Buoyancy: What Goes Up Must Come Down to Density
A hot-air-balloon ride is a magical experience, but it works because of the same principle that makes ice float. Strap in as Groupon explores the basics of buoyancy.
The Greek philosopher Archimedes is famous for coining the term, "Eureka!" in his bathtub when he noticed that the water level rose as he lowered himself in. Among his other revelations, Archimedes discovered the following principle: an object immersed in a fluid experiences an upward force equal to the weight of the liquid it displaces. This concept is known as buoyancy, and it explains why, for example, an ice cube floats in a glass of water. Ice is less dense than water, but it still displaces the same volume of water as its own volume (another Archimedes principle). Thanks to buoyancy, the upward force is equal to the weight of the displaced water, not the ice, and the lighter cube ends up floating.
The same principle explains why a massive hot-air balloon floats as effortlessly as an astronaut evading his chores. As the air inside the balloon is heated, it expands and becomes less dense—each cubic foot of 300-degree air, for instance, weighs about half an ounce less than the same volume of colder air. According to Archimedes, the object (balloon) immersed in a gas (the sky) experiences an upward force equal to the weight of the gas it displaces (the outside air). So as long as the lift generated by the hot air is greater than the balloon, its basket, and its passengers combined, it lifts off into the sky. To bring the vessel back to earth, the pilot simply lets the hot air escape through a vent, increasing the density of the air inside and tipping buoyancy's scales back toward gravity.
With acute awareness of the physical, aesthetic, and energetic changes that accompany aging, the staff of EC Medical Group aims to reunite clients with their younger selves. HCG injections work in tandem with low-calorie diets custom-built for each client, helping to dissolve weight gained from slowed metabolism. Medical aesthetic treatments employ modern technologies that range from microdermabrasion and dermal fillers to lasers that diminish age spots and glide over hickeys without judgment. EC's trained technicians address internal fluctuations as well, performing extensive medical consultations in order to design regimens of natural hormone-replacement therapy.
Emily's Medical Spa specializes in aesthetic services backed up by state-of-the-art medical technology. Accordingly, the med spa is led by Dr. Nejat Jalisi, a family physician, and Saija Hamidi, a registered nurse. Together with their staff, they target cosmetic concerns such as fine lines, sagging skin, sun damage, acne, cellulite, and unwanted body hair. For instance, injectables such as Botox and Juvéderm mitigate signs of aging. Aesthetic devices employ lasers, therapeutic heat energy, and intense pulsed light to accomplish such tasks as hair removal, skin tightening, and body contouring.
At Katie Eyelash Extensions, located within Le Prince Salon, an aesthetician draws on years of beauty-industry experience to keep clients groomed and styled from eyebrows to toes. She decorates fingernails and toenails during mani-pedis, waxes away unwanted body hair, and lengthens eyelashes with extensions that last up to four weeks. For a flirtatious curl, opt for the eyelash perming treatment.
What services does your business offer and what makes your business stand out from the competition?
Free consultation and evaluation by professional healthcare provider tailoring to your needs of losing weight effectively and safely. Whether your goal is to lose 5 or 50 pounds, we can effectively help you.
What was the inspiration to start or run this business?
After the birth of my son, I gained over 60 pounds. Through dieting and exercising for six months, I could not shed the last 30 pounds until I stumbled on this weight loss program. With diet, exercise, and this weight loss program, I regained my pre-baby body. I truly believe in this program's effectiveness.
What do you love most about your job?
Seeing how happy the clients are after losing approximately 3 to 4 pounds each week.
What is the best reaction you've ever gotten from a customer?
"Oh my gosh, thank you for helping me to fit into my old jeans again!"
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