Thursday, May 8, 2008

Agni - III



Agni-III, the India’s long distance surface-to-surface missile, with capability to hit targets as far away as 3,000 km, with both conventional and nuclear warheads is ready for induction into the Defence forces.

The second consecutive flight success of the country’s most ambitious missile today has led confident missile scientists of the Defence Research and Development Organisation (DRDO), to declare that Agni-III was ready for the users to test and induct.

Today’s launch of Agni-III from the Wheeler Island, off the coast of Orissa at 09:56 hrs, was described by the DRDO as a complete success. The missile took off in textbook fashion, reached its desired height and travelled the distance.

The success is a testimony to the scientific expertise of Defence scientists and the rugged systems and parts manufactured to highest quality standards by the Indian industry.

Coming, coincidentally in the Golden Jubilee year of the DRDO, Agni-III would propel India into a select group of countries with IRBM (intermediate range ballistic missile) capabilities and adds yet another dimension to the national deterrence. It can effectively answer the threat perception from anywhere in the Asian continent, said Defence experts.

The DRDO now boasts of a missile reach of beyond 3,000 km to hit targets and also initial success in intercepting and destroying incoming enemy missiles, through the development of a Ballistic Missile Defence system.

It has already demonstrated Agni-1 (short range of 700 km), inducted into the Army and Agni-2 (range of 1,500 km), which has recently gone through user trials as well.

Describing the test, Dr Avinash Chander, Programme Director of Agni said, “The missile reached the pre-designated target in 800 seconds, travelling through a peak height of 350 km with a velocity of more than 4,000 metres/second. Two Indian Naval Ships positioned near the target location South of equator, have confirmed the impact of the missile”.

With this flight, the developmental flights of Agni-III are complete and the system is ready for induction, he declared immediately after the flight from Wheeler Island.

This is the third flight test in the series of Agni-III, which was carried out to establish the repeatability of missile performance. The first trial in July 2006 failed, while the second in April 2007, was a success. Defence experts, however, feel that a couple of more trials could be in order, for the long distance missile to be completely ready for manufacture and induction.

AGNI 3 missile, is a all composite material, two-stage solid propellant system with a length of 17 metres, diameter of 2 metres and launch weight of 50 tonnes, carries a payload of 1.5 tonnes. It is a rail mobile system capable of being launched from any where in India.

It is equipped with sophisticated navigation, guidance and control systems along with advanced distributed architecture based on board computer systems. Nearly 250 Indian industries are involved in India’s missile programme and more 70 in the Agni programme.

On the novelty of the present flight, Dr Avinash Chander said the high performance indigenous ring laser gyro-based navigation system has been flight tested for the first time in AGNI missile systems.

The missile was tracked by various telemetry stations, electro optic systems and radars located along the coast, Port Blair and by the downrange ships positioned near the target location. The data from the various stations is transmitted in real time through an advanced communication network of DRDO for online performance evaluation and range safety, a DRDO press release stated.

The launch was witnessed by Mr M. Natarajan, Scientific Advisor to the Defence Minister, Mr Sundaram Krishnan, Advisor to the Defence Minister, Dr V.K. Saraswat, Chief Controller (R&D) and other senior officials of the forces. The Defence Minister, Mr A.K. Antony, congratulated the Mission Director and all the scientists of DRDO for the successful launch of Agni-III, the DRDO release added.

Wednesday, May 7, 2008

Sachin Tendulkar honoured with Padma Vibhushan

THE MASTER blaster Sachin Tendulkar has come a long way in cricket. He stands in the league of world's most extraordinary cricketers. He got another feather in his cap when he was honoured with the Padma Vibhushan award by Pratibha Patil, President of India, in New Delhi on Monday (May 5).

On receiving the prestigious award, he mused, “This is very close to my heart. I am very happy. It is difficult to explain in words”, a thrilled Tendulkar expressed after receiving it.

“In my career of 18 years, I have received numerous awards but this one is close to my heart. I am really amused that the government has acknowledged my contribution to the game and the nation", he added.

The veteran batsman, who is the current captain of the Mumbai Indians team in the ongoing Indian Premier League Twenty20 tournament, is missing the action because of a groin injury.

His wife Anjali Tendulkar accompanied him to the grand ceremony. She told, “I am proud of him. He plays from the heart and he does not need an award to perform better.”

Moreover, swimmer Bula Chowdhury Chakraborty received the Padma Shri award from the President at the Rashtrapati Bhavan at the same occasion.



Mumbai Indians win against RR


MUMBAI: Shane Warne had shown respect for big-hitting batsmen in the Mumbai Indians line-up, stressing about plans for mavericks Sanath Jayasuriya and Robin Uthappa among others in the pre-match talk show.

He did not take into account big-hearted bowlers in the rival camp and whether his batsmen were prepared for serious cross-examination.

The questions posed by Man of Match Ashish Nehra’s swing (three for 13), youngster Dhaval Kulkarni’s bounce (two for 21) and slow teasers from the seasoned Shaun Pollock and Dwayne Bravo went unanswered on a bowlers day out in the DLF-Indian Premier League seventh round.

Mumbai won by seven wickets after the high-flying visitor was brought down to earth at the D.Y. Patil Stadium, bowled out for 103 in 16.2 overs.

Heading the support cast for Mumbai bowlers was wicketkeeper Yogesh Takawale who showcased his talent and temperament behind and in front of the wickets on his home ground.

The D.Y. Patil Academy student pulled off a stumping of captain Shaun Pollock, snapped up three catches and had enough enthusiasm to go out there under the lights and blast the Rajasthan attack for 27 runs.

The home team overhauled the target comfortably in 15.1 overs for its third back-to-back win of the event.

Jayasuriya perished early, swishing at a ball from Watson without getting in line and holing out to Yusuf Pathan at mid-wicket.

The Lankan marauder had gone, but the 41-run first wicket stand with Takawale, off 45 balls had seen off the first charge from the Rajasthan pace bowlers, forcing Warne to take over. The first ball from the Aussie spin genius floored Takawale, beaten by the flipper, which skid through to rattle the stumps.

Earlier, Mumbai proved bowlers can rule in Twenty20, bowling out the opposition for 103 after Pollock opted to field.

The surprise weapons turned out to be bustling Kulkarni’s ability to generate bounce, supported by the reflex catches from Takawale. Swapnil Asnodkar 39 (36b) waged a lone battle at the crease.

Pollock stunned Smith with a slower ball. The Rajasthan opener was deceived on the front foot and gave wicketkeeper Takawale ample time to complete the stumping on the second attempt.

Nehra swung one past Yusuf Pathan’s flashing blade as Mumbai wrested early momentum. Asnodkar made batting look easy at the other end, picking the line early against both the new ball bowlers and forced shots through the off side.

He escaped once when a mishit fell short off Abhishek Nayar, running in from deep mid-wicket and diving in front as Rajasthan crossed the 50-run mark in the seventh over.

Pollock’s bowling change paid off when Bravo broke the 53-run stand between Asnodkar and Shane Watson 32 (20b).

Kulkarni and Takawale then teamed up to send back Ravindra Jadeja, who was caught behind fending a short ball.

Takawale, watched by D.Y. Patil Academy coach Abey Kuruvilla, produced the magic moment with a turn and leap.

Warne was Kulkarni’s second victim, while a frustrated Asnodkar perished to Rohan Raje.

Rajasthan’s plans of posting a challenging score crumbled as Nehra’s swing proved too potent for the tail.

Bravo brought the curtain down on the IPL league topper by foxing tailender Trivedi with a slower one.

The scores: Rajasthan Royals: G. Smith st. Takawale b Pollock 5, S. Asnodkar c Uthappa b Raje 39, Y. Pathan b Nehra 1, S. Watson b Bravo 32, Mohd. Kaif c Nehra b Raje 4, R. Jadeja c Takawale b Kulkarni 0, S. Warne c Takawale b Kulkarni 7, S. Tanvir b Nehra 6, M. Rawat c Takawale b Nehra 1, S. Trivedi b Bravo 1, Munaf (not out) 0, Extras (lb-2, w-5): 7; Total (in 16.2 overs) 103.

Fall of wickets: 1-12, 2-21, 3-74 , 4-82, 5-82, 6-94, 7-95, 8-102, 9-103.

Mumbai Indians bowling: Pollock 3-0-19-1, Nehra 3-0-13-3, Kulkarni 3-0-21-2, Bravo 2.2-0-12-2, Jayasuriya 2-0-17-0, Raje 3-0-19-2.

Mumbai Indians: Y. Takawale b Warne 27, S. Jayasuriya c Y. Pathan b Watson 18, R. Uthappa (not out) 34, D. Bravo c Asnodkar b Watson 1, A. Nayar (not out) 12, Extras (lb-2, w-10): 12; Total (for three wkts. in 15.1 overs) 104.

Fall of wickets: 1-41, 2-64, 3-72.

Rajasthan Royals bowling: Tanvir 3.1-0-13-0, Munaf 3-0-21-0, Trivedi 3-0-23-0, Watson 4-0-26-2, Warne 2-0-19-1.



Tuesday, May 6, 2008

LEMON Battery

Lemon Battery




Creating a battery from a lemon is a common project in many science text books. Successfully creating one of these devices is not easy.
Batteries consist of two different metals suspended in an acidic solution. Copper and Zinc work well as the metals and the citric acid content of a lemon will provide the acidic solution.
Batteries like this will not be able to run a motor or energize most light bulbs. It is possible to produce a dim glow from an LED.

The picture at the top of this page shows a basic lemon battery, a lemon, copper penny and zinc coated nail.

The lemon: A large, fresh, "juicy" lemon works best.
The nail: Galvanized nails are coated in zinc. I used a 2" galvanized common nail.
The penny: Any copper coin will work. (Canadian pennies from 1960 - 2001 all worked)





Creating the battery: Insert a penny into a cut on one side of the lemon. Push a galvanized nail into the other side of the lemon.
The nail and penny must not touch.

This is a single cell of a battery. The zinc nail and the copper penny are called electrodes. The lemon juice is called electrolyte.
All batteries have a "+" and "-" terminal. Electric current is a flow of atomic particles called electrons. Certain materials , called conductors, allow electrons to flow through them. Most metals (copper, iron) are good conductors of electricity. Electrons will flow from the "-" electrode of a battery, through a conductor, towards the "+" electrode of a battery. Volts (voltage) is a measure of the force moving the electrons. (High voltage is dangerous!)







I have connected a volt meter to our single cell lemon battery. The meter tells us this lemon battery is creating a voltage of 0.906 volts.
Unfortunately this battery will not produce enough current (flowing electrons) to light a bulb.


To solve this problem we can combine battery cells to create higher voltages. Building more lemon batteries and connecting them with a metal wire from "+" to "-" adds the voltage from each cell.

The two lemon batteries above, combine to produce a voltage of 1.788 volts. This combination still does not create enough current to light a small bulb. Note the red wire connecting the batteries is joined from "+" (penny) to "-" (galvanized nail).

Four lemon batteries create a voltage of 3.50 volts. We should be able to light up a small device like an LED (Light Emitting Diode).
Note the connecting wires go from "+" to "-" on each battery.


LED

To turn on an LED you must determine the "+" and "-" connections. If you look closely at the red plastic base of an LED you will notice a "flat" spot (indicated by arrow above). The wire that comes out beside the flat spot must connect to the "-" side of a battery, the other wire to the "+" side.


Important information about LEDs: LEDs are designed to work at very low voltages (~ 2V) and low currents. They will be damaged if connected to batteries rated at over 2 volts. LEDs require resistors to control current when used with batteries rated at over 2 volts. Lemon batteries produce low current. It is OK to connect an LED to a lemon battery.


In the above image, electrons flow from the "-" (nail) end of our lemon battery through the LED (making it glow) then back to the "+" (penny) end of the battery. This is an electronic circuit. The LED glows dimly with this configuration.



Improving your battery.

The quality of the copper and zinc can be a problem for a battery like this. Pennies in particular are rarely pure copper.
Try substituting a length of 14 gauge copper wire (common house wire) for the penny. Experiment with different lengths and configurations of electrodes. Other sources of zinc and copper may be found in the plumbing supply department of a hardware store.