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Anupal Das
Subject: Physics
, asked on 2/1/18
Calculate the molecular KE of 1 gram of helium (molecular weight 4 at 127degree C. R=8.31 J mol
-1
K
-1
Answer
1
Anupal Das
Subject: Physics
, asked on 2/1/18
if a gas has 'f' degree of freedom, find the ration of C
p
and C
v
Answer
1
Anupal Das
Subject: Physics
, asked on 2/1/18
how specific heat capacity of mono atomic, diatomic and poly atomic gases can be explained on the basis of Law of equi partition of Energy?
Answer
1
Anupal Das
Subject: Physics
, asked on 2/1/18
which of the following functions of time represent a)SHM, b)periodic but not SHM and c)non-periodic motion? Give the time period of each periodic motion: (i)sin wt + cos wt (ii) sinpiet + cos 2piet + 3sin3piet and (iii)sin
2
wt, where w is a positive real constant.
Answer
1
Anupal Das
Subject: Physics
, asked on 2/1/18
The radius of mercury drop at 20degree C is 3mm.If the surface tension of mercury at this temperature is 4.65*10
-1
Nm
-1
then find the excess pressure inside the liquid drop.
Answer
1
Anupal Das
Subject: Physics
, asked on 2/1/18
List the factors effecting the speed of sound in a gaseous medium.
Answer
1
Avika .
Subject: Physics
, asked on 1/1/18
If the mass of each molecules of gases is half and speed is doubled find the ratio of initial and final pressure
Answer
1
Palak
Subject: Physics
, asked on 10/12/17
1
m
o
l
e
o
f
a
g
a
s
h
a
v
i
n
g
γ
=
7
/
5
i
s
m
i
x
e
d
w
i
t
h
1
m
o
l
e
o
f
a
g
a
s
h
a
v
i
n
g
γ
=
5
/
3
.
W
h
a
t
w
i
l
l
b
e
t
h
e
d
e
g
r
e
e
o
f
f
r
e
e
d
o
m
f
o
r
m
i
x
t
u
r
e
?
(
1
)
5
(
2
)
3
(
3
)
4
(
4
)
6
Answer
2
Palak
Subject: Physics
, asked on 9/12/17
The temperature of gas is —73
o
C. To what temperature should it be heat
(a) average kinetic energy of the molecule is doubled ?
(b) the root mean quare velocity of the molecules is doubled ?
Answer
1
Palak
Subject: Physics
, asked on 9/12/17
Q. 2 answer with solution
2.
The temperature of gas is
-
73
°
C
.
To what temperature should it be heated so that
(a) average kinetic energy of the molecule is doubled ?
(b) the root mean square velocity of the molecules is doubled ?
Answer
2
Arshia Sharma
Subject: Physics
, asked on 7/12/17
Example 31
Q .Example 31
. How many degrees of freedom are associated with 2 g of He at N.T.P ? Calculate the amount of heat energy required to raise the temperature of this amount from 27°C to 127°C. Given Boltzmann's constant =1.38 × 10
–16
erg molecule –1 K–1 and Avogadro's number = 1.02 × 10
23
.
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 17/11/17
in a box of volume v there are n molecules if avg ke per particle is e
what is total energy of box
temp of box
pressure of box in terms of v n e
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 17/11/17
density of a gas is 1.5 kg/m^2 at a temp when pa is 1.2 *10^5 n/m^2
rms of gas molecules at this temp?
if vx is component of velocity along x axis find rms of vx?
what is mean value of vx 0
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 16/11/17
avg translational ke of o2 is 0.048ev what is
avg ke of translation
avg ke of rotation of nitrogen at same temp?
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 16/11/17
no of molecules per unit vol in ideal gas at 27 deg c if pressure of gas is 10^-10 mm of mercury
Answer
1
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What are you looking for?
(a) average kinetic energy of the molecule is doubled ?
(b) the root mean quare velocity of the molecules is doubled ?
2. The temperature of gas is To what temperature should it be heated so that
(a) average kinetic energy of the molecule is doubled ?
(b) the root mean square velocity of the molecules is doubled ?
Q .Example 31. How many degrees of freedom are associated with 2 g of He at N.T.P ? Calculate the amount of heat energy required to raise the temperature of this amount from 27°C to 127°C. Given Boltzmann's constant =1.38 × 10–16 erg molecule –1 K–1 and Avogadro's number = 1.02 × 1023.
what is total energy of box
temp of box
pressure of box in terms of v n e
rms of gas molecules at this temp?
if vx is component of velocity along x axis find rms of vx?
what is mean value of vx 0
avg ke of translation
avg ke of rotation of nitrogen at same temp?