Why are port holes round?

Why are port holes round?

If portholes were designed with angles, this stress would tend to concentrate at those points and perhaps crack the skin. With round portholes such stress is evenly distributed around the holes, making it less likely for such cracks to occur.

Where is Gobekli Tepe?

Göbekli Tepe (Turkish: [ɡøbe̞kli te̞pɛ], “Potbelly Hill”) is an archaeological site at the top of a mountain ridge in the Southeastern Anatolia Region of Turkey, approximately 6 km (4 mi) northeast of the town of Şanlıurfa.

What percentage of species have been discovered?

Even after centuries of effort, some 86 percent of Earth’s species have yet to be fully described, according to new study that predicts our planet is home to 8.7 million species.

What is the difference between salary and hourly?

Generally, the hourly-paid employees will earn wages at the rate of time and one-half for the hours in excess of 40 per week. The salaried employees in high pay positions are not likely to receive additional pay for the hours in excess of 40 per week. However, employees with low salaries are entitled to overtime pay.

How many brains does a leech have?

Finally, the last seven segments are fused to form the animal’s tail sucker, as well as its posterior brain. The leech also has 32 brains because a brain segment is located in each segmentation of the body.

What determines the pitch of the sound?

Since pitch is such a close proxy for frequency, it is almost entirely determined by how quickly the sound wave is making the air vibrate and has almost nothing to do with the intensity, or amplitude, of the wave.

How many gallons of water does an average household use per day?

If your family’s water usage is more than that amount, you need to look at your water-use habits. An average usage is 50 gallons/day/person. An average usage for a family of four for a 30-day billing period would be 6,000 gallons or 8 ccf. Teens tend to stay in the shower longer.

What percentage of Australia is desert?

Australia contains the largest desert region in the southern hemisphere and a high proportion (around 70%) of the continent is arid or semi-arid (map S1).