Recent content by jamesabc

the water would evaporate and reduce the air temperature, floor temperature. but since this is a closed system when you are adding the water to that system which is at the same air temperature inside wouldn't the energy in that system increase? and there fore the room temperature would increase...

it actually isn't homework, i have completed a BE in mechanical about a year ago, i was just thinking about humidity and how it works. i guess temperature would go up as you are adding more energy to the room, that's if the water has more energy at 25 degrees than air. that's what i think.

say there is a room 30 square meters by 2.5 meters high, completely insulated. if the room is at 25 degrees Celsius and 30% relative humidity then suddenly you bring in 10 liters of water at the same temperature and pour it on the floor; question is will the temperature of the room increase due...

even if the air molecules were frozen in space as if it were a solid, would the water still diffuse?

say there was no wind at all, no air movement. would your clothes still dry?

i understand for water, but for air where gravity is weaker the further you are away. i guess there is no air flow into space because the pressure difference will be getting smaller and smaller as you get higher. but is that to say no air will be expelled into space? like how water evaporates...

pressure is high at low altitudes but pressure decreases at higher altitudes. so why doesn't air get sucked into space which is a vacuum? the pressure difference should cause air to flow into space. or am i missing some simple explanation.

joint configuration. one plate is placed over the other and lap welded. like this: http://www.laserk.com/media/wp_fig5.jpg

I am looking to determine stress distrubution is overlap welds with some samples which have been tensile tested in a tensile testing machine. i want to find where there is the highest stress concentrations etc. how can i do this?

i have some specimens that i need to examine for a project and this involves trying to understand the microstructure of some materials under the microscope. is there some guide that tells you what the basic properties of microstructures are?

home work question aye?

if you stood on a mountain would you be able to look straight ahead with a powerful telescope and see the back of your head? or would you just look out into space?

so during recrystallization crystals actually do not move as such but do change shape by growing smaller and or larger? also by grains and crystals you mean a group of molecules that gather together to make up a larger body. im still trying to learn about this new topic. thanks

i read up recrystallization on wikipedia and it said "Recrystallization is a process by which deformed grains are replaced by a new set of undeformed grains that nucleate and grow until the original grains have been entirely consumed." so is recrystallization where the molecules and atoms...

in class once the teacher was showing some things to us from his computer by a projector. here's what happened. the background (wallpaper) on his computer was black and he was projecting onto a white board. question: did you think the white board went black or stayed white?