Physics
The displacement of a particle in x direction is given by x.=9-5t+4t2 Find the Velocity at time t=0
PhysicsGeneral
- -8 ms-1
- 3 ms-1
- 10 ms-1
- -5 ms-1
Answer:The correct answer is: -5 ms-1
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A freely falling particle covers a building of 45 m height in one second. Find the height of the point from where the particle was released.[g=10 ms-2]
A freely falling particle covers a building of 45 m height in one second. Find the height of the point from where the particle was released.[g=10 ms-2]
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The distance travelled by a particle is given by S=3+2t +5t2The initial velocity of the particle is…..
The distance travelled by a particle is given by S=3+2t +5t2The initial velocity of the particle is…..
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For the arrangement shown in figure the time interval after which the water jet ceases to cross the wall (area of cross section of tank is A and orifice is ‘a’)

Velocity of efflux = 
Find ‘h’ to have range of ejected water

time taken by liquid to drain out from H to h is
Find ‘h’ to have range of ejected water
time taken by liquid to drain out from H to h is
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physics-General
Velocity of efflux = 
Find ‘h’ to have range of ejected water

time taken by liquid to drain out from H to h is
Find ‘h’ to have range of ejected water
time taken by liquid to drain out from H to h is
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Figure shows a stream of fluid emerging from a tube in the base of an open fixed tank. The expression of ‘y’ (Maximum height traveled by jet of water) is


Figure shows a stream of fluid emerging from a tube in the base of an open fixed tank. The expression of ‘y’ (Maximum height traveled by jet of water) is

physics-General

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A thin movable plate is separated from two fixed plates
and
by two highly viscous liquids of coefficients of viscosity
and
as shown, where
Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is ‘h’, then the distance ‘
’ of movable plate from upper plate such that movable plate can be moved with a finite velocity by applying the minimum possible force on movable plate is ( assume only linear velocity distribution in each liquid).

Viscous force due to upper liquid 
Viscous force due to lower liquid =
If total force is minimum

Viscous force due to lower liquid =
If total force is minimum
A thin movable plate is separated from two fixed plates
and
by two highly viscous liquids of coefficients of viscosity
and
as shown, where
Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is ‘h’, then the distance ‘
’ of movable plate from upper plate such that movable plate can be moved with a finite velocity by applying the minimum possible force on movable plate is ( assume only linear velocity distribution in each liquid).

physics-General
Viscous force due to upper liquid 
Viscous force due to lower liquid =
If total force is minimum

Viscous force due to lower liquid =
If total force is minimum
physics-
A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plate of mass M stationary at a height h = 15m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is (Assume the collision to be inelastic).

Force by liquid = Mg

But
and


But
A vertical jet of water coming out of a nozzle with velocity 20 m/s supports a plate of mass M stationary at a height h = 15m, as shown in the figure. If the rate of water flow is 1 litre per second, the mass of the plate is (Assume the collision to be inelastic).

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Force by liquid = Mg

But
and


But
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A conical flask of mass 10 kg and base area as 103 cm2 is floating in liquid of relative density 1.2, as shown in the figure. The force that liquid exerts on curved surface of conical flask will be (Given g = 10 m/s2)

= Buoyant force = weight
F = 20 N in down ward direction
A conical flask of mass 10 kg and base area as 103 cm2 is floating in liquid of relative density 1.2, as shown in the figure. The force that liquid exerts on curved surface of conical flask will be (Given g = 10 m/s2)

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= Buoyant force = weight
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A sphere of radius ‘R’ floats in a liquid of density ‘s’ such that its diameter x-x is below distance ‘h’ from free surface as shown. The density of sphere is r. The sphere is depressed slightly and released. The frequency of small oscillation is

and
A sphere of radius ‘R’ floats in a liquid of density ‘s’ such that its diameter x-x is below distance ‘h’ from free surface as shown. The density of sphere is r. The sphere is depressed slightly and released. The frequency of small oscillation is

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and
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The function 
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A particle is thrown in upward direction with Velocity V0 It passes through a point p of height h at time t1 and t2 so t1+t1
A particle is thrown in upward direction with Velocity V0 It passes through a point p of height h at time t1 and t2 so t1+t1
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Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are

) II and IV

Hence, magnetic induction in region I and IV will be zero.

Hence, magnetic induction in region I and IV will be zero.
Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are

physics-General
) II and IV

Hence, magnetic induction in region I and IV will be zero.

Hence, magnetic induction in region I and IV will be zero.
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defined by
. 
defined by
. 
maths-General