Контрольная работа № 2  по физике Учащегося группы ТОРА 25-19

ФИО

1 вариант

1.Найти массу фотона: 1) красных лучей видимого света ( = 710–7 м); 2) рентгеновских лучей (( = 0,2510–10 м); 3) гамма лучей (( = 1,2410–12 м).

2. Определить энергию, массу и импульс фотона с длиной волны  = 0,01610–10 м

3. С какой скоростью должен двигаться электрон, чтобы его импульс был равен импульсу фотона с длиной волны λ = 5200⋅10-10 м?

4. Сколько длин волн монохроматического света с частотой колебаний  = 51014 Гц уложится на пути длиной l = 2,4 мм: 1) в вакууме; 2) в стекле; 3) в алмазе? 

5. В какой элемент превращается 92238U после трех α-распадов и двух β-распадов?

​

The Islanders have experienced a lot of success over the past few seasons, and have built up a strong identity consisting of tenured players. However, their recent achievements would not have been possible without the help of some short-term talent.

Going back to the 2007-2008 season, the last year without a current Islander on the roster, there have been a few short-term Islanders who left a positive impact on the franchise. Here is a look at some influential Islanders who you may have forgotten about due to their relatively brief stints with the organization.

Henry Rudolph Steiner, a young piano salesman, was a real adventurer. He had always dreamed of adventure.As he was walking down the street, his attention was caught by a black man handing out cards. The Negro thrust a card into Rudolph's hand. There was nothing on one side of the card, and on the other, "Green Door." And then Rudolph saw that three paces away a man had thrown away the card he had given him as he passed. Passing by it again, he received the card again. The same thing was written on the first card. There were three maps on the sidewalk. Whatever the words on the cards meant, the negro had chosen him twice from the crowd.