Answer:
The electrical force between two balloons is 67.5N.
Explanation:
There are two charged balloons, let's say a and b.
The charge on the balloon a = C
The charge on the balloon b = C
Both balloons are 1 cm apart; it means that the distance<em> r</em> between the balloon a and the balloon b is 0.01 m (since 1 cm = 0.01 m).
We need to find the electrical force between them. By using the Coulomb's law, the magnitude of the electrical force between both the balloon is given as follows:
--- (A)
Where,
k = Coulomb's constant = =
Plug all the values in the equation (A):
Hence, the electrical force between two balloons is 67.5N (three significant figures).
Volume of cube = Length x width x height
= 1 x 1 x 1
= 1 cm cubed.
If this cube is dropped into 28.0 ML of water the new volume reading onthe graduated cylinder = 1 + 28
= 29 mL
These are super difficult for me btw in which grade do u study