Quantcast
4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs

Road Testing Your Alibi

Hey, Matt:

Which is a tighter seal, "air tight" or "water tight"?

-- Bay Park Jay

Even the elves -- not always tuned to the usual human-being wavelength -- were a little perplexed by this one. All they could figure was that you're building an alibi. So, let's say you make your alibi out of a bag full of the usual hot air sealed to keep water out and air in. The internal pressure of the thing is normal sea level, 14.7 pounds psi. Now take your alibi to Windansea and force it under water 33 feet and you've doubled the outside pressure (to 29.4 pounds psi) and your alibi is looking sucked-up and flimsy as the inside air is compressed. At 66 feet your incredible shrinking alibi is fighting three atmospheres. Too many variables to be able to predict if it will survive under that pressure, but our guess is you'll be whimpering like a baby and begging for forgiveness at that point.

If we hop in the car and take our alibi to Denver, a mile above sea level, the outside air pressure is about 93% of San Diego's and our alibi is looking a little puffier than it did at home. At an altitude of 10 miles, 90% of sea-level pressure, it's pooching out more; but we'd have to go, oh, maybe 18,000 miles up before the alibi's inner air pressure is twice the outer air pressure. At some point, our alibi will go high enough to literally blow up. But from the elves' incredibly precise scientific calculations here, it's obvious you'd better concentrate on water tightness if you expect to get away with anything.

Here's something you might be interested in.
Submit a free classified
or view all

Previous article

Faulconer's politics of carotid restraint

Termed-out mayor, seeking political future, ends chokeholds
Next Article

The Kabbs: lost and found

Stifled by the pandemic, new self-titled album is released
Comments
0

Be the first to leave a comment.

Sign in to comment

Sign in

Hey, Matt:

Which is a tighter seal, "air tight" or "water tight"?

-- Bay Park Jay

Even the elves -- not always tuned to the usual human-being wavelength -- were a little perplexed by this one. All they could figure was that you're building an alibi. So, let's say you make your alibi out of a bag full of the usual hot air sealed to keep water out and air in. The internal pressure of the thing is normal sea level, 14.7 pounds psi. Now take your alibi to Windansea and force it under water 33 feet and you've doubled the outside pressure (to 29.4 pounds psi) and your alibi is looking sucked-up and flimsy as the inside air is compressed. At 66 feet your incredible shrinking alibi is fighting three atmospheres. Too many variables to be able to predict if it will survive under that pressure, but our guess is you'll be whimpering like a baby and begging for forgiveness at that point.

If we hop in the car and take our alibi to Denver, a mile above sea level, the outside air pressure is about 93% of San Diego's and our alibi is looking a little puffier than it did at home. At an altitude of 10 miles, 90% of sea-level pressure, it's pooching out more; but we'd have to go, oh, maybe 18,000 miles up before the alibi's inner air pressure is twice the outer air pressure. At some point, our alibi will go high enough to literally blow up. But from the elves' incredibly precise scientific calculations here, it's obvious you'd better concentrate on water tightness if you expect to get away with anything.

Sponsored
Here's something you might be interested in.
Submit a free classified
or view all
Previous article

Penasquitos Lutheran Church: the good news on Earth

Mantra: Connecting people to Jesus and one another
Next Article

The Kabbs: lost and found

Stifled by the pandemic, new self-titled album is released
Comments
0

Be the first to leave a comment.

Sign in to comment

Sign in

Art Reviews — W.S. Di Piero's eye on exhibits Ask a Hipster — Advice you didn't know you needed Best Buys — San Diego shopping Big Screen — Movie commentary Blurt — Music's inside track Booze News — San Diego spirits City Lights — News and politics Classical Music — Immortal beauty Classifieds — Free and easy Cover Stories — Front-page features Excerpts — Literary and spiritual excerpts Famous Former Neighbors — Next-door celebs Feast! — Food & drink reviews Feature Stories — Local news & stories From the Archives — Spotlight on the past Golden Dreams — Talk of the town Here's the Deal — Chad Deal's watering holes Just Announced — The scoop on shows Letters — Our inbox [email protected] — Local movie buffs share favorites Movie Reviews — Our critics' picks and pans Musician Interviews — Up close with local artists Neighborhood News from Stringers — Hyperlocal news News Ticker — News & politics Obermeyer — San Diego politics illustrated Of Note — Concert picks Out & About — What's Happening Overheard in San Diego — Eavesdropping illustrated Poetry — The old and the new Pour Over — Grab a cup Reader Travel — Travel section built by travelers Reading — The hunt for intellectuals Roam-O-Rama — SoCal's best hiking/biking trails San Diego Beer News — Inside San Diego suds SD on the QT — Almost factual news Set 'em Up Joe — Bartenders' drink recipes Sheep and Goats — Places of worship Special Issues — The best of Sports — Athletics without gush Street Style — San Diego streets have style Suit Up — Fashion tips for dudes Theater Reviews — Local productions Theater antireviews — Narrow your search Tin Fork — Silver spoon alternative Under the Radar — Matt Potter's undercover work Unforgettable — Long-ago San Diego Unreal Estate — San Diego's priciest pads Waterfront — All things ocean Your Week — Daily event picks
4S Ranch Allied Gardens Alpine Baja Balboa Park Bankers Hill Barrio Logan Bay Ho Bay Park Black Mountain Ranch Blossom Valley Bonita Bonsall Borrego Springs Boulevard Campo Cardiff-by-the-Sea Carlsbad Carmel Mountain Carmel Valley Chollas View Chula Vista City College City Heights Clairemont College Area Coronado CSU San Marcos Cuyamaca College Del Cerro Del Mar Descanso Downtown San Diego Eastlake East Village El Cajon Emerald Hills Encanto Encinitas Escondido Fallbrook Fletcher Hills Golden Hill Grant Hill Grantville Grossmont College Guatay Harbor Island Hillcrest Imperial Beach Imperial Valley Jacumba Jamacha-Lomita Jamul Julian Kearny Mesa Kensington La Jolla Lakeside La Mesa Lemon Grove Leucadia Liberty Station Lincoln Acres Lincoln Park Linda Vista Little Italy Logan Heights Mesa College Midway District MiraCosta College Miramar Miramar College Mira Mesa Mission Beach Mission Hills Mission Valley Mountain View Mount Hope Mount Laguna National City Nestor Normal Heights North Park Oak Park Ocean Beach Oceanside Old Town Otay Mesa Pacific Beach Pala Palomar College Palomar Mountain Paradise Hills Pauma Valley Pine Valley Point Loma Point Loma Nazarene Potrero Poway Rainbow Ramona Rancho Bernardo Rancho Penasquitos Rancho San Diego Rancho Santa Fe Rolando San Carlos San Marcos San Onofre Santa Ysabel Santee San Ysidro Scripps Ranch SDSU Serra Mesa Shelltown Shelter Island Sherman Heights Skyline Solana Beach Sorrento Valley Southcrest South Park Southwestern College Spring Valley Stockton Talmadge Temecula Tierrasanta Tijuana UCSD University City University Heights USD Valencia Park Valley Center Vista Warner Springs
Close