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• Build a Stun Gun: Radio Parts & More

  I saw this article on exploring a stun gun on this website http://www.emanator.demon.co.uk/bigclive/stunner.htm and my only problem was finding the parts...

• Physics Forums

  Join Physics Forums, where students, scientists, and enthusiasts come together to explore and discuss the current understanding and practice of various...

• Fukushima Daiichi nuclear disaster discussions

  There are several threads related to the disaster: Japan Earthquake: nuclear plants - technical aspects of the situation at the Fukushima Daiichi NPP (and...

• Work energy KE theorem for a book being lifted up in a gravitional field

  For this, From the work kinetic energy theorem, if we assume that the book and the earth is the system, and that the finial and inital speed of the system...

• Difference between G-force and Grms

  I am currently doing a vibration analysis using a random vibration machine which gives Grms value based on Power Spectral Density (PSD) plot using Fast...

• Proving the Equivalence of Local and Global Maxima for Concave Functions

  Consider the following theorem: Theorem: Let ##f## be a concave differentiable function and let ##g## be a concave function. Then: ##y \in argmax_{x}...