Astrofisika

"Kebanggaan Terbesar kita  adalah bukan tidak pernah gagal, tetapi bangkit kembali setiap kali kita jatuh dan menjadi lebih hebat kemudian"

~Arip~

Kebanggaan kita yang terbesar adalah bukan tidak pernah gagal, tetapi bangkit kembali setiap kali kita jatuh Read more at: http://operatorku.blogspot.com/2012/07/kata-kata-mutiara-penuh-makna-update.html Copyright by operatorku.blogspot.com Terima kasih sudah menyebarluaskan aritkel ini

Ketika kamu merasa sulit untuk mewujudkan mimpimu, percayalah bahwa sebuah mimpi yang lebih besar sedang menantimu. Have Faith! Read more at: http://operatorku.blogspot.com/2012/07/kata-kata-mutiara-penuh-makna-update.html Copyright by operatorku.blogspot.com Terima kasih sudah menyebarluaskan aritkel ini

Ketika kamu merasa sulit untuk mewujudkan mimpimu, percayalah bahwa sebuah mimpi yang lebih besar sedang menantimu. Have Faith! Read more at: http://operatorku.blogspot.com/2012/07/kata-kata-mutiara-penuh-makna-update.html Copyright by operatorku.blogspot.com Terima kasih sudah menyebarluaskan aritkel ini

Lecture 9 - Special and General Relativity 

 

 

Overview:

The discussion of black holes continues with an introduction of the concept of event horizon. A number of problems are worked out to familiarize students with mathematics related to black hole event horizons. In a longer question and answer session, Professor Bailyn discusses the more mystifying aspects of the nature of black holes and the possibility of time travel. Finally, the issues of reconciling Newton's laws of motion with Special Relativity, and Newton's law of gravity with General Relativity, are addressed.

Course Media   Transcript html Audio mp3 Low Bandwidth Video mov [100MB] High Bandwidth Video mov [500MB]

Resources:

Class Notes - Lecture 9 [PDF]

Sumber:

1. The University of Yale Open Course Ware

2. Professor Bailyn Websites
http://www.astro.yale.edu/bailyn/
http://www.astro.yale.edu/

Ucapan Terima Kasih:

1. Bapak. Prof. Dr. Ing. H. B. J. Habibie.

2. Departemen Pendidikan Nasional

3. Kementrian Riset dan Teknologi

4. Lembaga Penerbangan dan Antariksa Nasional
 


Ditulis Ulang Oleh:

Arip Nurahman


Department of Physics, Indonesia University of Education

&

Follower Open Course Ware at MIT-Harvard University, Cambridge. USA.

Semoga Bermanfaat dan Terima Kasih

Indonesian Space Force Command

Indonesian Space Force Command   

 Komando Untuk Keamanan Luar Angkasa 

Dari Angkatan Antariksa Indonesia

B-2 Spirit
A USAF B-2 Spirit in flight
Role	Stealth bomber
National origin	United States
Manufacturer	Northrop Corporation Northrop Grumman
First flight	17 July 1989
Introduction	April 1997
Status	Active service: 20 aircraft
Primary user	United States Air Force
Number built	21[1][2]
Program cost	US$44.75 billion (projected through 2004)[3]
Unit cost	$737 million (1997 cost for each aircraft only)[3]

Specifications (B-2A Block 30)

 

 

Data from USAF Fact Sheet,^[4] Pace,^[59] Spick,^[39] Globalsecurity^[60]

General characteristics

• Crew: 2
• Length: 69 ft (21.0 m)
• Wingspan: 172 ft (52.4 m)
• Height: 17 ft (5.18 m)
• Wing area: 5,140 ft² (478 m²)
• Empty weight: 158,000 lb (71,700 kg)
• Loaded weight: 336,500 lb (152,200 kg)
• Max takeoff weight: 376,000 lb (170,600 kg)
• Powerplant: 4× General Electric F118-GE-100 non-afterburning turbofans, 17,300 lbf (77 kN) each

Performance

• Maximum speed: Mach 0.95 (525 knots, 604 mph, 972 km/h)
• Cruise speed: Mach 0.85^[39] (470 knots, 541 mph, 870 km/h)
• Range: 6,000 nmi (11,100 km (6,900 mi))
• Service ceiling: 50,000 ft (15,200 m)
• Wing loading: 67.3 lb/ft² (329 kg/m²)
• Thrust/weight: 0.205

Armament

• 2 internal bays for 50,000 lb (23,000 kg) of ordnance.^[39]

• 80× 500 lb class bombs (Mk-82) mounted on Bomb Rack Assembly (BRA)
• 36× 750 lb CBU class bombs on BRA
• 16× 2000 lb class weapons (Mk-84, JDAM-84, JDAM-102) mounted on Rotary Launcher Assembly (RLA)
• 16× B61 or B83 nuclear weapons on RLA

Later avionics and equipment improvements allow B-2A to carry JSOW, GBU-28, and GBU-57A/Bs as well. The Spirit is also designated as a delivery aircraft for the AGM-158 JASSM when the missile enters service.

Semoga Bermanfaat dan Terima Kasih

Astrofisika

"Marilah buat hidup kita sempurna dan membuat hidup orang-orang disekitar kita bahagia, karena ini akan menjadikan hidup kita bermanfaat,  masalah bukan untuk dihindari karena masalah akan membuat hidup kita kuat"

~Arip~

 

Frontiers and Controversies in Astrophysics 

 

 

 Lecture 8 - Introduction to Black Holes

Overview: 

The second half of the course begins, focusing on black holes and relativity. In introducing black holes, Professor Bailyn offers a definition, talks about how their existence is detected, and explains why (unlike in the case with exoplanets where Newtonian physics was applied) Einstein's Theory of Relativity is now required when studying black holes. The concepts of escape and circular velocity are introduced. A number of problems are worked out and students learn how to calculate an object's escape velocity. A historical overview is offered of our understanding and discovery of black holes in the context of stellar evolution.

Course Media

Transcript

html

Audio

mp3

Low Bandwidth Video

mov [100MB]

High Bandwidth Video

mov [500MB]

Resources:

Class Notes - Lecture 8 [PDF]

Sumber:

1. The University of Yale Open Course Ware

2. Professor Bailyn Websites
http://www.astro.yale.edu/bailyn/
http://www.astro.yale.edu/

Ucapan Terima Kasih:

1. Bapak. Prof. Dr. Ing. H. B. J. Habibie.

2. Departemen Pendidikan Nasional

3. Kementrian Riset dan Teknologi

4. Lembaga Penerbangan dan Antariksa Nasional
 


Ditulis Ulang Oleh:

Arip Nurahman

Department of Physics, Indonesia University of Education

&

Follower Open Course Ware at MIT-Harvard University, Cambridge. U.S.A.

Semoga Bermanfaat dan Terima Kasih