Recent content by chenying

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    Finding the force of water in a pool on a vertical wall

    I did and came out with the right answer. Thanks a lot!
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    Finding the force of water in a pool on a vertical wall

    Oh, I guess that is rather large... But yes, you are right, atmospheric pressure is the pressure at the surface, but the problem states to not take that into account.
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    Finding the force of water in a pool on a vertical wall

    Why would 2.5 be the sensible height? i thought it would be the width of the pool.
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    Finding the force of water in a pool on a vertical wall

    Homework Statement A swimming pool has the dimensions 24 m multiplied by 9.0 m multiplied by 2.5 m. (a) When it is filled with water, what is the force (resulting from the water alone) on the bottom, on the short sides, and on the long sides? Homework Equations F = P*A P =...
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    Skidding and rolling without slipping of a bowling ball

    Homework Statement A bowler throws a bowling ball of radius R = 11 cm down the lane with initial speed v0 = 8.5 m/s. The ball is thrown in such a way that it skids for a certain distance before it starts to roll. It is not rotating at all when it first hits the lane, its motion being pure...
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    Finding Center of Mass Between Earth and Satellite

    What variables were given to you? If you know the distance of the satellite from the earth, it is the variable x2.
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    Leaning tower of pisa and rotational dynamics

    Well the normal force is at the edge of the base. The center of mass, at the point where the it aligns with the base, is when it starts to tip, based on what you said. But what is the proof for that? The sum of all forces in the y-direction at this point would be past 0 because the...
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    Leaning tower of pisa and rotational dynamics

    Well, when the tower is about to fall over, the normal force acts in the positive y-direction at the base of the tower and the weight acts in the negative y-direction at the tower's center of mass.
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    Leaning tower of pisa and rotational dynamics

    Homework Statement The leaning Tower of Pisa (Fig. 9-47) is 55 m high and 7.0 m in diameter. The top of the tower is displaced 4.5 m from the vertical. Treat the tower as a uniform, circular cylinder. (a) What additional displacement, measured at the top, will bring the tower to the...
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    Calculating v/c of a proton and electron

    Turin: I did it your way and I also got that v = 3e8...
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    Calculating v/c of a proton and electron

    um... I solved for v and got 3e8..... I have no idea what I'm doing wrong... sorry if I am frustrating you btw.
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    Calculating v/c of a proton and electron

    \frac{v}{c} = \frac{pc}{E} \frac{v}{c} = \frac{mv\gamma}{mc^2\gamma} in which case becomes \frac{1}{} = \frac{1}{c} i realized originally i made a mistake but now i got something different...
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    Calculating v/c of a proton and electron

    So then what is the p in the equation? And I did the algebra, and tried to solve for v, but i keep running into trouble. I keep getting a value of 0 whenever I use the algebra...
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    Calculating v/c of a proton and electron

    does the p in equation 1 represent?
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    Calculating v/c of a proton and electron

    Thanks, that helped a lot. But where did you get equation 1? Is it a ratio or was it derived?
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