What is the wavelength of a 340-Hz sound wave when the speed of the sound in air is 340
m/s?

Wavelength of sound wave = 1 m

Explanation:

Given

speed of sound wave = 340 m

frequency of sound wave = 340 Hz = 340

wavelength of sound wave = ?

We know that for all waves, the relationship between wavelength λ, frequency f and speed v is same and given by the equation:

v = fλ

Hence wavelength of sound wave λ = v/f

                                                             =  340 m / 340

                                                             = 1 m

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.