Recent content by richghost

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    Engineering Where is the bandpass filter in this circuit?

    Thank you so much! Now, it makes sense! Thanks again!
  2. R

    Engineering Where is the bandpass filter in this circuit?

    Homework Statement I am doing a project on the Elenco AM/FM superheterodyne radio kit. I have been stuck for ages trying to figure out how the two common emitter amplifiers are tuned to filter out anything that is not around 455 kHz. I tried to find a bandpass filter, or a high-pass and a...
  3. R

    Finding a point on a line closest to a point in space

    Thank you so much! Yeah, makes so much sense now! Simply by remembering to infer that H is the closest point on the line to A got me going. Thanks again!
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    What have you learned from reading threads on this forum?

    Hi, glad to finally join the forum, I've been reading so many threads for about a year now! Thank you!
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    Finding a point on a line closest to a point in space

    Homework Statement Let \Delta be a line and A a point in space. [itex ] B [/itex] is a point on \Delta ans H is a point on \Delta such that \newcommand{\vect}[1]{\vec{#1}} \vec{AH} \perp \Delta . a) Show that \| \vec{AH} \| \leq \| \vec{AB} \| (a geometric reasoning should be used)...