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  • Why Skepticism?
    via csicop

    Twenty years ago, I became actively involved in the skeptical movement when I and several others founded a humble local skeptical group. We were inspired by CSICOP (now CSI) and Skeptical Inquirer to add what we could to efforts to make the world a more...

  • Tunisia may be geographically small, but it is historically big. Its 3,000 years of history have been filled with several milestones shaping the country into what it is today. Now, Tunisia is working hard to accelerate the pace of its development. It...

  • By Colleen Flaherty “Since the first decade of the new millennium, the words ranking, evaluation, metrics, h-index and impact factors have wreaked havoc in the world of higher education and research.” So begins a new English edition of Bibliometrics...

  • Many brilliant products of research end up feared and rejected by the mainstream society. Technologies such as vaccinations, genetics in agriculture or animal models in medicine can save lives, feed the world and preserve the planet but are distrusted...

  • Meet Paul Kennedy
    via scibraai

    Paul is a science communicator at ScienceLink and a volunteer at SciBraai, based in Cape Town (info as at May 2015) My work is all about science communication (aka “scicomm”). Picture provided by Paul Kennedy How I define scicomm: For me, science...

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  • psi is given above. I have checked multiple times but can't find my mistake. Thank you!

  • I want to make an organic steam engine. As a test, demonstrative And from what I've read to find a method to recover the steam and turn it back into liquid. I am looking for a substance that has a boiling point closer to room temperature. Possibly...

  • The efficiency of a heat pump is $$\mathcal{\epsilon}_{ref}=\frac{T_C}{T_H-T_C}=\frac{275}{29}=9.48$$ where ##T_H=304K## is the hot reservoir and ##T_C=275K## is the cold reservoir. The efficiency of the heat engine is $$\mathcal{\epsilon}_{eng}...

  • The efficiency of a heat engine is calculated as ##\eta = |W|/|Q_h| = 1- |Q_c|/|Q_h|##. If this engine operates between the temperatures ##T_c## and ##T_h##, then Carnot's theorem states that ##\eta<\eta_C = 1-T_c/T_h##. This means ##T_c/T_h &#6...

  • How do you draw the heat pump in the p-V diagram? Currently, it refers to the Carnot cycle, which has two isotherms and two adiabatic ones. But I think that there is no isotherm in the heat pump, as well as the refrigerator. On one heat sink it absorbs...

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  • My self | Physics Forums

    I am Syed Taha Ahmed from Karachi , Pakistan. I am doing my undergraduate in electrical engineering from Fast Nuces university

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