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    B Why are two cellophane tapes attracted when ripped apart?

    Hello, I put two strips of cellophane tape adjacent to each other adhered onto a table. When I pull them both apart, they repel each other, both insulators ripped electrons from the wood. When I stack two strips of tape on top of each other on a table, rip the combined bundle off the table...
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    I Actual measurement of radioactive decay

    Hello, Are there any anthropologists, archaeologists, or geologists around on this board for help? I am trying to teach myself about radioactive decay via beta emission whereby a neutron spontaneously transmutes into a proton, releasing an electron. But, I do not understand the practical side...
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    Nitrogen transmutation to carbon-14 (radiocarbon) via gamma

    Hello, I am trying to fully grasp the transmutation of nitrogen into radiocarbon (radiocarbon or carbon-14) via gamma collision high in the atmosphere But, I don't because I cannot whether something also happens to the electron. The canonical description is thus. High energy gamma particles...
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    Why can't I show Newton's Third Law by different means?

    1. Homework Statement A small mass (1 kg) sits next to a larger mass (3 kg) on a table. A force of 5 newtons pushes from left to right on the system while a force of 3 newtons pushes from right to left on the system. Am I justified to conclude that the net force on the larger block has...
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    Does mass impact speed on a ramp?

    Mentors Note: Posts from a duplicate thread have been merged into this one. Hello, please explain the following in detail. I am a learning assistant (LA) at a major university but am stuck explaining a concept to my students. Does mass have an impact on an inclined plane? A cart with wheels or...
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    What are everyday ``nonlinear examples?

    What are everyday ``nonlinear" examples? Hello! Is there a simple way to identify a nonlinear equation or physical system by looking at it? I have sifted through material about unpredictability, chaos, fractals, and the other buzzwords encompassing ``nonlinear systems", and have glossed...
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    Expanding universe and light detection

    Sorry if this question has been reproduced elsewhere. If the universe expands greater than the speed of light, c, will a light ray from a distant object never reach us? Lawrence Krauss gave a nice presentation and commented about this, but this has thrown my nose out of sorts because I think...
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    Physics Dejected question about physics future

    Thank you for taking the time to read this frantic, incoherent pabulum. Question -- Would you leave physics Ph.D. graduate research to go teach at a very high-level preparatory school if 1) you really like teaching (and have taught for three years) 2) the salary the prep school offering...
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