Recent content by jamesd2008

Also what is the situation if the cylinder is completely sealed?

I was trying to apply the gas laws, but vapour pressure is something I'm not familiar with.

Thanks for your replies, you give me a good start at reading further on this. Thanks

Hello everyone, Could someone help me with the following question: I'm trying to find out the equations that govern this process; why if you condense steam in a cylinder is a partial vacuum created (such as in early steam engines)? The pressure difference then causes the atmosphere to push...

Sorry don't no why this is uploading the wrong way round. The reaction supports should be on the left side.

Another picture hopefully the right way round :-)

Homework Statement In the enclosed picture is a loaded beam and strut, what I need to do is determine the reactions at the supports. The problem is that I think the beam is indeterminable because there are more than three reactions? Homework Equations I do no the three equations of...

Thanks everyone, that all makes sense :-)!

So if I was in space would this happen?

Wow, ok thanks. Just trying to absorb this.

If I take an empty ordinary drinks bottle, place it in my mouth and suck, the sides collapse in wards. Is this because I have reduced the pressure in the bottle and the weight of the atmosphere is crushing it? Thanks in advance James

Thats great thanks for your input, So although the energy is conserved, to gain practical useful work extra heat is needed?

In my thermodynamics book it states that the first law is, " When a system undergoes a complete cycle the net heat supplied plus the net work input is zero" And then it states that for the second law, "In any complete cycle the gross heat supplied plus the net work input must be greater...

If the first derivative of a function represents the gradient of the tangent line... What does the second derivative represent? Thanks in advance James

Ok thanks. Suppose what I'm really asking is what sort of temperatures does diesel ignite?