Recent content by Scatteredheroes

Homework Statement Zinc hydroxide has the chemical formula of Zn(OH)2. It has a very low solubility. What is the solubility in g/L of Zinc Hydroxide in a solution with a pH of 8? Homework Equations zinc hydroxide formula 14-pH = pOH[/B]The Attempt at a Solution 10^-6 (the pOH) gives me the...

Homework Statement A 2kg block slides down a 3 m long ramp that is inclined at 40 degrees. The coefficient of friction is .2 What is the velocity when it hits the bottom of the ramp? Homework Equations Kinetic = 1/2 mv^2 Potential = mgh Work of friction: Fnμ*(displacement) The Attempt at a...

Him. He also told us to add the 37 degrees because he forgot to add it onto the photo; and I've typed the statement up to a T.

Oh, no, that was just me trying to figure out the angle. He said nothing about B and D being the same point.

So; even with the picture our teacher gave us, it is unsolvable?

And here; a photo of the question

"An 11 kg traffic light hangs from a structure as shown. The uniform aluminium pole AB is 7.5 m long and weighs 8kg. Determine the tension in the cable CD"

The exact question is: An 11kg traffic light hangs from a structure as shown. The aluminium pole AB is 7.5m long and weighs 8 kg. Determine the tension in cable CD. He told us the angle CDA is 37.

We don't know AD.

Sorry; I didn't proof read before I posted. AB is 7.5 m. We are given the weight of the pole, the stoplight, the angle of 37 degrees, the length of AB and that is all.

AB is the 7.5 m. And r1(f1) is the pole being (8)(9.81)cos37 (8 is mass of pole) and r is the distance from the center of mass to the pivot.

The image in the attachment in my original post is the exact question I'm doing. The information I I gave in my original type up of the question is what we're given.

Sorry, I forgot to add tan. Also; ignoring AC because that's not on the question we were given, our teacher changed it up a little before handing it to us. The photo I posted was just the closest approximation to the one he's given us.

Homework Statement An 11 kg traffic light hangs fro ma structure as shown. The aluminium pole AB is 7.5 m long, and weighs 8 kg. Determine the tension in cord CD Homework Equations T = rf[/B]The Attempt at a Solution Ignore the AC height of 3.8 m, and replace it with an AD length of 7.5...

I don't want to google it and copy it so I can learn from this. Thanks for the site. I just have one quick question. When they ask for the average volume of permangate ion used, is that the average volume of all the kmno4 used during titrating, or something else?