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Akansha asked a question
Subject: Physics, asked on on 18/11/16
Q.Two vessels contain two ideal gases A and B at the same temperature, the pressure of A be twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weights of A and B is Q.Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weights of A and B is
Rashmika B asked a question
Subject: Physics, asked on on 6/6/17
A monatomic gas undergoes a cycle consisting of two isothermal and two isobars.If the minimum and maximum temperature of the gas during the cycle are T 1 = 400 K and T 2 =800K, respectively, and the ratio of maximum to minimum volume is 4, calculate the efficiency of the cycle.
Almas asked a question
Subject: Physics, asked on on 14/3/17
One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of gas will be
(1) (T + 2.4) K
(2) (T – 2.4) K
(3) (T + 4) K
(4) (T – 4) K



 
Ishan asked a question
Subject: Physics, asked on on 14/11/18
the compression ratio of a certain diesel engine is 15 . this means that air in the cylinder is conpresssed to 1/15 th of initial volume . if the initial pressure is is 10^5 pascals and initial temperature is 300 k, find the final temperature and pressure . hint ( in adiabatic process the ideal gas equation become like this pv^gamma = K(constant) and here gamma = 1.4 in this question)
Rashmika B asked a question
Subject: Physics, asked on on 6/6/17
one mole of a gas with gamma=5/3 is initially at temperature 27 C and occupy volume V.The gas is first expanded at constant pressure until its volume double.Then it undergoes an adiabatic change until the temperature returns to its initial value.Find the work done
Divyansh Bansal asked a question
Subject: Physics, asked on on 27/4/18
Solve this.
Q. The volume of a diatomic gas is reduced to 132 times of its initial volume in an adiabatic process. If initial temperature of the gas is 227°C, then its final temperature is
(1) 2000°C
(2) 1727°C
(3) 1000°C
(4) 727°C
Divyansh Bansal asked a question
Subject: Physics, asked on on 27/4/18
Solve this.
Q. Two moles of oxygen gas undergoes a process given by P = 41+V22 where P is pressure (Pa) and V is volume (m3). Find out the rms speed of gas molecule, when volume of gas becomes 4 m3.
(1) 56 m/s
(2) 412 m/s
(3) 12 m/s
(4) 11.5 m/s
Ishan asked a question
Subject: Physics, asked on on 14/11/18
calculate the fall in temperature of helium initially at 15 degree celsius , when it is suddenly expanded to 8 times its volume ( gamma = 5/3 in adiabatic process the ideal gas equation looks like this pv^gamma=K (constant) this gamma is that that gamma whose value is given )
Medha asked a question
Subject: Physics, asked on on 18/1/17
​a hail falls from a great height. if half of the mechanical energy is converted into heat, from what height it should fall so that it melts completely -
a)700m
b)7m
c)70km
d)700km
Divyansh Bansal asked a question
Subject: Physics, asked on on 27/4/18
Solve this.
select incorrect statement about the molar 
specific heat of a gaseous system 
(1) Specific heat in an adiabatic process, Ca = 0 
(2) Specific heat in an isothermal process, Ci =∞ 
(3) Specific heat in an isobaric process, Cp = γRγ-1
(4) Specific heat in an isochoric process, Cv = Rγ
 
Syed Ayaan asked a question
Subject: Physics, asked on on 21/9/16
In inelastic collision kinetic energy changes , so the velocities of the object also change . So Howz Momentum conserved in an inelastic collision?
Divyansh Bansal asked a question
Subject: Physics, asked on on 27/4/18
Solve this.
Q. In an isothermal process 30 joule of work is performed by gas, the amount of heat supplied to the gas is
(1) 30 J
(2) - 30 J
(3) 15 J
(4) 60 J
Harthik asked a question
Subject: Physics, asked on on 30/4/17
plz help
Chirag Mudgil asked a question
Subject: Physics, asked on on 14/2/18

what is an organ pipe ? describe the various mode of vibration in an open organ pipe .

and what type of question ask by cbse examiner on this topic
Rashmika B asked a question
Subject: Physics, asked on on 11/6/17
Two slabs of thicknesses d,2d;and thermal conductivities k and 2k,are joined face to face in the longitudinal way.Under steady state condition find rate of heat transfer per unit face area and the temperature at the interface
Shubhrajyoti Ghosh asked a question
Subject: Physics, asked on on 28/2/17
If the temperature of a piece of aluminium increases by 1 oC, what will be the increase in energy of one of its atom? 27 g of aluminium has 6*1023 atoms. Specific heat of aluminium = 0.22.

[ Answer : 4.158*10-16 erg ]

NO LINKS PLEASE
Shubhrajyoti Ghosh asked a question
Subject: Physics, asked on on 11/1/17
-Two bodies , each having a mass of 3 Kg , collide with each other . One body was at rest and the other was moving with a -4m .s-1velocity . After collision they combine with each other . Find out the heat produced as a result of this collision . Mechanical equivalent of heat =4.2 j. cal​-1.
[Answer ; 2.86 cal​. ]
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Shubhrajyoti Ghosh asked a question
Subject: Physics, asked on on 28/2/17
What will be the specific heats of He at constant volume and constant pressure ? Gamma of He = 1.667 , R = 8.318 * 107 erg. mol-1.oC-1 , J = 4.18 * 107 erg.cal-1 and molecular mass of He = 4.

[ Answer : cv = 0.746 cal/g/ oC ; Cp = 1.243 cal/ g/ oC ]

NO LINKS PLEASE
Divyansh Bansal asked a question
Subject: Physics, asked on on 27/4/18
Solve this.
Q. A diatomic gas undergoes a process given by the equation P = KV where K is a constant. The molar specific heat of the gas for the process is
(1) R
(2) 5R2
(3) 4 R
(4) 3 R
Chirag Mudgil asked a question
Subject: Physics, asked on on 14/2/18
dear experts , please expalinme the derivation expessionfor the work done during the adiabeticexpansion of an ideal gas .
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