Recent content by shaools

and sorry, thank you for your patience lol.

OH okay. thank you!

E=P*t E=10*10^6W * 45 000s E=4.5*10^11 J so, the tide coming in twice doesn't have anything to do with anything, so ill leave out any dividing/multiplying by 2 that i thought i had to do. ill go straight to solving for mass. m=Eg/g*h m=4.5*10^11 J/ (9.8N/kg*3m) m=1.5*10^10 kg i really don't...

yes i understand now about the 85% now, thank you, but I am asking if there are any more errors. you said "first and most obvious problem". if that's the first, what are the rest?

so then the answer i get for my gravitational energy should be divided by two, not multiplied right? is there anything else wrong in the process?

Homework Statement A tidal power plant generates 10 MW of electricity during a period of 12.5h. Assume that the water is collected behind a dam 6.0m high and is allowed to pass through a turbine twice to generate electricity, once as the tide comes in and once as the tide goes out. What mass...

Ah well I appreciate all of you guys taking the time to look at this one. It's horrible when the back of the book is wrong :/

If you guys aren't getting it, then I'm probably not going to either. I'm just going to move onto the next question for now lol.

Thanks a bunch turin. I'm really fuzzy with this stuff so I keep coming up with more questions than answers :/. And yeah, trying to work backwards from 71N only gave me answers where I had to ignore some component or another of the question. O messy question. I guess I just meant a...

Lol, well the answer exactly is 71 N [N]. But aside from that, no, I'm sure this is all the information I've been given. ..Oh, but, when I tried asking my teacher for help, he seemed to think that the 60 N that was noted in the question was the net force, even though it is stated as the...

Ah okay, thank you. Say I have another question like this but I'm working with only one object, and all the forces I'm working with are vertical, how does acceleration work in with each of the vectors? Like for example, I have an object weighing 5kg, and gravity is pulling down on it at...

Oh and yes I'm sure about the answer being 71N, since its listed with the acceleration which is 2.2m/s^2, which is correct.

Hm, I have a few more questions. Should the force of gravity be doubled at bucket B because its got the mass of both buckets to pull down at that point? And also, when Fapp is applied to bucket A, how is that force translated to bucket B? This goes for any question with a force being applied...

Homework Statement Two buckets of nails are hung one above the other and pulled to a roof by a rope. Each bucket of nails has a mass of 5.0kg. The action-reaction force between the buckets is 60N. Calculate the acceleration and the force applied by the worker lifting them up. Given: (draw a...

a = [2(240m - 6m/s*30s)] / 30^2 a = 0.13m/s^2 yup :). thank you mr. fish !