Physics, 05.01.2021 16:20 Totototono
У залізній коробці масою 300 г хлопчик розплавив 200 г олова. Яка кількість теплоти пішла на нагрівання коробки, якщо початкова температура їх була 32оС? Температура плавлення олова 232оС. Питома теплоємність заліза 460 Дж/кг*С. Відповідь подайте у Дж.
Answers: 3
Physics, 21.06.2019 22:30
Select the word from the list that best fits the definition classification of most stars on the h-r diagram
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Physics, 22.06.2019 05:50
Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.
Answers: 2
Physics, 22.06.2019 06:30
Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?
Answers: 1
Physics, 22.06.2019 06:30
=force × distance a. work b. velocity c. pressure d. momentum
Answers: 1
У залізній коробці масою 300 г хлопчик розплавив 200 г олова. Яка кількість теплоти пішла на нагріва...
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