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A closed compartment containing a liquid is moving with some acceleration in the horizontal direction. Neglecting effect of gravity, the pressure is compartment is:

An object is initially at a distance of $200\text{cm}$ from a plane mirror. If the mirror approaches the object at a speed of $15\text{cm/s}$, then after $8\text{sec}$ the distance between object and its image will be

A block with a mass of $1\text{kg}$ is connected to a massless spring with a force constant of $100\text{N/m}$ and is placed on a smooth horizontal surface. At $t=0$, a constant force of $F=10\text{N}$ is applied on the block, when the spring is in its natural length. The speed of the block, when it is displaced by $8\text{cm}$ from its mean position will be

In the figure shown, find the tension $‘T^{\prime }$ in the string to prevent the body from sliding down the plane. Assume the string to be horizontal.

A wire suspended vertically from one of its ends is stretched by attaching a weight of $200\text{N}$ to the lower end. The weight stretches the wire by $1\text{mm}$. Then, the elastic energy stored in the wire is-

A block of mass $5\text{kg}$ is on a rough horizontal surface at rest. Now a force($F$) of $24\text{N}$ is imparted to it with negligible impulse. If the coefficient of kinetic friction is $0.4$ and $g=9.8{\text{m/s}}^2$, then the acceleration of the block is

A point $P$ having the coordinate in space $(4,2,3)$. Find the position vector of $P$ ?

A small mass $m$ starts sliding down a smooth and stationary semi circular track. Which of the following graph best represents the variation of magnitude of the force applied by the track on the mass and the angle $\theta$ ( assume initially $\theta =0$?

Two blocks of masses 3 kg and 6 kg rest on a horizontal smooth surface. The 3 kg block is attached to a spring with a force constant $k=900N{m}^{-1}$ which is compressed 2m from beyond the equilibrium position. The 6 kg mass is at rest at 1m from mean position. 3kg mass strikes the 6kg mass and the two stick together.

Two particles are projected from the ground simultaneously with speeds $20m/s$ and $\frac{20}{\sqrt{3}}m/s$at angles ${30}^{\circ }$ and ${60}^{\circ }$ with the horizontal in the same direction. The maximum distance between them till both of them strike the ground is approximately ($g$ = $10m/s^2$)

Two sound sources are moving in opposite directions with velocities v₁ and v₂ (v₁ > v₂). Both are moving away from a stationary observer along same line. The frequency of both the sources is 900 Hz. What is the value of v₁ - v₂ so that the beat frequency observed by the observer is 6 Hz. Speed of sound is v = 300 m/s. Given that v₁ and v₂ << v

What is the role of a moderator in a nuclear reactor?

In explaining the electric flux topic, there was an example about the fishing net catching fishes and it was told that the net catches more fishes when it's perpendicular to the flow of water and that the number of fishes being catched is reduced when the net is at an angle (say 60 degree) .
and my question is " Won't the number of fishes being caught be the same in both the cases because the area remains the same ? why and why not ? "

For a projectile ( range)² is 48 times of (maximum height)² obtained. The angle of projection is:

a) 60°

b) 30°

c) 45°

d) 75°

A very broad elevator is going up vertically with a constant acceleration of $2m/s^2$. At the instant when its velocity is $4m/s$ a ball is projected from the floor of the lift with a speed of $4m/s$ relative to the floor at an elevation of ${30}^{\circ }$. The time taken by the ball to return the floor is ($g$ = $10m/s^2$) from time of projection.

A block of masses $\underrightarrow{m}$sliding on a smooth horizontal surface with a velocity v meets a long horizontal spring fixed at one end and having spring constant k as shown in figure (8-E 10).Find the maximum compression of tl spring. Will the velocity of the block be the same as $\overrightarrow{v}$ when it comes back to the original position shown ?

When image is formed at infinity, what does it mean??

What we'll see?

A person with a mass of $M\text{kg}$ stands in contact against the wall of a cylindrical drum of radius $r$ rotating with an angular velocity $\omega$. If the coefficient of friction between the wall and the clothing is $\mu$, the minimum rotational speed of the cylinder which enables the person to remain stuck to the wall when the floor is suddenly removed, is

An observer move towards a stationary source of sound with a velocity equal to one fifth of the velocity of sound. The apparent change in frequency is

A plane surface is inclined making an angle $\theta$ with the horizontal. From the bottom of this inclined plane, a bullet is fired with velocity $v$. The maximum possible range of the bullet on the inclined plane is

1 ohm is equal to

A cone falling with a speed V0strikes and penetrates the block of a packaging material. The acceleration of cone after impact is a=g-cx^{2. Where c is a positive constant and x is the penetration distance . If maximum penetration depth is x metre then find c.}

A closed organ pipe of length $l$ is vibrating in $3^{rd}$ overtone with amplitude of antinode being ${}^{\prime }{a}^{\prime }$. Amplitude at a distance $\frac{l}{7}$ from the closed end is

If ${\lambda }_1$ and ${\lambda }_2$ are respectively the wavelengths of the series limit of Lyman and Balmer series of Hydrogen atom, then the wavelength of the first line of the Lyman series of the H-atom is:

A $800\text{kg}$ car takes a circular turn of radius $25\text{m}$ with an uniform speed of $36\text{km/h}$. The centripetal force acting upon the car is

The system shown in the figure is released from rest with the mass $2\text{kg}$ in contact with the ground. The pulley and spring are massless, and friction is absent everywhere. Then, find the speed of the $5\text{kg}$ block when the $2\text{kg}$ block leaves contact with the ground (force constant of the spring $k=40{\text{Nm}}^{-1}$ and $g=10{\text{ms}}^{-2}$)

In the situation shown in the figure, block of mass $m$ is pulled so that the spring is elongated without the block slipping. Which of the following graphs correctly represents the relation between static frictional force and elongation for angle of inclination ${37}^{\circ }$ and ${53}^{\circ }$. The spring constant is $k$ and the coefficient of friction is ${\mu }_s=0.8$.

A block is fastened at one end of a wire and is rotated in a vertical circle of radius $R$. Determine the ratio of change in length of the wire at the lowest point to that at the highest point of the circle. Assume that speed of the block at highest and lowest points is the same ($v$).

A ball is thrown vertically upward and its motion is studied before it falls on the ground. Which of the following represents velocity time graph of the ball during its flight (air resistance is neglected)

The frequency of vibration $f$ of a mass $m$ suspended from a spring of spring constant $K$ is given by a relation of this type $f=C{m}^x{K}^y$; where $C$ is a dimensionless quantity. The value of $x$ and $y$ are

A proton enters a magnetic field with a velocity of 1.5 x 10⁵ m/s making an angle of 30^o with the field. What is the force experienced by the proton if B = 3.0 T.

Acceleration of the particle in a rectilinear motion is given as $a=4t+3$ in $\left(m/s^2\right)$. The velocity and displacement as a function of time $t$ respectively are
(Given that at $t=0,u=3m/s,x=0m$)

Find the accelerations of the three blocks shown in the figure, if a horizontal force of $10\text{N}$ is applied on $2\text{kg}$ block.
(Take $g=10m/s^2$)

Two partial AandB having a charge q and 2q respectively are placed on a smooth table with a separation d. A third partial CIs to be clamped on the table in such a way that the partial A and B remain at rest on a table under electrical forces. What should be the charge on And where it should be clamped

The energy required to split ${}_8{O}^{16}$ nucleus into four $\alpha$-particles is (Consider the mass of $\alpha$ particle is $4.002603U$ and that of oxygen is $15.994915U$)

The height above the Earth's surface at which the value of acceleration due to gravity reduces to half its value on the Earth's surface is h. Assume the Earth to be a sphere of radius 6400 Km. Find h.

What gauss's law actually stands for and why it is used in physics?

Farida can review any of the following except

A man stands on a rotating platform, with his arms stretched horizontally holding a 5 kg weight in each hand. The angular speed of the platform is 30 revolutions per minute.
The man then brings his arms close to his body with the distance of each weight from the axis changing from 90cm to 20cm. The moment of inertia of the man together with the platform may be taken to be constant and equal to $7.6kg{m}^2$.

What is his new angular speed? (Neglect friction.)
Is kinetic energy conserved in the process? If not, from where does the change come about?

Mercury has an angle of contact equal to ${140}^{\circ }$ with soda lime glass. A narrow tube of radius 1.00 mm made of this glass is dipped in a trough containing mercury. By what amount does the mercury dip down in the tube relative to the liquid surface outside? Surface tension of mercury at the temperature of the experiment is 0.465 N$m^{-1}$. Density of mercury = $13.6\times {10}^{3}kg{m}^{–3}$.

Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill upto a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?

A man wants to reach point $B$ on the opposite bank of a river flowing at a speed as shown in figure. What minimum speed relative to water should the man have so that he can reach point $B$?