The photoelectric effect cannot demostrate that light can behave like a wave. It demostrates that light carries energy in quantas and that the packages of energy arrive in a kinetic manner proving that light behaves as a particle. The experiment that demostrates that light behaves like a particle as we as like a wave is the double-slit experiment mixed with the photoelectic particle.

**Answer:**

**<em> The momentum of the airplane = 604452 kgm/s</em>**

**Explanation:**

**Momentum:** This can be defined as the product of mass and velocity. The S.I unit of momentum is kgm/s.

Mathematically it is expressed as

M = mv ................................. Equation 1

Where, M = momentum of the air plane, m = mass of the airplane, v = velocity of the air plane.

<em>**Given: m = 3400 kg, v = 400 miles per hour**</em>

<em>**Conversion: 400(1600/3600) m/s = 177.78 m/s.**</em>

<em>Substituting into equation 1</em>

<em>M = 3400(177.78)</em>

<em>M = 604452 kgm/s.</em>

**<em>Thus the momentum of the airplane = 604452 kgm/s</em>**

It’s b because of how it’s answered