What hides this stereogram?
[3662] What hides this stereogram? - Stereogram - 3D Image - #brainteasers #stereogram #3Dimage
BRAIN TEASERS

What hides this stereogram?

Stereogram - 3D Image
#brainteasers #stereogram #3Dimage
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Three Vampires Go To A Bar

Three vampires walk into a bar and sit down at a table. The waitress comes over and asks the first vampire what he would like. The first vampire responds, "I vould like some blood."
The waitress turns to the second vampire and asks what he would like. The vampire responds, "I vould like some blood."
The waitress turns to the third vampire and asks what he would like. The vampire responds, "I vould like some plasma."
The waitress looks up and says, "Let me see if I have this order correct. You want two bloods and a blood light?"
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Ultrasonic alarm

In 1953, the first U.S. patent for a burglar alarm operated by ultrasonic sound was issued to Samuel Bagno of New York City (No. 2,655,645) on a system for movement detection in a confined space by intruders or fire. It was manufactured as the Alertronic and first sold in Jun 1950. A sound source produced waves of 19,000 hertz, a frequency too high for normal human hearing. An intruder could be detected by the alarm by a difference in frequency of the reflected waves from the moving body (the Doppler effect). The device would then sound an alarm.
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