Calculus solutions 21- 88 1-29-10

Posted: January 29, 2010 in Calculus


problems 7-10problems 11-15problems 17-20

Listen guys, if you don’t get something, e-mail me or post a comment. I think you should understand most of this stuff. I tried to explain everything thoroughly in the solutions. Try doing some problems on your own.

Calculus homework from 01-15-2010

Posted: January 16, 2010 in Calculus

These are the solutions to our calculus review sheet, I only have 1 through 11, because he gave us the answer key to the rest of them. E-mail me if you have any questions. Check out these useful websites:






Leave comments and suggestions.  Thank you!

Stealth aircraft

Posted: December 6, 2009 in Planes

Stealth aircraft are aircraft that use stealth technology to interfere with radar detection as well as means other than conventional aircraft by employing a combination of features to reduce visibility in the visual, audio, infrared and radio frequency (RF) spectrum. Well known examples include the United States’ F-117 Nighthawk (1980s-2008), the B-2 Spirit “Stealth Bomber,” and the F-22 Raptor (

Introduction to Stealth Technology
Astounding leaps in airplane technology have yielded a new sort of defensive weapon: stealth. Planes capable of dropping nuclear bombs can now fly invisibly into enemy airspace, drop a payload, and fly back out without even being detected.
The way most airplane identification works is by constantly bombarding airspace with a RADAR signal. When a plane flies into the path of the RADAR, a signal bounces back to a sensor that determines the size and location of the plane. Other methods focus on measuring acoustic (sound) disturbances, visual contact, and infrared (heat) signatures.
Stealth technologies work by reducing or eliminating these telltale signals. Panels on planes are angled so that radar is scattered and no signal returns. Planes are also covered in a layer of absorbent materials that reduce any other signature the plane might leave. Shape also has a lot to do with the `invisibility’ of stealth planes. Extreme aerodynamics keep air turbulence to a minimum and cut down on flying noise. The B-2 stealth bomber has a “bat-wing” shape to reduce its RADAR cross-section, as well as visual recognition, especially on the horizon. Special low-noise engines are contained inside the body of the plane. Hot fumes are then capable of being mixed with cool air before leaving the plane. This fools heat sensors on the ground. This also keeps heat seeking missiles from getting any sort of a lock on their targets.
Stealth technology was initially developed to bypass intense Soviet defense systems. Since the end of the Cold War, stealth has proved itself in various conflicts. During the Gulf War, 56 Stealth Bombers flew 1,270 missions, and were never hit.
At a cost of $2 billion each, stealth bombers are not yet available worldwide, but military forces around the world will soon begin to attempt to mimic some of the key features of stealth planes, making the skies much more dangerous.

The Lockheed Martin/Boeing F-22 Raptor is a fifth-generation fighter aircraft that uses stealth technology. It was designed primarily as an air superiority fighter, but has additional capabilities that include ground attack, electronic warfare, and signals intelligence roles. Lockheed Martin Aeronautics is the prime contractor and is responsible for the majority of the airframe, weapon systems and final assembly of the F-22. Program partner Boeing Integrated Defense Systems provides the wings, aft fuselage, avionics integration, and all of the pilot and maintenance training systems.
The aircraft was variously designated F-22 and F/A-22 during the years prior to formally entering USAF service in December 2005 as the F-22A. Despite a protracted and costly development period, the United States Air Force considers the F-22 a critical component for the future of US tactical airpower, and claims that the aircraft is unmatched by any known or projected fighter, while Lockheed Martin claims that the Raptor’s combination of stealth, speed, agility, precision and situational awareness, combined with air-to-air and air-to-ground combat capabilities, makes it the best overall fighter in the world today. Air Chief Marshal Angus Houston, Chief of the Australian Defence Force, said in 2004 that the “F-22 will be the most outstanding fighter plane ever built.”(wikipedia) Right click on the images and select open image, to see the complete photos.