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Ghosh Brothers
Subject: Physics
, asked on 2/5/18
two cars are travelling towards each other on a straight road at velocities 15 m/s and 16m/s . when they are 150 m apart, both the drivers apply the brakes and the cars decelerate at 3m/s and 4m/s until they stop. seperation between the cars when they come to rest is
Answer
1
Lavneesh Rajput
Subject: Physics
, asked on 28/4/18
when does the magnetic moment
is negative? please explain
Answer
1
Yashi Mishra
Subject: Physics
, asked on 19/4/18
Plz solve showing all steps.
Q.20. An ideal gas undergoes a polytropic given by equation
P
V
n
= constant. If molar heat capacity of gas during this process is arithmetic mean of its molar heat capacity at constant pressure and constant volume then value of n is
(1) Zero
(2) - 1
(3) + 1
(4)
γ
Answer
1
Royel Ghost
Subject: Physics
, asked on 12/4/18
pls answer FAST
Q.7. A closed vessel containing
N
2
O
4
gas is maintained at temperature of 298 K at 1 atm pressure is heated to 500 K. At this temperature 45 % by weight of
N
2
O
4
decomposes to
N
O
2
. What will be the final pressure of the gaseous mixture at 500 K?
A. 2.4 atm
B. 2.6 atm
C. 2.8 atm
D. 3.0 atm
Answer
1
Amitesh Kumar
Subject: Physics
, asked on 8/4/18
Please fast
EXAMPLE 11
A heater is designed to operate with a power of 1000 W in a 100 V line. It is connected in combination with a resistance of 10
Ω
and a resistance R, to a 100 V mains as shown in the figure. What will be the value of R so that the heater operates with a power of 62.5 W?
(JEE 1978)
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 30/3/18
Solve this:
42. A carnot heat engine has efficiency of 10%. If the same engine is worked backward to obtain a refrigerator, then coefficient of performance of the refrigerator is
(1) 5 (2) 6
(3) 8 (4) 9
43. In a process, the molar heat capacity of a diatomic gas is
10
R
3
.
When heat Q is supplied to the gas, then the work done by the as is.
1
Q
4
2
Q
3
3
2
Q
3
4
3
Q
4
Answer
1
Archit Anand K.p.
Subject: Physics
, asked on 13/3/18
A rigid container of neglible heat capacity has one mole of ideal gas if 3cal of heat changes the temperature by1C then the gas may be
1.He
2.Ar
3.O2
4.CO2
More than one options are right
Answer
1
Naga Nandhini
Subject: Physics
, asked on 7/3/18
Q. How 2.02 ? Is it the mass of hydrogen? Can't we use the rounded-off value?
Answer
1
Naga Nandhini
Subject: Physics
, asked on 7/3/18
I'm not understanding why they've not cubed it together,I mean they haven't bracketed, right? And then they've considered armstrongs in metre ,but while cubing it,they've taken wrong value. After that step what is written,I'm not getting..HELP..
#EXAMS..
#URGENT!
Answer
1
Naga Nandhini
Subject: Physics
, asked on 7/3/18
A 0.025m
3
tank contains 0.084kg of nitrogen gas N
2
at a gauge pressure of 3.17atm.Find the temperature of the gas in degree celsius.(use the value of p
atm
)
NO LINKS!
Do answer with a proper explanation. EXAMS! URGENT!
Answer
1
Naga Nandhini
Subject: Physics
, asked on 7/3/18
An oxygen storage tank has a capacity 0.05m
3
.The gas pressure is 100atm at 27degreeC.Determine a)the total KE of translation of molecules.
b)the average KE of translation of molecules
c)total KE
I've the solution but I'm not understanding the difference between the three while calculating,so please do explain me in simple words ,each question by answering here! EXAMS...URGENTT
Answer
1
Alok Singh
Subject: Physics
, asked on 6/3/18
5. Name any two factors on which the degree of freedom of gas depends?
Answer
1
Naga Nandhini
Subject: Physics
, asked on 6/3/18
Initial momentum=mv
Final momentum=-mv
Change in momentum=-2mv
Change in momentum of molecule=2mv
Answer
3
Naga Nandhini
Subject: Physics
, asked on 4/3/18
How can gaseous molecules have gravitational field? How's it related between 2 molecules?
Answer
1
Rijo
Subject: Physics
, asked on 4/3/18
Calculate the temperature at which rms velocity of gas molecules is double its value at
270C, pressure of the gas remaining the same.
Answer
1
1
2
3
4
5
Next
What are you looking for?
is negative? please explain
Q.20. An ideal gas undergoes a polytropic given by equation = constant. If molar heat capacity of gas during this process is arithmetic mean of its molar heat capacity at constant pressure and constant volume then value of n is
(1) Zero
(2) - 1
(3) + 1
(4)
Q.7. A closed vessel containing gas is maintained at temperature of 298 K at 1 atm pressure is heated to 500 K. At this temperature 45 % by weight of decomposes to . What will be the final pressure of the gaseous mixture at 500 K?
A. 2.4 atm
B. 2.6 atm
C. 2.8 atm
D. 3.0 atm
EXAMPLE 11 A heater is designed to operate with a power of 1000 W in a 100 V line. It is connected in combination with a resistance of 10 and a resistance R, to a 100 V mains as shown in the figure. What will be the value of R so that the heater operates with a power of 62.5 W? (JEE 1978)
42. A carnot heat engine has efficiency of 10%. If the same engine is worked backward to obtain a refrigerator, then coefficient of performance of the refrigerator is
(1) 5 (2) 6
(3) 8 (4) 9
43. In a process, the molar heat capacity of a diatomic gas is When heat Q is supplied to the gas, then the work done by the as is.
1.He
2.Ar
3.O2
4.CO2
More than one options are right
#EXAMS..
#URGENT!
NO LINKS!
Do answer with a proper explanation. EXAMS! URGENT!
b)the average KE of translation of molecules
c)total KE
I've the solution but I'm not understanding the difference between the three while calculating,so please do explain me in simple words ,each question by answering here! EXAMS...URGENTT
Final momentum=-mv
Change in momentum=-2mv
Change in momentum of molecule=2mv
270C, pressure of the gas remaining the same.