пуля движующиеся скоростью 400 м/с пробивает деревянную доску и выходить из неё и имеет скорость 200 м /с.Какая часть энергии пошла на нагревание пули?
klanana
2
06.04.2021 18:43
15
Другие вопросы по теме Физика
alamez69
29.05.2019 04:50
KopiYT
29.05.2019 04:50
vitoszemko200
29.05.2019 04:50
RomanBelyy01
29.05.2019 04:50
Kolyan097
29.05.2019 04:50
Nastya521478
29.05.2019 04:50
asyazakharchenko3011
29.05.2019 04:50
Krooop04
29.05.2019 04:50
vereina
28.06.2019 17:20
Популярные вопросы
- Read the text and find out if your answers were right. Galaxies The Sun...
3 - Put in the where necessary. Example: ... Moon goes round ... Earth.—...
3 - Read and remember. We use the when there is only one of something (unique):...
2 - Listen and repeat the English words. Find the same words in Russian....
3 - Say 3 nouns, 3 verbs, 3 adjectives and 3 adverbs that can be used for...
1 - Name: the Earth _ Other names: the World, the Hlue Planet Address: the...
2 - Read the Earth page from the encyclopedia below. Find the answers to...
3 - Say what facts from the texts (Ex. 24) you have found surprising....
2 - Take one of the proverbs as a title. Make up a story....
2 - Review the cases when It s is used: To describe the weather: It s sunny...
2
3/4
Объяснение:
v1=400 м/с v2=200 м/с n=?
===
E1=m*v1²/2
E2=m*v2²/2
E2/E1=(v2/v1)²=(200/400)²=1/4
n=1-1/4=3/4