wavelength????

Question

if a certain automobile of mass 1520 kg travels on a german autobahn at 210 km/h. what is the wavelength of the automobile in m?

Answer 1

The first person to answer is retarded. The guy directly above me is VERY close, but still a little off. He's conceptually correct, since the wavelength WILL be really small, since the car's mass is big. However, he gave the wrong formula. Haven't you guys ever heard about wave/particle duality. All particles have wave-like characteristics (like a wavelength), and all waves have particle-like characteritics (like momentum). All these characteristics are related to each other by de Broglie's equation: "λ = h/p," where "λ" is wavelength, "h" is Planck's constant, and "p" is momentum, which is the product of mass and velocity (m & v).

First, you convert 210 km/h to 58.3 m/s

Then, you just plug numbers in:

λ = h/p

λ = h/mv

λ = (6.63 x 10^(34))/(1520)(58.3)

λ = 7.48 x 10^(-39) m

Answer 2

Much much smaller than infinitesimal. You can figure the wavelength from the kinetic energy and Planck's constant using lambda = h/E, but E is large, and h is REALLY small. The idea of the problem is to show that quantum mechanics has no visible effect in the macroscopic world.

Answer 3

the person above me is definately right, just to let u no. but hes a big head calling the first person retarded, he himself probably is, as what he told u was so simple, u learn that at 16 in england, but peeps can get confused with it :)