You already know how to make sulfuric acid with the metabisulfite and oxidizer method and you saw how to make copper sulfate from copper and sulfuric acid, so now try making sulfuric acid with these two in mind… with sulfuric acid by electrolysis of copper using an inert anode.
Watch this tutorial to learn how to build up tones with cross hatching when drawing. Make sure to pause the video after each step and look at the screen every few seconds while you are drawing.
Need a new iPhone app? Check out Comets and Craters, a new iPhone tower defense strategy game. These ten video tutorials cover all of the gameplay troubles you may have. Steve explains the features and gameplay to help you get the most out of playing Comets and Craters on your Apple iPhone. For those more seasoned Tower Defense players, the video's also provide some insight regarding scoring, upgrades, plus Tower and Enemy capabilities.
Michelle Phan presents this tutorial on how to take a tomato and turn it into an invigorating scrub.
Check out this informative video tutorial from Apple on how to do more with the Sidebar in the Mac OS X Finder. Learn about the Sidebar devices, the Sidebar shared, the Sidebar places, and the Sidebar search for. Mac OS X. It's what makes a Mac a Mac.
Check out this informative video tutorial from Apple on how to use the basics of the Mac OS X Finder. Learn about the Finder basics, the Sidebar, view buttons, and Quick Look. Mac OS X. It's what makes a Mac a Mac.
Welcome to a tennis lesson from FuzzyYellowBalls, the the best place to learn how to play tennis online. Our free video tennis lessons teach you how to play the game in a new way that combines technical analysis, visual learning, and step-by-step progressions.
Master your tennis kick serve progressions. This tennis lesson video series lays out the 4 steps to tennis kick serve progressions. Be sure to click on all the video chapters to view the entire tutorial.
The ready position is the position you want to be in when you're waiting for your opponent to hit you the tennis ball. It's the foundation for tennis movement in general. From this position you can employ the various footwork patterns that let you move around the tennis court correctly. The ready position is very similar to an athletic stance in basketball. Your feet are a little bit wider than shoulder-width apart, your knees are slightly bent and the weight should be on the balls of your feet.
Footwork is probably the most important part of tennis. Unfortunately, it is also one of the most underrated areas of the sport. Learning to move around the tennis court correctly is EXTREMELY important. Correct footwork lets you use correct stroke mechanics when you hit. Correct footwork is what typically sets advanced tennis players apart from everyone else.
Bringing your back foot up after you hit the tennis ball puts you in position to recover back to the middle of the tennis court. The key, as we explain in this video, is to get your body facing the net after you hit (similar to the ready position). This will let you side shuffle back to the middle of the tennis court.
The fourth thing that every high-level tennis player does when hitting a backhand is follow through. Extend out in the direction you are hitting the ball, then smoothly bend the elbows and wrap the racket up over your shoulder.
This video explains how the amount of shoulder rotation you get during a windshield wiper forehand can differ from a classic forehand. After you hit the tennis ball, you typically have to rotate a little bit more than you otherwise would on the windshield wiper. There are a number of reasons for this, but in this video we keep our focus relatively narrow.
Every time you hit a tennis forehand you choose how you position your feet -- what stance you will use. You can hit a forehand with an open, neutral, or closed stance, but you should stay away from the closed stance if possible. This last stance makes it difficult to rotate your upper body through contact, making it difficult for you to use correct forehand mechanics.
All you science and astronomy nuts out there, pay attention, this detailed video tutorial series will tell you everything you need to know about using the Meade AZ Series Telescope to ogle the universe.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 10, Lesson 3 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to your health, being sick, and visiting a doctor or hospital clinic.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 11, Lesson 1 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to meeting your friends in public.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 10, Lesson 2 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to being sick and conversing with a doctor.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 8, Lesson 1 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn how to have a conversation with someone about their upcoming and previous travels.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 7, Lesson 3 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to inviting your friends out.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 8, Lesson 2 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn travel related words in Russian.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 10, Lesson 4 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to your health with a doctor.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 8, Lesson 3 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to visiting another city when traveling by train.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 9, Lesson 2 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn Russian phrases when checking into a hotel.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 9 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to hotels.
Check out this instructional Russian language video to learn Russian as Russians speak it. This is Theme 10 in the series. Practice your Russian listening skills by listening to the dialogue presented in this language video. Learn words related to doctor and pharmacy.
Learn how to do speed tube shoulder presses. Presented by Real Jock Gay Fitness Health & Life. Benefits
Learn how to do dumbbell step-up with shoulder press. Presented by Real Jock Gay Fitness Health & Life.
Build a mineral oil computer aquarium. It cools the system while giving you something to look at.
Kyran Dale shows how wxPython provides an easy way to bind user-generated events, such as choosing a menu option, to methods provided to handle them. The procedure shown is typical of all wxPython event handling so with little effort can be extended to far more complicated projects.
The fight to wrest control of apps from Apple's revenue-focused grip just took a major turn in favor of Epic Games.
As necessary as sleep is, millions of people struggle with it every night. More than 50 million Americans suffer from any number of sleep disorders. If you're one of them and want a more satisfying, consistent sleep, then the LectroSound Sleep & Relax Soothing Noise Machine may be the perfect addition to your bedroom. For only $15.99, you can give yourself the rest and reinvigoration that your body and mind crave.
Even for those of us who enjoy spending time alone at home, at a certain point, it just gets boring. We all need social interaction, but with stay-at-home orders, that can be hard to come by. If you're feeling the itch to hang out with friends and have a good time, you should know there are plenty of free multiplayer games for iPhone and Android that will let you do just that — remotely.
One of the scariest things about the COVID-19 virus is that you can show no symptoms but still be infected (and contagious). Naturally, we all want to know whether we're carrying the new coronavirus, but if you're showing signs of COVID-19, how can you be tested to know for sure? Websites are popping up to help with that, screening for symptoms, and directing you to a testing site if needed.
When filtered through the prism of the top stories of the year, the business of augmented reality 2019 was defined as much by epic failures of AR startups as it was by the promising developments that propelled the industry forward into 2020.
Indian startup Dimension NXG is launching augmented reality headsets into India's consumer market with a bold idea: focusing on immersive computing in education on the high-end. The plan is to give a new kind of AR headset to schoolchildren in remote Indian villages, starting from class 5 (age 10) until graduation.
In recent years, unwanted calls have become a top priority for the FCC. In 2016, analysts estimated that US customers received over 2.4 billion robocalls per month. As a result, the FCC has provided carriers new tools to combat this problem.
If you're a Game of Thrones fan and would like to watch the latest season offline on your iPhone, or if you need to catch up on previous seasons, there is no current support on HBO Go or HBO Now to download episodes for offline viewing. But that's only halfway true because there is a legal, official way to download HBO content on your iPhone, it's just not obvious at all.
You don't have to be a frequent flyer to know how indispensable navigation apps have become. Many of us rely on these apps for traveling from state to state and getting around in foreign cities, but even more of us count on these apps to beat rush hour traffic and find the quickest routes to school or work. So naturally, we all have our favorite mapping apps, but which one is truly the best?
NetBIOS is a service that allows for communication over a network and is often used to join a domain and legacy applications. It is an older technology but still used in some environments today. Since it is an unsecured protocol, it can often be a good starting point when attacking a network. Scanning for NetBIOS shares with NBTScan and the Nmap Scripting Engine is a good way to begin.
