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

Blowing really does cool off your soup

Hot molecules are hopping around

Dear Mr. Alice: I was contemplating a hot bowl of soup the other day, eager to eat but reluctant to burn my tongue. So of course, I scooped up a spoonful, blew on it a few times, stuck it in my mouth, and swallowed. Does this silly ritual that we’ve all gone through a hundred times actually do anything to cool off the soup, coffee, whatever? Or is blowing on hot soup kind of like crossing your fingers for luck, an irresistible urge but ultimately ineffective? Does your cooler-than-soup breath lower the temperature? Or what? — Sharon, San Diego

Pucker up and blow, Sharon. It will work every time. Hot soup molecules are hopping around in the bowl. The hotter they are, the higher they rise, until they fly off the surface into a hovering vapor cloud. The soup cools slightly as the hottest molecules depart, but then the cooling stops when the microclimate over the bowl becomes saturated with vapor. Blow away the vapor, and the fresh air can take up a new round of hot molecules.

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

Previous article

Jazz the Night Away, Reopening Celebration at the Aquarium

Events July 11-July 15, 2020

Dear Mr. Alice: I was contemplating a hot bowl of soup the other day, eager to eat but reluctant to burn my tongue. So of course, I scooped up a spoonful, blew on it a few times, stuck it in my mouth, and swallowed. Does this silly ritual that we’ve all gone through a hundred times actually do anything to cool off the soup, coffee, whatever? Or is blowing on hot soup kind of like crossing your fingers for luck, an irresistible urge but ultimately ineffective? Does your cooler-than-soup breath lower the temperature? Or what? — Sharon, San Diego

Pucker up and blow, Sharon. It will work every time. Hot soup molecules are hopping around in the bowl. The hotter they are, the higher they rise, until they fly off the surface into a hovering vapor cloud. The soup cools slightly as the hottest molecules depart, but then the cooling stops when the microclimate over the bowl becomes saturated with vapor. Blow away the vapor, and the fresh air can take up a new round of hot molecules.

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

A poem for Independence Day by Francis Scott Key

His poem “Defence of Fort McHenry” became the lyrics to “The Star-Spangled Banner”
Next Article

Music follows nature – the Moldau, Central Asia's steppes, the Alps, the Appian Way , cliffs of Cornwall

We find Siegfried resting under a linden tree
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