As air heats up, air molecules occupy a larger area comparitively to cool air. To summerize, the ball will appear to be "more inflated."
They move faster and move farther apart
The charge density of the sheet is 1.384×10⁻⁷C/m².
Charge density is defined as the charge per unit area.
The sheet is a square of length l=17 cm.
Calculate the area A of the sheet .

The charge Q on the sheet is

The charge density σ is given by,

Substitute 4×10⁻⁹C for Q and 0.0289 m² for A.

Thus, the charge density of the sheet is <u>1.384×10⁻⁷C/m².</u>
The car has more inertia than the bike. Why? Because the car has a greater mass than the bicycle.