Spektar elektromagnetnih talasa - Ksenija Tomić - Vladimir MilićevićNašaŠkola.Net
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
Spektar elektromagnetnih talasa,
Fizika,
Ksenija Tomić, III-4,
Vladimir Milićević,
Prva niška gimnazija "Stevan Sremac"
Elektromagnetni talasi - Sofija Tomić - Vladimir MilićevićNašaŠkola.Net
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
Elektromagnetni talasi,
Fizika,
Sofija Tomić, III-4,
Vladimir Milićević,
Prva niška gimnazija "Stevan Sremac"
Spektar elektromagnetnih talasa - Ksenija Tomić - Vladimir MilićevićNašaŠkola.Net
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
Spektar elektromagnetnih talasa,
Fizika,
Ksenija Tomić, III-4,
Vladimir Milićević,
Prva niška gimnazija "Stevan Sremac"
Elektromagnetni talasi - Sofija Tomić - Vladimir MilićevićNašaŠkola.Net
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
Elektromagnetni talasi,
Fizika,
Sofija Tomić, III-4,
Vladimir Milićević,
Prva niška gimnazija "Stevan Sremac"
Long-term effect of physical activity on energy balance and body compositionjuan pedro gracia mendez
This document describes a study that examined the long-term effects of physical activity on energy balance and body composition without interfering with energy intake. Sixteen women and sixteen men who were previously sedentary undertook a 44-week training program to run a half marathon. Measurements of body composition, energy intake, and energy expenditure were taken before and 8, 20, and 40 weeks after training began. While average daily metabolic rate increased 30% for both sexes with training, sleeping metabolic rate tended to decrease. Energy intake showed differing trends between men and women over time. By 40 weeks, men lost on average 1 kg of body mass and 3.8 kg of fat mass, while gaining 1.6 kg of protein mass.
Yachting in Phuket with children and young peoplesimpsoncharter
Yachting in Phuket with children and young people you have to prepare for every eventuality.Catamarans are fantastic for children because there is a large amount of deck space.
Este informe técnico describe una licuadora, incluyendo sus partes principales como el vaso, tapa, base y perilla de velocidad. Está hecha de vidrio, plástico, cobre y acero. Su función es triturar alimentos. El informe evalúa la licuadora en términos de rendimiento, facilidad de uso, seguridad y durabilidad. Se sugiere mejorar el diseño eliminando el ruido y agregando más cuchillas, y nombrar al nuevo diseño "Licuadora turbo silence".
Are 494 final_power_point_cassandra_van_valkenburgCassandra Soleil
Digital ethnography involves observing and analyzing cultures in online virtual spaces. The researcher interviewed artist Scottius Polke in Second Life about his artwork. Polke creates assemblage pieces by combining found objects, and translates some of his real-life works into Second Life using hand-drawn textures. He enjoys how Second Life allows him to manipulate scale and add interactivity. While it lacks tactile aspects, Second Life is beneficial for expression and collaboration.
The document lists 9 different groups, labeled Kelompok 1 through Kelompok 9, with each group on its own line and no other details provided about the groups.
The Art & Science of Employee EngagementJustin Zawaly
Best practices and simple tips for business leaders. Learn how to capture, analyze, and take action on employee survey feedback from leading HR practitioners and I/O psychologists
The document provides an overview of an individual named Venkat Iyer in 3 paragraphs. It describes him as a gifted student who was elected to a student government role without opposition. It notes that he excels at math and games. The second paragraph discusses his broad range of talents and interests, including sports, music, dancing, and more. The third paragraph provides additional personal details about Venkat, such as his love of chocolate and reptiles. It concludes by inviting others to celebrate with him on June 9th.
Sharad Singh presented on Invezta, a FinTech platform that aims to democratize quality investments and provide institutional-level advice to common investors. Invezta offers zero-fee mutual funds and a pay-if-it-works model. Using Invezta can result in a retirement corpus over 50% larger due to lower costs and better advice. Analysis shows that for an investor starting with Rs. 5 lakhs and investing Rs. 10k monthly until age 60, Invezta's services can boost returns by over Rs. 4 crores compared to a normal investor.
The document describes 6 workshops held by the Association of Women Weavers in San Juan La Laguna Sololá Guatemala. The workshops taught techniques for making natural dyed fabrics using leaves, including slicing, boiling, soaking leaves to create colors like gray, yellow, green, orange and mustard, and using a backstrap loom to weave the dyed fabrics.
I am a spiritual life coach, and I am launching a website you can sign up for coaching sessions, check out the resources page for freebies, and other goodies.
Difrakcija svetlosti - Dušan Kostić - Vladimir MilićevićNašaŠkola.Net
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
Difrakcija svetlosti,
Fizika,
Dušan Kostić, III-4,
Vladimir Milićević,
Prva niška gimnazija "Stevan Sremac"
Long-term effect of physical activity on energy balance and body compositionjuan pedro gracia mendez
This document describes a study that examined the long-term effects of physical activity on energy balance and body composition without interfering with energy intake. Sixteen women and sixteen men who were previously sedentary undertook a 44-week training program to run a half marathon. Measurements of body composition, energy intake, and energy expenditure were taken before and 8, 20, and 40 weeks after training began. While average daily metabolic rate increased 30% for both sexes with training, sleeping metabolic rate tended to decrease. Energy intake showed differing trends between men and women over time. By 40 weeks, men lost on average 1 kg of body mass and 3.8 kg of fat mass, while gaining 1.6 kg of protein mass.
Yachting in Phuket with children and young peoplesimpsoncharter
Yachting in Phuket with children and young people you have to prepare for every eventuality.Catamarans are fantastic for children because there is a large amount of deck space.
Este informe técnico describe una licuadora, incluyendo sus partes principales como el vaso, tapa, base y perilla de velocidad. Está hecha de vidrio, plástico, cobre y acero. Su función es triturar alimentos. El informe evalúa la licuadora en términos de rendimiento, facilidad de uso, seguridad y durabilidad. Se sugiere mejorar el diseño eliminando el ruido y agregando más cuchillas, y nombrar al nuevo diseño "Licuadora turbo silence".
Are 494 final_power_point_cassandra_van_valkenburgCassandra Soleil
Digital ethnography involves observing and analyzing cultures in online virtual spaces. The researcher interviewed artist Scottius Polke in Second Life about his artwork. Polke creates assemblage pieces by combining found objects, and translates some of his real-life works into Second Life using hand-drawn textures. He enjoys how Second Life allows him to manipulate scale and add interactivity. While it lacks tactile aspects, Second Life is beneficial for expression and collaboration.
The document lists 9 different groups, labeled Kelompok 1 through Kelompok 9, with each group on its own line and no other details provided about the groups.
The Art & Science of Employee EngagementJustin Zawaly
Best practices and simple tips for business leaders. Learn how to capture, analyze, and take action on employee survey feedback from leading HR practitioners and I/O psychologists
The document provides an overview of an individual named Venkat Iyer in 3 paragraphs. It describes him as a gifted student who was elected to a student government role without opposition. It notes that he excels at math and games. The second paragraph discusses his broad range of talents and interests, including sports, music, dancing, and more. The third paragraph provides additional personal details about Venkat, such as his love of chocolate and reptiles. It concludes by inviting others to celebrate with him on June 9th.
Sharad Singh presented on Invezta, a FinTech platform that aims to democratize quality investments and provide institutional-level advice to common investors. Invezta offers zero-fee mutual funds and a pay-if-it-works model. Using Invezta can result in a retirement corpus over 50% larger due to lower costs and better advice. Analysis shows that for an investor starting with Rs. 5 lakhs and investing Rs. 10k monthly until age 60, Invezta's services can boost returns by over Rs. 4 crores compared to a normal investor.
The document describes 6 workshops held by the Association of Women Weavers in San Juan La Laguna Sololá Guatemala. The workshops taught techniques for making natural dyed fabrics using leaves, including slicing, boiling, soaking leaves to create colors like gray, yellow, green, orange and mustard, and using a backstrap loom to weave the dyed fabrics.
I am a spiritual life coach, and I am launching a website you can sign up for coaching sessions, check out the resources page for freebies, and other goodies.
Difrakcija svetlosti - Dušan Kostić - Vladimir MilićevićNašaŠkola.Net
Takmičenje na portalu www.nasaskola.net
"biramo najbolju lekciju"
februar 2012. godine,
Difrakcija svetlosti,
Fizika,
Dušan Kostić, III-4,
Vladimir Milićević,
Prva niška gimnazija "Stevan Sremac"
2. Светлосни зраци се шире од извора
светлости.
Скуп свих светлосних зрака који
пролазе кроз неку површину чине
светлосни флукс кроз ту површину: Φ
[lm].
Густина светлосног флукса
(осветљеност): E=Φ/S [lx]
Јачина светлосног извора I=Φ/ω [cd],
део Φ кроз просторни угао
Основе фотометрије
3. Таласна дужина видљиве
светлости иде од:
400nm (љубичаста) до
700nm црвена
испод 400nm је ултраљубичаста
изнад 700nm инфрацрвена
светлост.
4. Фотодиоде
Унутрашња грађа фотодиоде је слична
грађи обичне диоде. Разлика је томе што
је код фотодиоде PN спој откривен и на
њега могу да падају светлосни зраци. Кад
светлост удари у PN спој, стварају се
парови електрон-шупљина. Ако се диода
инвезно поларише тада кроз њу тече
повећана инверзна струја. Повећање
инверзне струје је сразмерно осветљају
(100nA/lx)
6. Фотодиода нормално ради у области
видљиве светлости и у инфрацрвеној
области. Најосетљивија је за за таласну
дужину око 800nm.
7. Најчешће се користи као
детектор постојања светлости,
сигналних уређаја, свтловода.
На диоду је прикључен напон
Еc. Ударом светлосних зрака
диода постаје делимично
проводна, па кроз њу протиче
струја која на отпорнику R
ствара напон због кога
почиње да тече струја базе
транзистора. Транзистор
постаје проводан и активира
релеј.
8. Фототранзистори
Фототранзистори су такође слични
обичним транзисторима, и код њих је
спој откривен и на њега пада светлост.
Ако се обичном транзистору открије
полупроводник он постаје
фототранзистор. Такође и
фототранзистор може да ради као
обичан транзистор.
9.
10.
11. Примењују се такође за детекцију
постојања или не постојања
светлости.
Активира се када на њега падне
светлост, па активира и релеј.
12. Фотоотпорници
Најчешће се праве од кадмијум-
сулфида. У њему нормално има мало
слободних носиоца ако је у мраку. Ако се
осветли, удар светлосних зрака ствара
слободне носиоце. Што је већа
осветљеност већи је њихов број, а
отпорност се смањује.
13. Један од највећих недостатака је
велико време укључивања и
искључивања (1ms). Помоћу њих се
праве аутомати за укњучење уличног
осветљења, светлећих реклама...
14. Светлеће полупроводничке
диоде
Светлеће полупроводничке диоде су поларисане
у пропусном смеру. Приликом рекомбинације се
ослобађа енергија у виду светлости. Боја зависи од
полупроводника и примесе. Најчешће се као
полупроводник користи галијум арсенид, а као
примеса цинк, телур, селен...
Међутим ове диоде имају лош степен
искоришћења 0,5%, тј мали проценат енергије се
претвара у светлост (0,5%), док се преостали део
(99,5%) претвара у топлоту.