20 cm
Not enough information in the question to answer it.
Well, you have to give us a figure, -there are dozens of sizes.
The length of a water bottle rocket can vary depending on the size and design of the bottle used. On average, a typical water bottle rocket is around 2 feet (60 cm) in length.
He is 184 cm tall.
To make a Cartesian diver, you can use a small plastic bottle with a cap, fill it with water, and then partially squeeze it to create an air bubble. When you place the diver in a larger container of water and cap it, squeezing the bottle will change the pressure inside, causing the diver to sink or float.
157.48 centimeters tall.
182.9 cm tall.
6 cm tall
The cube of water would have a greater density because it has a mass of 1g in a smaller volume of 1 cm³, resulting in a density of 1 g/cm³. The block of plastic has a mass of 4g in a larger volume of 6 cm³, resulting in a density of 0.67 g/cm³.
The mass of a bottle of mineral water can vary depending on the size and amount of water it contains. On average, a standard 16.9 oz (500 ml) bottle of mineral water weighs around 500 grams (1.1 pounds).
At age 77 you will be 181 cm.