Sunday, June 1, 2014

help if u r a sciency geek?

Q. what are the diffrences between a longitudinal and transverse wave and please make it simple and what are the uses of ultrasound and infrasound


Answer
The differences between a longitudinal and transverse waves are that longitudinal waves travels in a parallel motion while the transverse waves travel in a perpendicular motion.

Uses of Ultrasound:
Ultrasound is used in sonography- looking at human babies in the motherâs womb. Ultrasound can be used to work out how old the baby is, determine its location, find the location of the placenta, determine the sex of the baby (male or female), check for heartbeat, check for normal fetal growth and check for any abnormalities. Note that the results from an ultrasound are occasionally wrong. Some people are surprised when they have a girl after the ultrasound told them that they would have a boy.
In industry, ultrasound is used to determine how thick objects such as metals and plastic are.
Ultrasound has been shown to work with antibiotics in killing bacterial cells.
Bacteria, particularly those in sewage, can be disintegrated (killed) by using ultrasonic waves.
Believe it or not, ultrasound can be used to clean teeth. Dental hygienists use ultrasound.
Focused pulses of ultrasound can break up kidney stones and gallstones into little fragments that can be passed from the body with less difficulty.
Recently, studies have shown that ultrasound can stimulate the growth of bones.
Ultrasound is used in elastography. This allows doctors to work out which tissues in the body are healthy and which are unhealthy.
Ultrasonic waves can be used to weld plastic together. The waves make heat energy between the objects that are joined.
Ultrasonic cleaners are used by jewelers and doctors to clean things like watches, jewelery, lenses and surgical instruments.
Liposuction is assisted by ultrasound.

Uses for infrasound:
Wind turbine monitoring.
Animal monitoring, including elephants, hippos, rhinos, giraffes, tigers, alligators, certain birds, etc.
Earthquake and tsunami monitoring.
Bolide or detonating fireball meteor monitoring.
Volcano monitoring.
Avalanche monitoring.
Thunderstorm, lightning and severe weather monitoring.
Sonic boom monitoring.
Explosion monitoring.
Aurora monitoring.
Alleged haunted site monitoring.
Rotating equipment monitoring.
Sick building analysis.
Environmental assessments.
Microbarom monitoring.
Helicopter monitoring.
Tornado monitoring.

How to fix my new computer Internet?




Emilee


I just got a Samsung Notebook Series 5 and it was a certified open box from Geek Squad which means they made sure everything was working properly before they sold it and when I brought it home and tried to go on the Internet it didn't work. My sister was using the same wifi and her computer was working just fine. So, I went to the control panel and clicked on troubleshooting for the Internet connection and it said there was a broken cable. I don't see any broken cable. It maybe internal in the actual laptop. The only time the Internet works is when I first turn it on and the longer lm on it or the more tabs I open up, the Internet stops working. I already brought it in TWICE to Geek squad and they haven't done sh** to fix it and I'm ready to just get a new computer. It's still within its warranty so they have been looking at it for free and I think that's maybe why they aren't doing anything. -.- I just really want to get it fixed! Can I do anything? Or do I just need a new computer?


Answer
When the computer tells you the cable is broken or disconnected, it is talking about the Ethernet LAN connection not the WiFi connection.

Most laptops have both Ethernet and WiFi adapters.

You could try connecting directly to your wireless router via a Ethernet cable.

You can get a stronger WiFi adapter that will improve your wireless range.

Wireless adapters come in many types and sizes, you may want a model with external antennas. Here is a highly rated USB model with dual antennas. http://www.amazon.com/gp/product/B006JWMOOI/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B006JWMOOI&linkCode=as2&tag=excharge-20

That being said,

Wireless signals are affected by many factors including distance, wall density, electrical interference, directional antenna range, etc.

All of these factors will affect your actual wireless range. As wireless connection quality varies the connection speeds are renegotiated. The WLAN connection may start at 150 Mbps and end up at less than 10 Mbps or drop entirely.

Note: The WLAN connection speed is only between the device and the router, you are still limited by your WAN Internet speed provided by your ISP.

Often signal strength (bars) displayed by your device can be misleading, WiFi interference can cause havoc with consistent speed. You can prove this fact by moving your WiFi device closer to the wireless router and retesting the speeds. http://speedtest.net Be sure the wireless router is not close to other electrical equipment that may interfere with the WiFi signal.

You should try to centrally locate your wireless router or gateway up high and away from dense walls and electrical and 2.4 GHz wireless interference such as microwave ovens, cordless phones, baby monitors, etc.

For serious gaming or video streaming your best bet is always a direct Ethernet connection. Ethernet is unaffected by wireless interference and will give you a rock solid, stable network connection.

Good Luck...




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