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2014-04-22 Entomology (Study of Bugs) - Flying bug:

Jolena:    Thank you for including the image with your question.    The insect is a solitary wasp called a mason wasp, family Vespidae, subfamily Eumeninae, and probably Ancistrocerus for the genus

2014-04-21 Physics - force:

You have to multiply the force you use by the ratio of the diameters squared, because the force should be proportional to the cross sectional area.  You can just use weights, if you know them.  But to

2014-04-21 Entomology (Study of Bugs) - House Centipede?:

Deborah:    Thanks for including the image with your question.    This is *not* a house centipede, but a "stone centipede."  Here's more:    They can sometimes blunder

2014-04-21 Electronics - Car Door Electronic Swipe Card.:

This is not a new idea.  Several years ago it was common to have a pushbutton coded system where the car owner punched in a secret number by pressing the illuminated buttons on the drivers side door.

2014-04-21 Electrical Engineering - Car Door Electronic Swipe Card.:

No, I do not think the card swiper idea has merit.  Why?    ONE:  Because there are too many hacker tools that can open the door.  The hotel industry has become concerned because hotel rooms are being


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