300,000 pencils. Cedar wood is commonly used to make pencils. The best trees are around 14-years-old since they’re mature enough to be cut down. 1 tree can make up to 300,000 pencils. How many pencils does the average tree make? … Continue reading →

Use a Workable Fixative like Krylon. “Workable” means you can add layers of graphite over the drawing after it has been sprayed. Once a drawing has been sprayed, the graphite underneath will NOT erase. It is FIXED! How do you … Continue reading →

Synthetic diamond scalpel blades are commercially available and well liked by surgeons. Contrary to what you might think they stay sharp much better than steel and chipping doesnt seem to be a problem. Quoted sharpness is 3 nm and achieved … Continue reading →

Do you need a power supply for pedals? It’s important to have the right pedal power supply to ensure your pedals give you sound when plugged in and won’t fail you when playing live. Do guitar pedals come with power … Continue reading →

Want Stronger, Healthier Hair? Try These 10 Tips Turn down the heat. Take vitamins. Use less shampoo. Massage your scalp. Eat more protein. Make an egg yolk mask. Use a cool rinse. Apply aloe. Why is my hair roots so … Continue reading →

In the case of a human hair, 200 megapascals is 20,000,000 kilograms of force per square meter of human hair. Those are some big numbers. They mean that a single strand of hair is about half as strong as a … Continue reading →

Hair is strong. A single strand could hold 100g (3oz) in weight: the combined hair of a whole head could support 12 tonnes, or the weight of two elephants. Weight for weight, it is not as strong as steel: more … Continue reading →

This one has come up a lot recently on the Arduino subreddit and Electronics stackexchange – can I power my Arduino with a 9V battery? The quick answer is yes, you can. Can Arduino Uno output 9V? Yes. Just take … Continue reading →

Pure gypsum is a white rock but sometimes impurities colour it grey, brown or pink. Its scientific name is calcium sulphate dihydrate and its chemical formula is CaSO42H2O. This means that, for every molecule of gypsum, there are two molecules … Continue reading →

Even in its pure form, titanium is harder than many steel forms. As a refractory metal, it is highly resistant to heat and abrasion which is why titanium and its alloys are popular . It can be alloyed with iron … Continue reading →

The earth is literally getting greener. Today, there is five percent more foliage than twenty years ago, and it is primarily ambitious tree planting projects and intensive agriculture, mainly in China and India, that are behind the increase. This is … Continue reading →

Graphene Oxide–Rare Earth Metal–Organic Framework Composites for the Selective Isolation of Hemoglobin | ACS Applied Materials & Interfaces. Can graphene replace rare earth metals? New research shows that there are potential technology-based solutions that can replace many of the metals … Continue reading →

Overcharging a battery causes excessive gassing — the electrolyte gets hot and both hydrogen and oxygen gas are generated. On older vented batteries, the electrolyte could cook away, leaving the plates exposed and ruining them. On sealed batteries, the buildup … Continue reading →

Besides whether it has the power to actually cut the grass effectively, the big question with a battery-powered mower is how long it will last before needing to be recharged. Ryobi estimates the run time with the supplied batteries for … Continue reading →

Each section of the shield adds 25 health to your Legend, which is how much a shield cell will heal you. So, at the start of every battle royale game, all players will drop into the map with 150 health, … Continue reading →