fire_mat99

When it comes to understanding biology and finding cure it seems the 21st century we are going back in time. disease,AIDS, tuberculosis and malaria each kill over a million people annually. HIV remains without a cure or vaccine, and is growing rapidly in India and much of the African continent. Antibiotic resistance is a growing concern for organisms such as tuberculosis. Other diseases, such as SARS, ebola, and flu variations, are also causes for concern. The World Health Organization has warned of a possible coming flu pandemic resulting from bird flu mutations. World Health Organization deaths http://en.wikipedia.org/wiki/Big_killer By disease, conditions (Excluding abortion and euthanasia) Ischaemic heart disease 7,208,000 13% Cerebrovascular disease 5,509,000 10% Lower respiratory tract infection 3,884,000 7% HIV/AIDS 2,777,000 5% Chronic obstructive pulmonary disease 2,748,000 5% Perinatal conditions (low birthweight, birth asphyxia, birth trauma) 2,462,000 4% Diarrhoeal diseases 1,798,000 3% Tuberculosis 1,566,000 3% Malaria 1,272,000 2% Trachea/bronchus/lung cancers 1,243,000 2% Road traffic accidents 1,192,000 2% Childhood diseases (pertussis, polio, diphtheria, measles, tetanus) 1,124,000 2% Diabetes mellitus 988,000 2% Other unintentional injuries (besides road traffic accidents, poisoning, falls, fires, drowning) 923,000 2% Hypertensive heart disease 911,000 2% Self-inflicted injuries (suicide) 873,000 2% Stomach cancer 850,000 2% Cirrhosis of the liver 786,000 1% Nephritis/nephrosis 677,000 1% Colon/rectal cancer 622,000 1% Liver cancer 618,000 1% Violence 559,000 1% Breast cancer 477,000 1% Esophageal cancer 446,000 1% Inflammatory heart disease 404,000 1% Alzheimer and other dementias 397,000 1% Falls 392,000 1%

Going to the moon was too risking and astronauts know that doing the apollo program they may not come back.And even today space flight is very risking you may not come back. If they can't go to the moon or do earth orbits in a safe way you can't go to Mars.The technology we have today just is not safe for space flight.May be in 40 or 60 years from now the technology may make it safer but for now it is very risking going up in space. Has for the cost of the space shuttle or any rocket the rocket fuel is cheap or the material the rocket is made of.

There is much talk on the news with are energy problem and some talk about nuclear fusion or cold fusion is this where we use water not oil? So nuclear fusion or cold fusion use water or plasma not fossil fuel? And if nuclear fusion or cold fusion is a answer to are energy problem how long will it take to we have it 20 years or 30 years? And would there be H2O nuclear fusion cars in 20 years? This most be cutting edge technology?

Hi all I have some basic quations . 1 I read a report of news statation saying that space probes can never leave are solar seytem there are strange phononma that slows down anything tring to escape are solar seytem 2 What would happen if a comit came close to earth and affect the orbit of the earth and cause the earth to spin out of the orbit and spin out of are solar seytem in deep space and can NASA do anything to stop this or some how cause the earth to go back to its orbit 3.For aviation we use pellpeller ,jet egine and rockets in the future we may use Propulsion or antigravity how would this help aviation and NASA and are NASA working on any Propulsion or antigravity. Also can NASA make gravity or antigravity. And gravity is a gravitational wave

If you transmit 30MHz and up it will go in space and are called line of site But does gravitation of planets and black holes interfer with radio waves Also gases like this

my questions What makes the radio signal weaken on earth but not in space? Why can radio waves travel so far in space? What other strange phenomena is there in space that can stop or weaken a signal?

Here is copy of how radios work ..I still have some questions ---------- Trees and buildings affect radio waves as well as the weather. The sun can also affect radio waves; it can help the radio operator or cause problems. If the sun was gone the radio wave would still work. Why can a radio on the moon with a 5 inch antenna pick up NASA because NASA is transmitting at a very high power and using a very big antenna. How can NASA pick up radio transmissions coming from a portable radio on the moon using 3 watts; because NASA is using a big antenna and also a very good antenna. How can you transmit signals around the earth? Using HF signals bouncing off the ionosphere and keep bouncing so you can pick them up. Other signals are lying off site like VHF and UHF and are good for only short local transmissions but sometimes they can travel far. i.e 50 or 100 miles. How can you trace a radio signal? By pointing the receiver different directions it will give you a signal strength. Then you walk in the direction of the strongest signals you get closer to the source the signal gets stronger. There are other devices you can use to trace radio signals. i.e. rotating device that stops in the direction the signal is coming from. It is sometimes mounted on vehicle. When a radio reception is bad you can try different bands as some work better than others. Check on internet: Doppler, fox hunting The higher the frequency range, the less likely of skip especially 30 MHz and up. The higher the frequency the harder it is to penetrate trees and buildings so repeaters are needed. Repeaters are used mostly in VHF and UHF to get the signal to travel and to penetrate trees and buildings as a common problem with VHF and UHF. There is no skip in UHF and VHF only 30 MHz and down. The lower the frequency the better it is for signals to travel around the world. Why are police and fire radio coverage short, only local? Because they set up for their coverage area and use repeaters to extend the coverage they want. They don’t use HF if they did they would have skip. They use VHF and 800 MHz trunk and a line of sight transmissions. Why were radios big in the Vietnam war? Because radios back then were big. The technology keeps getting better and smaller. It wasn’t they wanted it big, it was the technology back then. Radios were big and heavy back then, now small and compact. In WWI they used Morse Code and telegraph and not radios. How would you send signals to Mars? You transmit using a big antenna at high power using a very good antenna. NASA has very good antennas. You transmit to a satellite orbiting Mars then relays the communication to a portable radio on Mars. Radio signals travel far in space and can pick up radio signals 30 light years away.All signals on earth eventually go in space and will travel far.