Recent content by Acnhduy

:frown:

Hi all, I'm having some trouble figuring out why entropy is used instead of enthalpy for an open system. From what I understand, an open system uses entropy to calculate internal energy. Since the control volume is constant (i.e. Δv = 0), wouldn't using : h = u + PΔv effectively be h = u? So...

Aha, thanks for your suggestions. then if I do end up going for a pc, I would be looking at ultrabooks for their form factor and portability. But looking at some ultrabooks, their prices seem to reach around $1400. I punched in the macbook pro processor and the processor in some of the more...

Hello all, I am currently looking at laptops to use for school. I will be going to university this fall for general engineering. I may focus on chemical, mechanical, aerospace, or biomedical engineering. I am looking for something light and portable, with long battery life, and sufficient...

Mhm. Didnt even notice that it could be changed to secant. Thankyou

Homework Statement A man tosses object with initial velocity of 20 m/s into a room, and is 2.0 m above the ground. The room is 10.0 m above the ground. In a provided diagram, the distance from man to room horizontally is 31.8 m. I am required to solve for the angle of the object as it...

Thanks for the help :). After correcting that I end up with 76° :D

Ok I see what you mean. I'm left with 2 instead of 'a'. Mistakened as a square

Ohhh

If one side has "2a" and the other has "a", can't you divide out one of the "a" by dividing both sides by it?

I got sin2θ = aysin2θ from (V2sin2θ)/2ay = (V2sin2θ)/ay Cross multiply and cancel out one of the ay ay(V2sin2θ) = 2ay(V2sin2θ) ay (V2sin2θ) = 2 ay(V2sin2θ) Divide both sides by V2 V2sin2θ = ay(V2sin2θ) sin2θ = aysin2θ

Homework Statement At what projection angle will the range of a projectile equal its maximum height? Homework Equations Big 5 vf2= vi2 + 2ad The Attempt at a Solution So I attempted to solve this question by randomly subbing in equations into each other. If i draw out a diagram to solve...

Can anyone recommend any EC's that I should be involved into strengthen my chances of acceptance? Much appreciated,

Hello all, I am currently in grade 12 and looking to apply for engineering (possibly mechanical) but I am not sure which schools to choose from. I live in Ontario and would prefer a school within the province. The schools that I am interested in are UofT, Waterloo, McMaster, Queens, and...

Homework Statement I was wondering whether striking a match is endothermic or exothermic. Homework EquationsThe Attempt at a Solution This seems quite straight forward as striking a match releases heat, which is obviously exothermic. However, the process of igniting the match requires heat...