In a model, it is shown that an arch of abridge is semi-ellipti-Turito

General

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Maths-

In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is

Maths-General

$\frac{11}{4} m$
$\frac{8}{3} m$
$\frac{7}{2} m$
2 m

Answer:The correct answer is: $fraction numerator 8 over denominator 3 end fraction text end text m$

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Assertion :this equilibrium favours backward direction.
Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

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Two small particles of equal masses start moving in opposite directions from a point $A$ in a horizontal circular orbit. Their tangential velocities are $v$ and $2 v$ , respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A$ , these two particles will again reach the point $A$

Let initially particle

x

is moving in anticlockwise direction and

y

in clockwise direction
As the ratio of velocities of

x

and

y

particles are

fraction numerator v subscript x end subscript over denominator v subscript y end subscript end fraction equals fraction numerator 1 over denominator 2 end fraction

, therefore ratio of their distance covered will be in the ratio of

2 blank colon 1

. It means they collide at point B

After first collision at B, velocities of particles get interchanged,

i. e

x

will move with

2 v

and particle

y

with

v

Second collision will take place at point C. Again at this point velocities get interchanged and third collision take place at point A
So, after two collision these two particles will again reach the point A

Two small particles of equal masses start moving in opposite directions from a point $A$ in a horizontal circular orbit. Their tangential velocities are $v$ and $2 v$ , respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A$ , these two particles will again reach the point $A$

physics-General

Let initially particle

x

is moving in anticlockwise direction and

y

in clockwise direction
As the ratio of velocities of

x

and

y

particles are

fraction numerator v subscript x end subscript over denominator v subscript y end subscript end fraction equals fraction numerator 1 over denominator 2 end fraction

, therefore ratio of their distance covered will be in the ratio of

2 blank colon 1

. It means they collide at point B

After first collision at B, velocities of particles get interchanged,

i. e

x

will move with

2 v

and particle

y

with

v

General

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A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at $A$ is

fraction numerator 1 over denominator 2 end fraction m v to the power of 2 end exponent equals m g open parentheses 3 minus 1 close parentheses equals 2 m g

v equals square root of 4 g equals 2 square root of g

Vertical component at

A equals 2 square root of g sin invisible function application 30 degree equals square root of g

A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at $A$ is

physics-General

fraction numerator 1 over denominator 2 end fraction m v to the power of 2 end exponent equals m g open parentheses 3 minus 1 close parentheses equals 2 m g

v equals square root of 4 g equals 2 square root of g

Vertical component at

A equals 2 square root of g sin invisible function application 30 degree equals square root of g

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Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are $v blank a n d blank 2 v$ respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A blank$ ,these two particles will again reach The point $A ?$

A s first collision one particle having speed 2v will rotate

240 degree open parentheses o r fraction numerator 4 pi over denominator 3 end fraction close parentheses

while other particle having speed

v blank

will rotate

120 degree open parentheses o r fraction numerator 2 pi over denominator 3 end fraction close parentheses.

At first collision they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.

Two small particles of equal masses start moving in opposite directions from a point A in a horizontal circular orbit. Their tangential velocities are $v blank a n d blank 2 v$ respectively, as shown in the figure. Between collisions, the particles move with constant speeds. After making how many elastic collisions, other than that at $A blank$ ,these two particles will again reach The point $A ?$

physics-General

A s first collision one particle having speed 2v will rotate

240 degree open parentheses o r fraction numerator 4 pi over denominator 3 end fraction close parentheses

while other particle having speed

v blank

will rotate

120 degree open parentheses o r fraction numerator 2 pi over denominator 3 end fraction close parentheses.

At first collision they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.

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The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position $A$ are $open parentheses 0 , 2 close parentheses.$ The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are

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The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line $O A$ will

When the length of spring is halved, its spring constant will becomes double

open square brackets B e c a u s e blank k proportional to fraction numerator 1 over denominator x end fraction proportional to fraction numerator 1 over denominator L end fraction therefore k proportional to fraction numerator 1 over denominator L end fraction close square brackets

Slope of force displacement graph gives the spring constant

left parenthesis k right parenthesis

of spring
If

k

becomes double then slope of the graph increases

i. e.

graph shifts towards force- axis

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line $O A$ will

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When the length of spring is halved, its spring constant will becomes double

open square brackets B e c a u s e blank k proportional to fraction numerator 1 over denominator x end fraction proportional to fraction numerator 1 over denominator L end fraction therefore k proportional to fraction numerator 1 over denominator L end fraction close square brackets

Slope of force displacement graph gives the spring constant

left parenthesis k right parenthesis

of spring
If

k

becomes double then slope of the graph increases

i. e.

graph shifts towards force- axis

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An intense stream of water of cross-sectional area $A$ strikes a wall at an angle $theta$ with the normal to the wall and returns back elastically. If the density of water is $rho$ and its velocity is $v$ ,then the force exerted in the wall will be

Linear momentum of water striking per second to the wall

P subscript 1 end subscript equals m v equals A v rho blank v equals A v to the power of 2 end exponent blank rho

P subscript r end subscript equals A v to the power of 2 end exponent rho

Now making components of momentum along

x

- axes and

y

-axes. Change in momentum of water per second

equals P subscript i end subscript cos invisible function application theta plus P subscript r end subscript cos invisible function application theta

equals 2 A v to the power of 2 end exponent blank rho cos invisible function application theta

By definition of force, force exerted on the Wall

equals 2 A v to the power of 2 end exponent blank rho cos invisible function application theta

An intense stream of water of cross-sectional area $A$ strikes a wall at an angle $theta$ with the normal to the wall and returns back elastically. If the density of water is $rho$ and its velocity is $v$ ,then the force exerted in the wall will be

physics-General

Linear momentum of water striking per second to the wall

P subscript 1 end subscript equals m v equals A v rho blank v equals A v to the power of 2 end exponent blank rho

P subscript r end subscript equals A v to the power of 2 end exponent rho

Now making components of momentum along

x

- axes and

y

-axes. Change in momentum of water per second

equals P subscript i end subscript cos invisible function application theta plus P subscript r end subscript cos invisible function application theta

equals 2 A v to the power of 2 end exponent blank rho cos invisible function application theta

By definition of force, force exerted on the Wall

equals 2 A v to the power of 2 end exponent blank rho cos invisible function application theta

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If the locus of the mid points of the chords of the ellipse $fraction numerator x to the power of 2 end exponent over denominator a to the power of 2 end exponent end fraction plus fraction numerator y to the power of 2 end exponent over denominator b to the power of 2 end exponent end fraction equals 1$ , drawn parallel to $y equals m subscript 1 end subscript x$ is $y equals m subscript 2 end subscript x$ then $m subscript 1 end subscript m subscript 2 end subscript equals$

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Can’t find what you’re looking for?

In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is

$\frac{11}{4} m$
$\frac{8}{3} m$
$\frac{7}{2} m$
2 m

Answer:The correct answer is: $fraction numerator 8 over denominator 3 end fraction text end text m$

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Assertion :this equilibrium favours backward direction.
Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

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Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

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In a model, it is shown that an arch of abridge is semi-elliptical with major axis horizontal. If the length of the base is 9 m and the highest part of the bridge is 3 m from the horizontal, the best approximation of the height of the arch, 2 m from the centre of the base is

2 m

Answer:The correct answer is:

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The number of non-negative integral solutions of x + y + z  n, where n  N is -

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The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position are The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are

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The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line will

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An intense stream of water of cross-sectional area strikes a wall at an angle with the normal to the wall and returns back elastically. If the density of water is and its velocity is ,then the force exerted in the wall will be

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$\frac{11}{4} m$
$\frac{8}{3} m$
$\frac{7}{2} m$
2 m

Answer:The correct answer is: $fraction numerator 8 over denominator 3 end fraction text end text m$

The number of numbers between 1 and 10¹⁰ which contain the digit 1 is -

The number of numbers between 1 and 10¹⁰ which contain the digit 1 is -

Assertion :this equilibrium favours backward direction.
Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

Assertion :this equilibrium favours backward direction.
Reason :is stronger base than $C H subscript 2 end subscript C O O to the power of minus end exponent$

A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at $A$ is

A 0.098 kg block slides down a frictionless track as shown. The vertical component of the velocity of block at $A$ is

The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position $A$ are $open parentheses 0 , 2 close parentheses.$ The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are

The trajectory of a particle moving in vast maidan is as shown in the figure. The coordinates of a position $A$ are $open parentheses 0 , 2 close parentheses.$ The coordinates of another point at which the instantaneous velocity is same as the average velocity between the points are

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line $O A$ will

The force required to stretch a spring varies with the distance as shown in the figure. If the experiment is performed with above spring of half length, the line $O A$ will

An intense stream of water of cross-sectional area $A$ strikes a wall at an angle $theta$ with the normal to the wall and returns back elastically. If the density of water is $rho$ and its velocity is $v$ ,then the force exerted in the wall will be

An intense stream of water of cross-sectional area $A$ strikes a wall at an angle $theta$ with the normal to the wall and returns back elastically. If the density of water is $rho$ and its velocity is $v$ ,then the force exerted in the wall will be

If ⁿC_r denotes the number of combinations of n things taken r at a time, then the expression ⁿC_r+1 + ⁿC_{r –1} + 2 × ⁿC_r equals-

If ⁿC_r denotes the number of combinations of n things taken r at a time, then the expression ⁿC_r+1 + ⁿC_{r –1} + 2 × ⁿC_r equals-