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2017-03-26 Entomology (Study of Bugs) - What is this?:

Dear Rebecca - You needn't worry about this one - it is the detached abdomen of an insect in the order Hymenoptera, either a large ant or a small wasp. See for an image of an

2017-03-26 Physics - Finding voltage across a wire of unkown lengtg:

I don't help with homework problems.  It says so in my profile, right up front.  The answer is 16 volts.  Figure the current, figure the fraction of the voltage of these resistors in series, you get your

2017-03-26 Astronomy - Fair Market Value:

Hi James    Most amateur telescope makers choose to make reflecting telescopes, using mirrors rather than lenses.  The process is the same:  you grind the glass to shape using varying sizes of grit, then

2017-03-26 Astronomy - Fair Market Value:

Hi James    This is not an easy question to answer. You are correct, that there are few moving parts and little wear and tear on most telescopes--so you'd think they would have a high resale value.  But

2017-03-26 Physics - Wine Glass Acoustics:

Perhaps you should elaborate as to which equation.  There are many equations involved in acoustics with many constants.  This one is probably a damping constant, but I have absolutely no idea without the


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