Which of these can Waves transfer energy through?

All of the above

Liquids

Vacuums

Solids

Gasses

Adielectric-filled parallel-plate capacitor has plate area a = 30.0 cm2 , plate separation d = 9.00 mm and dielectric constant k = 3.00. the capacitor is connected to a battery that creates a constant voltage v = 15.0 v . throughout the problem, use ϵ0 = 8.85x10-12 c2/n.m2 . find the energy u1 of the dielectric-filled capacitor.

The inverse square law applies to: intensity of sound gravitational force intensity of light electric force magnetic force

How do the forces acting on a boat compare to the force acting on a plane ?