Recent content by Eberhard
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Can you get pulled under a train?
First there is a pressure surge, then a weaker suction at the end. Only if you are standing very unsteadily could this cause you to fall over. In Austria, a stroller once rolled under a train. The slight jolt was enough to set it rolling. Since then, there have been straps on the platform to...- Eberhard
- Post #37
- Forum: Mechanical Engineering
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Mass, density, volume: Find the volume of an alloy
I find it clearer if you calculate with symbols and only insert the values in the final formula.- Eberhard
- Post #13
- Forum: Introductory Physics Homework Help
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Mass, density, volume: Find the volume of an alloy
You can check your result by calculating the density with your values and checking if the correct result comes out.- Eberhard
- Post #12
- Forum: Introductory Physics Homework Help
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Finding the mass of two metals in an alloy
You can calculate the volume from the buoyancy. Then probably the assumption is made that the volume of the alloy is composed of the mixing ratio of the two parts, is a simplification because the alloy will have a greater density. Volume(alloy)=Volume(Au)+Volume(Ag). So set up the mixing...- Eberhard
- Post #3
- Forum: Introductory Physics Homework Help
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Finding the WORK done by a crane in lifting a load
In such tasks, many things are simplified, because otherwise it becomes too difficult, one then also no longer sees the principle represented. So there is no friction, which is why the horizontal displacement can be done with zero force. And if force F=0, F*s is also 0.- Eberhard
- Post #10
- Forum: Introductory Physics Homework Help
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Why can the potential energy at any point be chosen to have any value?
Perhaps MgL/18 was not understood. My explanation for this is: given: L length of the chain 1 third hangs down M Mass of the chain searched: Work for stroke of chain on table Formula: W=mgh The thickness of the chain is neglected, otherwise thickness/2 would have to be added to the lifting...- Eberhard
- Post #38
- Forum: Introductory Physics Homework Help