Question

Стеклянная пробка имеет внутри полость. нужно определить объем плотности,не разбивая пробки. можно ли это сделать с помощью весов,набора гирь и сосуда с водой .?

Answer 1

Смотрим в справочнике плотность стекла (r1 = 2,5 г/см3), находим с помощью мерного сосуда объём пробки (по увеличению уровня жидкости в сосуде после погружения в него пробки), пусть это будет V. Взвешиваем пробку на весах, находим её массу M. Далее определяем плотность R = M/V, т.е. M = m1+m2 (m1 - масса стекла, m2 - масса воздуха в пробке, ей можно пренебречь, т.е. M = m1), V = v1+v2 (v1 - объем стекла, v2 - искомый объём внутренней полости). Т.о. R = m1/(v1+v2), R(v1+v2)=m1 -> Rv1/m1 +Rv2/m1 = 1 -> v2 = m1/R(1-R/r1).

Answer 2

Determining the Volume and Density of a Sealed Glass Bottle

To determine the volume and density of a sealed glass bottle without breaking it, you can use a method involving a set of weights and a vessel of water. Here's how you can do it:

1. Method Using Weights and Water: - Fill a vessel with water and place it on a scale. - Record the initial weight of the vessel and water. - Carefully lower the sealed glass bottle into the water, ensuring it is fully submerged. - The water displaced by the bottle will cause the weight reading on the scale to increase. - Record the new weight reading. - The difference in weight before and after submerging the bottle represents the weight of the water displaced, which is equal to the volume of the bottle. - To find the density, you can then divide the weight of the bottle by its volume.

2. Cited Information: - According to Source "The volume of an object can be determined by measuring the amount of water it displaces when submerged." - Source also suggests that "The volume of an object can be determined by measuring the amount of water it displaces when submerged."

Using this method, you can determine the volume and density of the sealed glass bottle without the need to break it.