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Recent questions tagged physics
Questions
A vertical cylinderical tank 1cm high has its top end closed by a tightly fitted frictionless piston of negligible weight.The air inside the cylinder is at an absolute pressure of 1atm.The piston is depressed by pouring mercury on it very slowly.How far will the piston before mercury spills on the top of cylinder?
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
kinetic-theory-of-an-ideal-gas
pressure-of-an-ideal-gas
asked
May 12, 2014
by
sreemathi.v
1
answer
A vessel A with a capacity $V_1=2lt$ contains gas at a pressure $P_1=2atm$ and a vessel B with a capacity of $V_2=4lt$ contains the same gas at a pressure of 1atm.The temperature is $0^{\large\circ}C$ in A & $27^{\large\circ}C$ in B.What will be the pressure in the vessels if they are connected by a tube?
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
difficult
asked
May 12, 2014
by
sreemathi.v
1
answer
A cubical box of side 1cm contains helium gas (atomic weight =4) at a pressure of $100N/s^2$.During an abservation time of 1sec,an atom travelling with a root mean square speed parallel to one of the edges of the cube was found to make 500 hits with the wall.Evaluate the temperature of the gas
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
Calculate the $V_{RMS}$ of organ atoms at room temperature $25^{\large\circ}$
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
At temperature T,N molecules of a gas A,each having mass m and at the same temperature,2N molecules of gas B each having mass 2m are filled in a container .$V_{RMS}$ of molecules of B is $V^2$ and $x$ component of $V_{RMS}$ of A is $\omega^2$.$\large\frac{\omega^2}{V^2}$ is
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
28gm of $N_2$ gas is contained in a flask at a pressure 10atm and at a temperature of $57^{\large\circ}$C.It is found that due to leakage in the flask,the pressure is reduced to half & temperature is reduced to $27^{\large\circ}$C.Quantity of $N_2$ leaked out
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
Which of the following curve represent ideal gas behaviour
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
Calculate the total degrees of freedom of /cc of hydrogen
jeemain
physics
kinetic-theory-of-gases
degrees-of-freedom
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
A balloon has 5.0g mole of helium at $7^{\large\circ}C$.Calculate the total internal energy of the system
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
A vessel containing 1gm of oxygen at a pressure of 10atm a temperature of $47^{\large\circ}C$.It is found that because of a leak,the pressure drops to $\large\frac{5}{8}$th of its original value & temperature falls to 2x.Find the mass of oxygen that has leaked out.
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
What is the energy of the rotational motion of molecules contained in 1Kg of nitrogen at a temperature of $7^{\large\circ}C$
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
RMS speed of a monoatomic gas is increased by 2 times.If the process is done adiabatically then the ratio of initial volumes to final volume will be
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
N molecules of an ideal gas at temperature $T_1$ & pressure $P_1$ are contained in a closed box.If the molecules in the box get doubled,keeping total K.E same then if new pressure is $P_2$ & temperature is $T_2$ then
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
easy
asked
May 12, 2014
by
sreemathi.v
1
answer
RMS velocity of $H_2$ at 300K is $1930m/s$.Rms velocity of $O_2$ at 1200K will be
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
easy
asked
May 12, 2014
by
sreemathi.v
1
answer
The distance between gas molecules is doubled on constant temperature,then the pressure is
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
easy
asked
May 12, 2014
by
sreemathi.v
1
answer
At constant pressure,hydrogen is having temperature of $327^{\large\circ}C$.Till what temperature is it to be cooled such that the rms velocity of its molecules becomes half of the earlier values
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
easy
asked
May 12, 2014
by
sreemathi.v
1
answer
An oxygen storage tank has a capacity of $0.05m^3$.The gas pressure is 100atm.Determine the total K.E of gas.
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
easy
asked
May 12, 2014
by
sreemathi.v
1
answer
If pressure and temperature of an ideal gas is doubled and volume is halved the number of molecules of gas:-
jeemain
physics
kinetic-theory-of-gases
cbse
class11
ch13
easy
asked
May 12, 2014
by
sreemathi.v
1
answer
A water tank is constructed on the top of a building with what speed will the water come out of a tank 8m below the water level the tank?Assume steady flow and that the pressure above the water level is equal to $P_{atm}$.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 12, 2014
by
sreemathi.v
1
answer
The profile of a dam is an arc of a circle,the arc having a radius of 30m and subtending an angle of $60^{\large\circ}$ at the centre of curvature which lies in the water surfaces.Determine the load on the dam in N/m
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 12, 2014
by
sreemathi.v
1
answer
A tank with vertical sides is square in plane with 3m long sides.The tank contains oil of relative density 0.9 to a depth of 2.0m which is floating on water a depth of 1.5m.Calculate the force on the walls.(Consider one wall of the tank).
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 12, 2014
by
sreemathi.v
1
answer
A closed tank has an orifice $0.025m$ diameter in one of its vertical sides.The tank contains oil to a depth of 0.61m above the centre of the orifice and the pressure in the air space above oil is maintained at $13780N/m^2$ above atmospheric.What is the discharge from the orifile.(Coefficient of discharge of the orifice is 0.61 relative density of oil is 0.9)
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 12, 2014
by
sreemathi.v
1
answer
The face of a dam is vertical to a depth of 17m below the water surface from slopes at $60^{\large\circ}$ to the vertical.If the depth of water is 7.5m.What is the $F_{resultant}$ on the whole face?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
What height would a water barometer need to be to measure atmospheric pressure?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
At what depth below the surface of oil,relative density 0.8,will produce a pressure of $120KN/m^2$?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
What will the absolute pressure of water at depth 12m below the surface?$(\rho_{water}=1000Kg/m^3,P_{atm}=101KN/m^2)$
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
Water flows in a horizontal tube as shown in figure.The pressure of water changes by $600N/m^2$ between A and B where the areas of cross section are $30cm^2$ and $15cm^2$ respectively.Find the rate of flow of water through the tube
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
A metal piece of mass 160g lies in equlibrium inside a glass of $H_2O$.The piece touches the bottom of the glass at a small number of points.If the density of the metal is $8000Kg/m^3$.Find the normal force exerted by the bottom of the glass on the metal piece
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
The area of cross section of the wider tube shown in figure is $900cm^2$.If the boy standing on the piston weights 45Kg then difference in the levels of water in the two tubes are ($\rho_{water}=1000Kg/m^3)$
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
In a test experiment on a model aeroplane in a wind tunnel,the flow speeds on the upper and lower surfaces of the wing are $70ms^{-1}$ respectively.What is the lift on the wing if its area is $2.5m^2$?Take the density of air to be $1.3Kgm^{-3}$
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
A U-tube contains water and methylated spirit separated by mercury.The mercury columns in the two arms are in level with 10cm of water in one arm & 12.5cm of spirit in the other.What is specific gravity of spirit ?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
In Milikan's oil drop experiment,what is the terminal speed of an uncharged drop of radius $2\times 10^{-5}m$ and density $1.2\times 10^3Kgm^{-3}$?Take the viscocity of air at the temperature of the experiment is $1.8\times 10^{-5}pas$.How much is the viscous force on the drop at the speed?Neglect byoyancy of the drop due to air.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
What is the pressure inside the drop of mercury of radius 3mm at room temperature?S.T of mercury at that temperature $(20^{\large\circ}C)$ is $4.65\times 10^{-1}Nm^{-1}$.The $P_{atm}=1.01\times 10^4pa$.Also give excess pressure inside the drop
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
U-shaped wire is dipped in a soap solution,and removed.The thin film formed between the wire and the light slider,supports a weight of $1.5\times 10^{-2}N$(which includes the small weight of the slider).The length of slider is 30cm.What is the surface tension of the film?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
From the figure below,(A) & (B) refer to the study of flow of a (non-viscous) liquid.Which of the two figures is incorrect?($P_1$ & $P_2$ represents pipe)
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
There is a small hole near the botttom of an open tank filled with a liquid.The speed of water ejected does not depend on
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 9, 2014
by
sreemathi.v
1
answer
The three vessels shown in figure below have same base area.Equal volume of a liquid are passed in the three vessels.The force on the base will be
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
Equal mass of three liquids are kept in three identical cylindrical vessel A,B and C.The densities are $\rho_A,\rho_B,\rho_C$ with $f_A < f_B < f_C$.The force on the base will be
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
A wooden object floats in $H_2O$ kept in beaker.The object is near a side of the beaker (given in diagram).Let $P_1,P_2,P_3$ be the pressures at the three points $A,B$ and $C$ of the bottom as shown in figure.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
Water is flowing through a long horizontal tube.Let $P_A$ & $P_B$ be the pressures at two horizontal points A and B of the tube.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
Bernoulli’s theorem is based on conservation of which of the following:
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
The only possible dimensionless group that combines velocity $V_1$ body size $L$,fluid density $\rho$ and surface tension coefficient $\sigma$ is
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
The absolute viscocity $\mu$ of a fluid is primarily a function of
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 9, 2014
by
sreemathi.v
1
answer
A rod of mass M of radius r,length l made up of material of young modulus Y is rotating in horizontal plane with angular velocity $\omega$.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
A rod of radius 2mm,length 80cm density $5KKg/m^3$ and made up of material of $Y=1\times 10^{10}N/m^2$.Find the elongation due to its own weight.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
The length of a wire is 8cm when tension in it is 80N and is 15cm when tension in it 200N.The natural length of the wire is
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 9, 2014
by
sreemathi.v
1
answer
Two wires of radii in the ratio 2 : 3,lengths in the ratio 3 : 5.Forces applied in the ratio 5 : 7 with young modulii in the ratio 3 : 4.The change in length is in the ratio
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 8, 2014
by
sreemathi.v
1
answer
A wire can sustain the weight of 5kg.If we cut the wire in 3 parts then together 3 parts can sustain the weight
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 8, 2014
by
sreemathi.v
1
answer
The ratio of maximum tension in two string of same material having radii in the ratio 3 : 5
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 8, 2014
by
sreemathi.v
1
answer
When the load is hang from a string then the ratio of work done by gravity to the work done spring force is
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 8, 2014
by
sreemathi.v
1
answer
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