Sensei

Thanks to science, so many people in the world are alive. Science is also the discovery of vaccines, drugs, artificial fertilizers, fast transportation. Without artificial fertilizers, the soil would not produce so many, such good quality fruits every year. Previous systems ( https://en.wikipedia.org/wiki/Three-field_system ) have reached their limits. Without fast transportation, fuel, fertilizers, ready food could not reach people who are hungry, creating a natural bottleneck. The next step, if the population continues to grow, will be the mass production of artificial food from GMO organisms. i.e. instead of raising animals on farms, human can make artificial meat in vats with specially created bacteria.. There will be no other option. Land space, hydrogen, oxygen, carbon, nitrogen on Earth have their limits.

It is an engine that uses liquid hydrogen and oxygen. To produce liquid hydrogen, human convert methane or use water electrolysis. To produce liquid oxygen, human cool the air to a temperature sufficient to liquefy the gases present, or use electrolysis of water and then cool it. Either way, it is a very energy-intensive process.

What for? How often does an airplane get hit by some kind of bullet (missile?), so it has to have this kind of protection.. ? Security for what type of aircraft? Civilian? Wartime ones? Air fighters have catapult to rescue pilot. A pilot's life is precious. His training takes years and costs millions. Nowadays, modern airplane-destroying missiles do not hit the body of the aircraft directly; instead, they explode close enough to the aircraft and create a cloud of shrapnel designed to cut thousands of small holes. One hole is enough to cause dehermetization and require the pilot to catapult out. shrapnel from the cloud can easily hit underslung missiles and underslung auxiliary fuel tanks and cause them to explode. A direct hit is not required. Active protection is used to protect important aircraft - if incoming missile is detected, it throws out a cloud of shrapnel to fool the missile and hit them rather than the aircraft. Modern turbojet engines suck in huge amounts of air to burn fuel. If any junk (shrapnel? debris?) gets into such an engine, it causes damage and the aircraft is no longer airworthy. In the case of a single-engine aircraft, it ends up catapulting the pilot.

Obviously, Coca-Cola.

Did you see the video? I saw them walking there..

..try to beat the chess algorithm..

You came up with Chicxelub, not the OP. OP asked about breaking asteroid. I just extended it to any space object and pointed out that comets can have much higher velocity. A metallic asteroid with mass m1 and velocity relative to Earth v1 = 20 km/s has kinetic energy: [math]\frac{1}{2} m_1 v_1^2[/math] An ice comet with mass m2 = m1 / 8.6 (the difference between the density of iron and the density of ice) = 0.116 m1, and v2 = 70.56 km/s has kinetic energy: [math]\frac{1}{2} m_2 v_2^2[/math] The overall difference between them: [math]\frac{\frac{1}{2} m_2 v_2^2}{\frac{1}{2} m_1 v_1^2}=\frac{0.915}{7.874} (\frac{70.56}{20})^2=1.45[/math] (if they are the same size/volume)

The mass murder of millions of ants.. Didn't you just recently ask for a definition of evil? Now you say evil is cool..

The velocity of Halley's comet relative to Earth is one of the highest in the Solar System ~ 70.56 km/s. https://en.wikipedia.org/wiki/Halley's_Comet Twice a year the Earth passes through the remains of Halley's comet. In early May and late October. Comets are heated and evaporate as they fly past the Sun, which slightly alters their orbit and breaks them into smaller pieces.

Regex is simpler: [01]* (meaning an infinite number of zeros and ones, forming any binary number you need).

People are missing one important factor: when the asteroid disintegration will occur. The Earth, moving at ~30 km/s around the Sun, and a diameter of ~12742 km, moves away by its entire diameter in just ~ 7 minutes. In order for all the parts of a disintegrated asteroid to hit the Earth, the disintegration would have to occur in less than just a minutes before the final impact. Which is highly unlikely, if humanity makes any attempt. Most of the Earth's surface is ocean. Most asteroids and meteors that hit the Earth's surface end up in the sea. The impact of a large object in the ocean creates a high tsunami, and the energy is dissipated over a very large area, and coastal areas are most at risk.

You suggest he should resurrect old threads. No, thank you. This is not good and welcome behavior. We have enough such newbies who resurrect 10+ year old threads when no one who participated in them is on the forum anymore.

The next time this happens, open https://www.speedtest.net/ and take a screenshot. We will see how fast your Internet connection is. Are you using a VPN, HTTP proxy, Tor to bypass censorship? All of these significantly reduce your Internet speed. Asynchronous content loaded by AJAX/jQuery etc. has timeout option. If the content is not ready in time, the main HTML page will have missing parts. The solution is simple: wait and reload the page with the F5 or so.

Try a different web browser to see if there has been a change. If I click on here for example: https://www.scienceforums.net/forum/100-science-news/?do=add we can see that there is a delay (tens to hundreds of milliseconds) between the display of the static part of the page and the display of the correctly visible text area, which suggests that it is a dynamically created and/or asynchronously loaded element, i.e. in case of Internet problems (like slow upload/download speed), the asynchronous content is not loaded fast enough before the timeout occurs, hence its absence.

Every history book is full of violence. The Jews and Palestinians recently added another chapter to their book.

Why? It's stupid. The first thing Telegram does when you try it is ask you for your phone number and then send you a message to verify that it is your number! Only an idiot can claim that this is a safe, reliable and anti-spy method of communication.. I would rather use this forum than the Telegram app for secret and secure communication..

The proper procedure is on Wikipedia https://en.wikipedia.org/wiki/Ipconfig "An important additional feature of ipconfig is to force refreshing of the DHCP IP address of the host computer to request a different IP address. This is done using two commands in sequence. First, ipconfig /release is executed to force the client to immediately give up its lease by sending the server a DHCP release notification which updates the server's status information and marks the old client's IP address as "available". Then, the command ipconfig /renew is executed to request a new IP address.[3][4] Where a computer is connected to a cable or DSL modem, it may have to be plugged directly into the modem network port to bypass the router, before using ipconfig /release and turning off the power for a period of time, to ensure that the old IP address is taken by another computer.[5]"

If you use Tor, the IP address of the Tor server will be displayed by showmyip.com, etc. If you use HTTP proxy, SOCKS4/5 proxy, the IP address of the proxy server will be displayed by showmyip.com etc. If you use VPN, the IP address of the VPN server will be displayed by showmyip.com etc. If someone hacked into your computer and passed the transmission through their computer (to intercept and change TCP/IP/UDP packets), you won't see the correct IP address..

IP address can be public or private. IP address can be static or dynamic. So we have four combinations: public static, public dynamic, private static, private dynamic. IP address can be in version v4, or in version v6. IPv4 is four decimal numbers separated by dots. IPv6 is many hexadecimal numbers separated by a colon. Be careful with these. They can encode a MAC address of a real machine, which can uniquely identify a person worldwide. A home computer with a WiFi card or a smartphone/tablet connected to home WiFi router with plugged modem, most likely has a private dynamic IP address assigned by DHCP. This will most likely be 192.168.0.x, where x is from 2 to 254 (because 0 and 255 are special purpose, and 1 is usually router). or 192.168.y.x (y=0...255). If you use Android smartphone as hotspot, your IP will be something like 192.168.43.100 or so. https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol If you connect the modem directly to your computer and your ISP is cool, you may have a public static IP address or at least a public dynamic IP address. Doubtful. Nowadays ISPs are screwing people over and such options are only for enterprises for more $$$.. You can check your IP addresses (yes, addresses! You can and will have multiple IP addresses!) by Start > cmd.exe and then ipconfig /all (on Windows), or ifconfig (on Linux). A typical computer (whether or not desktop or laptop) has at least 6 private IP addresses. 127.0.0.1 (IPv4 localhost) ::1 (IPv6 localhost), 192.168.x.y (IPv4 ethernet card) some IPv6 for ethernet card, 192.168.x.y (IPv4 wifi card) and some IPv6 WiFi card. If you will plug more modems or external WiFi USB, you will have more.. What showmyip.com etc. shows is IP address of your router/modem, or even your ISP IP address. Multiple people can have it. Once you have it, paste it here https://ipinfo.io/ to learn what is ASN. IP address with a slash like /16 means 16 bits are zeroes in the mask i.e. mask is 255.255.0.0. /8 means mask is 255.0.0.0 etc. If you have public static IP address, you can go to router configuration (typically in a web-browser open http://192.168.0.1 (no SSL!!! manually edit if needed) ) and configure port forwarding to your real machine. Install XAMPP on your desktop/laptop, configure port 80/443 forwarding to your private static IP (disable DHCP/configure DHCP to make your IP private static), and ask a friend (or use smartphone with LTE/5G) to visit your web server. https://www.apachefriends.org/pl/index.html (This way you can share things with other people/friends/family, with a higher level of security than sending them via email or to the cloud.. which is one of the most stupid things people can do. Sextels of Hollywood actresses came from the cloud. Their cloud) They want your money to make it static (so you'll have less trouble installing some server at home). Hundred or thousands of people share the same IPv4 address at the same time.. There is only 2^32 = 4.3 bln IPv4 addresses. Some not assigned, reserved, special purpose.. People have a couple smartphones, a couple computers, a couple of tablets, a couple of laptops etc. Every IoT device (e.g. camera, payment terminal) can have a separate SIM card.. Owners want/need to have their IPv6 address to connect them. IPv4 was exhausted in 2011. https://en.wikipedia.org/wiki/IPv4_address_exhaustion Run this command in a loop in a script: wget -q -O- http://ipecho.net/plain With some delay, such as 15, 30, 60 minutes after each check. If they are really using a home WiFi router (and then, f.e. fiber cable), they should have the same IP address (as reported by showmyip.com, etc.) as all other devices using the same Internet connection (as long as you check things within a couple minutes, not hours or days). You need to check this. Once you see the IP, check each one individually in ipinfo.io ) The MAC address (BTW, it has nothing to do with Macintosh) is on the Ethernet card or WiFi card. Each of them is different. So you can have many different MAC addresses.. as many as network interfaces.. The arp command is used to display the MAC addresses of other machines on the LAN. Your machine is not included. On the Linux you do first e.g. nmap 192.168.0.0/24 and then arp. Otherwise some devices may be missing (and they will be if they have disabled ICMP)

One look at them, what they do, what they say, what they think, what they believe, to know that they are not Christians.. On Donald's election rallies we just see promotion of hate, love for guns, petrol industry, white supremacy supporters, neonazis, fascists, nationalists, complacent, ignorants.. The purpose of this thread is to offend and/or discredit true Christians? Being in church every Sunday and holiday does not make someone a Christian (the same goes for Muslims or Jews with their own holiday dates). I would say that it is exactly the opposite. People show their religiosity for the sake of others, for publicity, so that they may be regarded as such. More than once I have seen and heard old ladies going to church every day at 6:30 in the morning and their conversations were just gossiping about their neighbors and friends. Not a single worthwhile things worth saying with their mouths. Add to this preachers who have a distorted view of reality, and themselves incite to hatred, injustice, and encourage meanness, and that's total pathology.. Such are found on all sides of the barricade, both among Jews, Muslims and Christians.

I think it happened much earlier, in 1978..

We are glad that at least in the subject of defense of this planet we share common views..

The best are plasticine and polymer clay, thermosetting clay. You can make any toy out of them.

Photons absorbed by matter increase internal energy, i.e. body temperature. It is possible to indirectly detect light by studying the increase in body temperature.

The temperature rise (e.g. absorption of light) can be stored by an electronic device for later use on a memory card, etc. It does not need to be read by a human. It can be analyzed by a computer and autonomously perform certain actions. It does not have to be electronic. A bimetal can cut off the gas supply when too high a level is reached (used in gas water heating).