Recent content by bradycat

A gas expands according to the equation pv=1000. where p is pressure in kPa and v is specific volume m^3/kg. If the gas pressure drops from 1000 to 500kPa, how much work was done by the gas?? Ok I am new to thermo and given a question and can't figure it out. Do I use net flow work =...

Here is the picture of the item I am talking about. #4 on the sheet of course. I get an answer x bar as 1.85 and y bar 2.92. I have for y bar = 4(.25) + 2(3.38X4.5) / 10.76 I have for x bar = (4x4) = 2(3.38x.571) / 10.76 From the american standard channels for C 8 X 11.5 Area is 3.38, Depth...

I have a problem trying to find the centroid. I have a plate that is 8in wide and .5 in thick. Then 2- C beams (C8x11.5) placed at each end of the 8in beam with the tips facing each other. They do not go beyond the 8 inches. So it's like a U as an example with the tips facing each other. I...

Hi, The problem attached is a kinetic problem. problem # 50. This is from belts friction that this question is from. All my other problems have dealt with static, and now with kinetic, I am stuck on what to do. There is no impending motion that I know. Would I take the rope with the 45...

I got it all, I was confusing it with something else, why I was having the problems in the first place.

Curve Sketching... Curve Sketching stuck Hi, Stuck on curve sketching on the following. You have part A which is finding the x-intercepts when y=0. y = x^5 -5x 0=x^5-5x x(x^4-5)=0 X=0 and then x^4=5? stuck here Then Part b is min/max when y'=0 y'=5x^4-5 5(x^4-1)=0 5=0 CANT...

Attached are 3 problems that we were never shown in class on how to do it. I have a test in 3 days and need to figure this out, and no more class time. Question 10 12 and 13. We NEVER did anything with angles in it. And nothing like pulleys this way either. As for 12 I see you have to do...

I am trying 4-4 and still not getting it. T1&T3 are 981 N and T2 is 1960 N. Can you explain it more in detail perhaps, thank you Joanne

I am trying to solve the tension in the cable system and I can not get to the answer. See attached file for question 4-4 and 4-6. I have no clue as to what to do with the 100 kg weight on the 4-4 problem. As for 4-6. I came up with 7 T at the p arrow, and when I multiply that to 3 for...

I have a problem and I can't solve it. Do I have enough info? Two knights on horseback start from rest 88.0m apart and ride directly toward each other to do battle. Horse A accelleration has a magnitude of 0.300 m/s^2, while Horse B has a magnitude of 0.200 m/s^2. Relative to Horse A's...

Hi Ideasule. So the -80.3614 m/s is correct? So the Vi can have a negative number then? I thought it could not have a negative on a Vi?

Hi Kurdt, I used the time formula where you use distancex2 over acceleration. THAT is wrong your saying? What formula should I use?

Did I do this right an F=ma need to find Initial Speed? Need help on this. A car whose mass is 2600 kg can produce an unbalanced braking force of 2765N. Calculate the car's initial speed in order to have a stopping distance of 3036.3m. Vi=? So... m=2600kg F=2765N s=3036.3m Vf=0 So I...