Saturday, 24 March 2012

Introduction to Simple Ciruits

hello friends! how are you ? i hope fine  well now today i will tell you about some basic circuits such as open circuit short circuit series circuit parallel circuits these are the basic introductory circuits which you need to know about these circuits first and then you will be able to construct or understand the higher circuits. in these circuits only the electron flow direction which is very simple. now i will tell you about the open circuit                          As the name suggest that open circuit have such a circuit which have opened. in other words we have to say that they have opened and can not complete...

Friday, 23 March 2012

Importance Of Resistance

                              As you know resistance is the oppostion of charge. Now my question is why we use the resistance ? What happen when we not use the resistance ? These are the question i will tell you in this article. Now i am talking in ideal condition when we have a source(ac or dc) such as battery for dc are connected both terminals with wire having zero resistance. then are short circuited and the battery will be burn. you think why you believe in my words. yeah are not believe on me but beleive on the simulation you will find out the results like this. you will see that when wires...

What is a breadboard?

A breadboard is used to build and test circuits quickly before finalizing any circuit design. The breadboard has many holes into which circuit components like ICs and resistors can be inserted. A typical breadboard is shown below: The bread board has strips of metal which run underneath the board and connect the holes on the top of the board. The metal strips are laid out as shown below. Note that the top and bottom rows of holes are connected horizontally while the remaining holes are connected vertically. To use the bread board, the legs of components are placed in the holes. Each set of holes connected by a metal strip underneath forms a node. A node is a point in a circuit where two components are connected. Connections between...

Thursday, 22 March 2012

Basics of measuring resistance

                                                                        When measuring resistance, all musltimeters use exactly the same principle whether they are analogue multimeters or digital multimeters. In fact other forms of test equipment that measure resistance also use the same basic principle.The basic idea is that the multimeter places a voltage at the two probes and this will cause...

Sunday, 18 March 2012

NASA-NSF Scientific Balloon Launches from Antarctica

 View Larger Image  WASHINGTON -- NASA and the National Science Foundation launched Monday a scientific balloon to study the effects of cosmic rays on Earth. The launch is one of five scientific balloons scheduled to launch from Antarctica in December. The Cosmic Ray Energetics And Mass (CREAM) experiment was designed and built at the University of Maryland. CREAM will investigate high energy cosmic-ray particles that originated from distant supernovae explosions in the Milky Way and arrived to Earth. Two hand-launched space science payloads are next in the balloon schedule. They will carry the Balloon Array for Radiation-belt Relativistic Electron Losses (BARREL) experiment designed and constructed at Dartmouth...

Radiation Belt Storm Probes (RBSP)

 The Radiation Belt Storm Probes mission is part of NASA’s Living With a Star Geospace program to explore fundamental processes that operate throughout the solar system, in particular those that generate hazardous space weather effects near the Earth and phenomena that could affect solar system exploration. RBSP is being designed to help us understand the sun’s influence on the Earth and near-Earth space by studying the planet’s radiation belts on various scales of space and time. Understanding the radiation belt environment and its variability has extremely important practical applications in the areas of spacecraft operations, spacecraft and spacecraft system design, mission planning, and astronaut safety. The mission’s...

Launching Balloons in Antarctica

Robyn Millan arrived in  Antarctica on Nov. 19, 2010  to launch test balloons for  the BARRELproject.  Credit: Henry Cathey They nicknamed it the "Little Balloon That Could." Launched in December of 2010 from McMurdo Station in Antarctica, the research balloon was a test run and it bobbed lower every day like it had some kind of leak. But every day for five days it rose back up in the sky to some 112,000 feet in the air.              Down on Earth, physicist Robyn Millan was cheering it on, hoping the test launch would bode well for the success of her grand idea: launches in 2013 and 2014 of 20 such balloons to float in the circular wind patterns above...

NASA Sub-Scale Solid-Rocket Motor Tests Material for Space Launch System

HUNTSVILLE, Ala. -- A sub-scale solid rocket motor designed to mimic NASA's Space Launch System, or SLS, booster design successfully was tested today by engineers at NASA's Marshall Space Flight Center in Huntsville, Ala. The 20-second firing tested new insulation materials on the 24-inch-diameter, 109-inch-long motor. The motor is a scaled down, low-cost replica of the solid rocket motors that will boost SLS off the launch pad. Marshall is leading the design and development of the SLS on behalf of the agency. The new heavy-lift launch vehicle will expand human presence beyond low-Earth orbit and enable new missions of exploration across the solar system. The test will help engineers develop and evaluate analytical models and...

Saturday, 17 March 2012

NASA Seeks Proposals for Green Propellant Technology Demonstrations

NASA is seeking technology demonstration proposals for green propellant alternatives to the highly toxic fuel hydrazine. As NASA works with American companies to open a new era of access to space, the agency seeks innovative and transformative fuels that are less harmful to our environment.                                          Hydrazine is an efficient and ubiquitous propellant that can be stored for long periods of time, but is also highly corrosive and toxic. It is used extensively on commercial and defense department satellites...

Conditions

CONDITIONAL STATEMENTS                            Here i will tell you how you apply the conditions in the c++ code. it is very much simple by applying the conditions you will perform your desired task. please at the code for understanding. WRITE A PROGRAME THAT TAKES NUMBER FROM USER AND TELLS EITHER IT IS GREATER THAN 10 OR NOT CODE for C++ #include<iostream.h>  // library void main() // main function { int x;    // integer cout<<"enter number"; // for display cin>>x; // store data which is given by user if(x>10) // condition cout<<"number...

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