
Molecular physics
Authored by Гулдарига Мырзабас
Physics
10th Grade
Used 5+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Q1=100 kJ, Q2=60 kJ. what is the efficiency this engine machine?
0.4%
40%
60%
0.1
2.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
There is an oxygen gas in the container at 200kPa pressure. Root mean square speed of the molecules is 400 m/s. What is the molecular concentration ?
9.04*109 m-3
2*1018 m-3
7*1025 m-3
12.71*1019 m-3
3.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
The volume of a gas increases by 20% when its temperature is increased by 55 0C at constant pressure. What is the initial temperature of the gas?
4.
MULTIPLE SELECT QUESTION
2 mins • 1 pt
An ideal gas sample isothermally expands from 0.3 L to 0.8 L. What is the change in the internal energy of the gas during the process, if its initial temperature is 300K?
100 J
50 J
0 J
-50 J
5.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
What is the partial pressure of water vapour in air at 200C, if the relative humidity is 40%? The vapour pressure of water at 200C is Pv=2333 Pa.
100 kPa
933 Pa
88 MPa
60 kPa
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