Ответ учителя по предмету Физика
Дано:
P=900 км/м³
V=5 л
Найти:
Fт-?
РЕШЕНИЕ
Fт=m×g
m=P×V
m=900×5=4500 кг
Fт=4500×9,8=44100(Н)
ОТВЕТ: Fт=44100 (Н)
Смотри вложение:
Дано:
P=900 км/м³
V=5 л
Найти:
Fт-?
РЕШЕНИЕ
Fт=m×g
m=P×V
m=900×5=4500 кг
Fт=4500×9,8=44100(Н)
ОТВЕТ: Fт=44100 (Н)
Смотри вложение:
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Everything is made up of atoms. Each one of them has three particles: protons, neutrons and electrons. Electrons spin around the centre of an atom. They have a negative charge. Protons, which are in the centre of atoms, have a positive charge.
Normally, an atom has as many protons as it has electrons. It is stable or balanced. Carbon, for example has six protons and six electrons.
Scientists can make electrons travel from one atom to another. An atom that loses electrons is positively charged, an atom that gets more electrons is negatively charged