How To : Demonstrate cooling by evaporation
A lab exercise that demonstrates how evaporation of water lowers the temperature. Also, how surface area affects the rate of evaporation.
A lab exercise that demonstrates how evaporation of water lowers the temperature. Also, how surface area affects the rate of evaporation.
If you drop your smartphone in water, take it apart as much as you can and place it in rice. It's been the most recommended method of cell phone rescue since the days of clamshells. In fact, it's usually the only thing recommended when searching for "how to save your wet phone ...more
Whether you like to go swimming or jump in a hot shower with your Apple Watch on, the chance is pretty high that you'll get water inside its speaker. If you're a big runner, even sweat can get inside there. While there is no way to prevent water from getting inside your Apple ...more
Foodies and big-time chefs like Thomas Keller go crazy for fleur de sel. This finishing salt appears in fancy eateries and cookbooks the world over, and in the early 2000s, it was not uncommon to see diners in a high-end restaurant sprinkle a pinch of fleur de sel on their pla ...more
Letting wine "breathe" isn't just something that happens in restaurants in '80s teen comedies with snooty maître d's. It's really a thing, and you should learn how to do it at home, because it'll make just about any wine—including Two-Buck Chuck—taste much, much better. It's a ...more
Simmering or poaching food is a total pain sometimes. The problems are numerous: a layer exposed to air often dries out and creates a gross skin that can ruin the texture of the sauce, the poaching liquid evaporates too quickly and causes the poached protein to burn, and so on ...more
We have no control on the weather yet it is a part of our lives which influence what we do, what we eat, what we wear and many times where we live. How did people predict the weather before there was the Internet, television, radio or the weatherperson with all of their gadget ...more
RFID cards are becoming a fairly common way to purchase goods, but they're already widely used to pay fares on buses, trains, subways, and trolleys across various cities. TAP cards are quick and reliable, but it can be a real pain to remember to bring them with you, especially ...more
If a solar-powered air conditioner that requires no electricity or moving parts sounds to good to be true, well, then you're not as ambitious as this clever high school student. Instructables user Fozzy13 put together an awesome DIY tutorial on how he built his own air conditi ...more
Build your very own solar water distiller to discover how nature filters water via the sun and evaporation. The correct term for this is distillation.
Rust protection doesn't have to cost a fortune. With a little zinc and some electricity, you can protect your precious metals from rust by galvanization. When you galvanize something, you're giving it a protective coating, and in this case, it's a zinc coating. Watch this sci ...more
The sweet aroma of cooked fruit filling your kitchen is one of the trademark scents of summer. Yet attaining the perfect consistency for homemade jam can be difficult to master. Often it ends up a watery mess or over-solidifies into thick mystery goo that is destined for the t ...more
Turn a used toilet paper roll into a fantastical garden of colorful salt crystals! Creator Jim, AKA HvySteel, is part artist, part scientist. His HowTo brings back great memories of our youth. To get such ornate sculptures, proper chemical reactions must take place. 'The crys ...more
The Toyota 4Runner has a manual fuel filler door. To gain access the gas cap open the door. When open the gas cap, turn it counter clockwise slowly. Then pause a few second before remove the cap. You can hang the cap on the back of filler door. The video also advises that Toyo ...more
Break out the office supplies and kitchen utensils, because improving your morning makeup routine is about to get a lot easier. Some of the things you have lying around the house can provide the perfect solution for some of the most common beauty problems. We've collected 10 o ...more
Dr. Diana Wehrell-Grabowski provides a brief overview of Buckminister "Bucky" Fuller's accomplishments in this video tutorial. The emphasis is placed on Fuller's use of geometry in his inventions and his observations of patterns in nature (geometry). Dr. Diana demonstrates ho ...more
In this tutorial, we learn how to simulate teleportation w/ film effects & camera tricks. First, take a shot of your actors moving and doing something active. Then, take a shot of the frame without the actors. After this, go frame by frame masking the actors out of each of the ...more
Tim Carter demonstrates a few simple tricks when using paint rollers. Tim Carter also talks about putting the right amount of paint on a wall surface. These interior painting techniques will help with that professional finish. To get professional painting results, before you ...more
Preparation When creating a new lawn it is essential that the soil is prepared properly to ensure a satisfactory outcome when laying turf or sowing lawn seed. Whether you decide to lay turf or seed, the preparation is the same. This video shows how to prepare the soil ready f ...more
This video shows you how to feed and mulch your roses properly. Choose a fertilizer that is labeled as being especially for roses. It will have the right balance of nitrogen for top growth, phosphorus, which stimulates the bloom, and potassium for root development. Video cove ...more
Regardless of where you are, there will probably be a period when your lawn will turn brown and possibly go dormant when there is a drought. Contrary to popular belief, it is okay to use fertilizer on your lawn when there is a drought. Using a higher setting on your lawnmower ...more
It is important to use mulch in your garden if you wish to slow the evaporation of water and keep your soil moist longer. Mulch looks nice and is helpful to put around newly planted plants. four to six inches of mulch will allow you to water your plants less. According to Jul ...more
Watering requirements for deciduous trees is dramatically different in autumn than at other seasons throughout the year. In the autumn there is less wind, less evaporation, the temperatures are lower and so there is less of a problem with dehydrating the plant. When you plant ...more
What happens when you toss boiling water into the -30 degrees celsius, bitter cold Canadian air? Instantaneous "fog" (AKA a big vapor cloud of awesomeness).