). What distance will it cover before its stops.

Moment of inertia of a thin uniform ring about an axis passing through the center of gravity and perpendicular to the plane is

What is an impure spectrum ?

If the gravitational force between two objects were proportional to 1/R (and not as 1//R^2) where R is separation between them, then a particle in circular orbit under such a force would have its orbital speed v proportional to,

When a block of mass M is suspended by a long wire of length L, the length of the wire becomes (L +l). The elastic potential energy stored in the extended wire is:

A uniform bar of length 6a & mass 8m lies on a smooth horizontal table. Two point masses 'm & 2m' moving in the same horizontal plane with speeds 2v & 'v' respectively strike the bar as shown & stick to the bar after collision then

Calculate the rms velocity of oxygen molecules at S.T.P The molecular weight of oxygen is 32.

State Hooke's law and verify it with the help of an experiment.

A stone is projected from the top of a tower with velocity 20ms^(-1) making an angle 30^(@) with the horizontal. If the total time of flight is 5s and g=10ms^(-2).

Lubrication reduces friction because

Which of the following physicalquantity should be measured more accurately in the expression X=(h^(2)y^(3)z)/(b) for most accurate results?

A simple pendulum has time period T_(1). The point of suspension is now moved upwards according to the relation y=Kt^(2),(K=1ms^(-2)) where y is the vertical displacement. The time period now becomes T_(2). The ratio of T_(1)^(2)//T_(2)^(2) is (g=10ms^(-2))