A sound wave has frequency 620 Hz and wavelength 10.5 m. What is the speed of sound waves?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

What is the relationship between the direction of motion of the balloon and the wind currents

What is a costume plot? why is it important to a film or theater production?