21. Subject:physics question bank, set3, 6-10, question 9, seems to be wrong on nov 11 2015
The molecules of a solid are arranged in a tightly-packed, ordered lattice. Intermolecular attraction keep them so tight. However in liquids the attraction is less and in gases there is no attraction. When heat is added, the heat energy causes the molecules to vibrate and move. Molecules in gases have more space to move around than on liquids. That is why gases expand more compared to liquids.
22. Question bank, set 3, 6-10, question 9, seems to wrong
Nov 10 2015
I need to know the subject please
23. Question bank, set 3, 6-10, question no 7, i can\'t understand can you explain
Hi Can you please tell me on which subject
24. In the the module 15
set 2 , qustion 41-60 question no 13#
In a gas turbine engine, turbine section
1#temperature decreases along with pressure and velocity
2#velocity decreases and pressure increases
3#velocity increases and pressure decreases.
i think the answer should be re checked because in turbine section all kinds of energies are converted into the mechanical energy like kinetic pressure and heat energy all are converted into mechanically majorly so how could velocity increases in that.. yup in exhaust nozzle velocity increases but how can it be in turbine section..
After compression and combustion have heated the air, an increase in the velocity of gases is necessary in order for the turbine rotors to develop power. In the compressor, energy is added to the gas by the rotor blades, then converted to static pressure by the stator vanes. In the turbine, the stator vanes increase gas velocity, and then the rotor blades extract energy.
25. Set 1 matter, question 6-10 of 20, 6th question \"what is the valence of oxygen\" the answer says 2 how come \'2\' ?
Valence electrons are the number of electrons in the outermost energy level of an atom. Valency is the number of electrons an atom needs to gain or lose in order to have a full outermost energy level.So the oxygen needs 2 electrons to fill the outermost orbit
26. What is "Alert height"?
In simple terms, Decision Height is the height where pilot should make a decision to land or to go around based on visual reference. but Alert height (AH) is the height where below AH, the approach will be continued (except if AUTOLAND warning is triggered).
For detail explaination check under aerochapter notes: short notes: decision height
27. In Mod-13,Set-5,21-40,Q-10 figure missing.
Thanks. Image updated
28. In Mod-3,Set-5,21-40,Q-10 figure missing.
The question do not require image. Its about step up transformer
29. In Mod-13,Set-7,81-100,Q-8.....ur answer is "Pitch ctl",suppose to be "Yaw ctl".Pls confirm.
30. In Mod-13,Set-8,61-80,Q-5 option (a) not available....but that was marked as Correct answer....pls chk it....& Q-20) Which type of radio waves are used for line - of - sight communication? Your answer is Sky wave....but it is incorrect....the answer suppose to be " Space Wave ".Pls confirm.