Как я провел летние каникулы
Весь список топиков на тему «Мои каникулы / My vacation» смотрите здесь
I think summer is the best season of all because it is warm, the nature is beautiful and we have great opportunities for rest. Summer is a time of holidays. We can go anywhere, spend our time near a river or a lake on fresh, green grass, swim in warm water, or climb mountains, play different games, ride a bicycle and so on.
I spend my summer holidays at my granny’s. There are many things there to do. What I did most of the time - I swam in the sea and sunbathed. Sometimes I made a fire with my friends at the seaside and cooked potatoes there. It was wonderful. We told anecdotes to each other, and did everything we wanted. I also got used to walk alone in the forest.
Как я провел летние каникулы
Весь список топиков на тему «Мои каникулы / My vacation» смотрите здесь
I think summer is the best season of all because it is warm, the nature is beautiful and we have great opportunities for rest. Summer is a time of holidays. We can go anywhere, spend our time near a river or a lake on fresh, green grass, swim in warm water, or climb mountains, play different games, ride a bicycle and so on.
I spend my summer holidays at my granny’s. There are many things there to do. What I did most of the time - I swam in the sea and sunbathed. Sometimes I made a fire with my friends at the seaside and cooked potatoes there. It was wonderful. We told anecdotes to each other, and did everything we wanted. I also got used to walk alone in the forest.
Дано:
λ(кр) = 530 нм = 530*10^-9 м
А = 3,75*10^-9 Дж
с = 3*10⁸ м/с
h = 6,63*10^-34 Дж*с
Ек - ?
Согласно уравнению Эйнштейна световая энергия фотона равна:
E = A + Eк, где Е = hν, ν = c/λ => E = hc/λ(кр), тогда:
hc/λ(кр) = А, т.к. при λ(кр) и ν(кр) Ек = 0
Значит, Ек = 0 Дж.
ответ: 0 Дж.