Recent content by sauri

I am having a difficulty understanding how the van de Graaff generator works. Especially with the charge configuration diagrams. Can anyone help to clear the steps involved with the charge generation process?

Well i was wondering what kind of calculations could be counducted on a swimmer and how they could be resolved?

That helps a lot thanks..one other thing though. If we were to fnd the speed of the swimmer, is it still applicable to use the linear equations of motion?

ok, so to oppose the downward gravitational force we have the upward force provided by the water, which gives us buoyancy. Can we call this the normal force?. So apar from this are there any other force that need to be accounted for?

I have this assignment where I am supposed to list all the forces acting on someone who is swimming in a standered olyimpic sized pool. The obvious force to me was the mass of the swimmer acting downwards and presuming the guy was swimming forward there would be a drag force acting backwards...

ah, I got it. You end up with (x- 6)(x- 2). and only x=2 would apply for the equation. Thanks

The answers vary between -1.29 and 9.29, Still off

O.k, this time I tried the copleting the square method: -x^2+8x-12=0 -x^2+8x=12 (x+4)^2=12+16 (x+4)=\sqrt28 4+\sqrt28 or 4-\sqrt28

If I use \sqrt{2x-3}= 3- x, I then worked it out to 2x-3=9-6x+x^2 2x+6x-x^2=9+3 8x-x^2-12=0 So I re-wrote as; -x^2+8x-12=0 (x+6)=0 or (x+2)=0 but then the answers add up as x=-6 or x=-2. and that can't be right..

I got this algebra problem that I have been trying to get around but the answer I get is always different from the book. It says: Find all the real solutions, if any of each equation. 21). \sqrt{2x-3} +x=3. I tried to resolve it using the following method: 2x-3+x^2=9...

2) Find an expression for the velocity of a particle in the medium while a wave is going through, and its acceleration. I first thought that the particle might under go simple harmonic motion when the waved passed but then I remembered that the speed of a wave is determined by the properties...

I got a question, what is the maximum speed of an object undergoing SHM? and what is the max. acceleration. I am not sure how to solve this without any data given. I know that velocity v=-Awsinwt. and accleration is a=Awcoswt. So how am I to find the max speed and max acceleration?. Pls help.

A golf ball is putted too fast and rolls past the hole in a straight line, coming at closest approach to a distance d from the hole. Ignore friction and assume that golf ball moves at constant velocity. What is the angular momentum of the golf ball about the hole? Is the angular momentum...

A merry go round can be described as a horizontal platform in the shape of a disc which rotates on a frictionless bearing about a vertical axis through its centre. The platform has a mass of 150 kg, a radius of 2.0 m and a rotational inertia of 300 kg.m2.A 60 kg student walks slowly from the rim...

where r=2(pi) right?. Then we find v and sbstitute to (mv^2)/2=(Iw^2)/2 and find I which we sunstitute into L=Iw and find L right?. so what's I = mr^2 for?