Another great telescope for kids is the Celestron. This company has been around since 1960 and is one of the most popular brands in the world. The Celestron telescopes are known for their quality optics and easy-to-use designs. The company offers a wide range of models, so you can find ...
If electrical energy costs 0.074 dollars per kWh, how much money is spent every day in keeping the TVs turned on? Suppose you have a 550 W toaster. P = 550 W, cost = 8 cents/kWh. 1. How much electrical energy in J is needed to make a sli...
"Professor Niklas Mörner, who has been studying sea level for a third of a century, says it is physically impossible for sea level to rise at much above its present rate, and he expects 4-8 inches of sea level rise this century, if anything rather below the rate of increase in the...
When building a staircase, there are two critical measurements to consider. They are the run and the rise. The run is the width of the stair tread. Someone with big feet will want a tread with a wider run. The rise is how high each step is from the next. Typically, a stair t...
Foldable bike tires: Instead of what is found on most tires—a wire bead (the edge of the tire that holds the tire onto the rim)—these tires often have a Kevlar®bead. A big reason to get a foldable tire is to save weight. Because it can be folded up, storing and carrying the...
Most telephoto lenses on traditional DSLR or mirrorless cameras are big, often 6 to 12 inches long. The idea thatApple has managed to do this in a phonethat's 0.35mm thick is almost incomprehensible. The light just doesn't have room to pull in the image. And yet, that'...
The bonus here is that big tires, with their additional air volume, almost feel like an inch of travel has been added to the bike. The main thing though, is the feeling of control and the hook up you’ll have in the loose rocky stuff. Our Enduro SL is almost ready to get rowdy. ...
Before creating the foundry and looking for a furnace, you need to decide how big the parts and metal objects you will cast will be in your home foundry. It is recommended that a novice user finds a vessel akin to a small sized, steel gas bottle or a small beer keg. With these, you...