Recent content by Imperitor

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    Load Cell Accuracy | Capacity >200Kg | 10g or Better Accuracy

    Thanks guys, this discussion was very informative. I've got all the info I need now.
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    Load Cell Accuracy | Capacity >200Kg | 10g or Better Accuracy

    Thanks for the replies everyone, So as I understand it this accuracy is relative to the load applied? So with a 16kg load the accuracy would be 0.25% of 16kg = +-0.04kg or 0.02% of the full scale (200kg) load. Therefore with anything weighing more than 16kg this load cell is less accurate then...
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    Load Cell Accuracy | Capacity >200Kg | 10g or Better Accuracy

    Hi Everyone, I've been trying to find a load cell for a report and I need one with a maximum capacity of >200Kg and and accuracy of 10 grams or better (used in compression). I've taken a look on the web and the highest accuracy I can find is about 0.03% of the maximum capacity; which with a...
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    Terminal Velocity Help: Solving for Upward Force and Fall Time

    Fair is proportional to v2 v is proportional to 1/t Fair changes by a factor of 5. So velocity will change by a factor of \sqrt{5} And time will change by a factor of 1/\sqrt{5} So your answer should be t = 45 x 1/\sqrt{5}
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    The sagging effect and angular speed.

    As the object travels downward the potential energy it had is converted to velocity. This is why the object will speed up at the bottom and slow down at the top. Basically you take the change in height of the object, figure out how much potential energy was converted to kinetic energy over that...
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    What Is the Minimum Kinetic Energy Needed for Fusion in Stars?

    Yes. You nailed it.
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    Calculations involving freefall

    Remember that your using vf as 0 which is at its climax. The time you used is for the total time (up and down) not just the time to get to the climax.
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    What Is the Minimum Kinetic Energy Needed for Fusion in Stars?

    Would the answer not be the same as the answer for the first question? (1.152e-13 J)
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    Terminal Velocity Help: Solving for Upward Force and Fall Time

    But the height of the building does not change. Velocity = distance / time Since the distance does not change the only thing that can alter velocity is time.
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    Tension on a rope from jumping tightwalker

    "because of the tightwalker jumping upwards then the Force from the tightwalker is slackened" They want the tension as he jumps, before he leaves the rope. Hint: The tightrope walker pushes down to jump up, putting more tension on the rope.
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    Terminal Velocity Help: Solving for Upward Force and Fall Time

    force of air resistance is proportional to velocity^2 And you know the force increased by 5 times so the velocity would need to increase by...
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    Terminal Velocity Help: Solving for Upward Force and Fall Time

    (Hint: Consider the relation between speed and the force of air resistance.) force of air resistance is proportional to velocity^2
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    What Is the Equation of Motion for a Mass-Spring System in a Falling Box?

    Just think what happens when the box hits the ground. It will stop but the mass on the spring will still have same velocity because nothing is stopping it. The only contribution of the fall on the system is an initial velocity. Hope that helps.
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    Heat exchanger for anaerobic digestion

    In this equation you have an inlet and exit temperature (T1 and T2). If you changed the pipe dimensions and velocities you would likely get a different exit temperature. If you were designing this system you would not know the exit temperature and your your equation for T2 would include pipe...
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    Moment of inertia (disk with off center hole)

    Wait a minute... hit another snag. To use that theorem I need to know what the mass of the missing hole is. I only know the mass of the disk as is (with the hole in it). Also the first formula I gave could only be used if I knew what the mass of the disk was with the hole filled in. This is...