Recent content by ReMa

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    You are looking up from underwater in a swimming pool radius of circle?

    So that deals with critical angle then? sin(theta)c = n1/n2 where n1 = lesser indice n2 = greater indice Hows does that relate to radius of a circle??
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    You are looking up from underwater in a swimming pool radius of circle?

    Homework Statement You are looking up from under the water in a swimming pool. If you are 2m below the surface, what is the radius of the "hole" at the water surface through which you can see out of the pool? Homework Equations n.sin(theta)1 = n.sin(theta)2 The Attempt at a Solution...
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    Help with Questions on Length, Sound, Heat, & Motion

    Bump.
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    Power Dissipation (more than one battery)

    Homework Statement For the circuit shown, find the power dissipated by the 10.0 ohm resistor. (as attached) Homework Equations P=IV=I2R=V2R V=IR The Attempt at a Solution I really don't know where to start with this. I'm basically tied up in the fact that there are three...
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    Doppler Effect: Moving Observer riding on moving source With reflection off wall

    I was confused about that too, but am now thinking I misread some of my notes... which would explain A LOT of why that didn't make sense to me. Could you check my two possible solutions and let me know if either is correct?
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    Doppler Effect: Moving Observer riding on moving source With reflection off wall

    Homework Statement A bus is moving at 37.00m/s towards a wall. The sound from the bus has an original wavelength of 0.1500m. The sound from the bus reflects off the wall. What frequency sound does an observer on the moving bus hear from the reflection?? Homework Equations Moving Observer: fo...
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    Help with Questions on Length, Sound, Heat, & Motion

    Hi There, I have a handful of questions I need help with and figured compiling them in one thread was the best option. For the most part, I've added these because I just don't know where to start and can't figure it out at all. Here we go!QUESTION ONE: Homework Statement A bar of copper with...
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    How Is Power Calculated in a Conveyor Belt System?

    I have two questions regarding this, any help would be GREAT! 1st Problem: Homework Statement A conveyor belt lifts 1000kg of rocks per minute a vertical distance of 10m. The rocks are at rest at the bottom of the belt and are ejected at 5 m/s. The power supplied to this machine is: A)...
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    Solving for variables using 3 different equations (simultaneous equations)

    Homework Statement Solve for A, T1 and T2. Equa 1) T1 + 25.0a = 245 Equa 2) T2 − 10.0a = 98.0 Equa 3) T1 − T2 − 80.0a = 78.4 Homework Equations As above. The Attempt at a Solution I isolated a in the first equation: a = (245-T1)/25 and T2 in the second equation: T2...
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    Fluid Dynamics Question: A glass tube areas, pressure, determine height.

    http://home.cc.umanitoba.ca/~loly/102-dec_word.pdf The above is a link to the problem - Question #3. Homework Statement A glass tube has several different cross-sectional areas with the values indicated in the figure. A piston at the left end of the tube exerts pressure so that the mercury...
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