That's true. The only way to stop an object from radiating energy
is to cool it to absolute zero. Since the temperature of space is
roughly 3 degrees above absolute zero, the atoms or molecules
of every object have some kinetic energy, and the object radiates
some heat.
Of course it also absorbs heat at the same time, mostly from the
huge number of stars shining on it.
The solution for the problem is:
Wavelength = Planck’s constant/(mass*velocity)
Planck’s constant= 6.63*10^-34 with units of J-s or kg-m^2/s^2-s
mass = 149g = 0.149 kg
velocity = 95.4.mi/1hr(1609.3m/1mi)(1hr/3600sec) = 42.65m/s
h/mv = 6.63*10^-34 kg-m^2/s^2-s/(42.65m/s*0.149kg)
wavelength = 1.04 *10^-34 m
Answer:
The particle momentum, p
Explanation:
A particle's de Broglie's wavelength is an indication of the scale in length where the particle's wave-like properties are important. The symbol of de Broglie wavelength is λ or
given as follows;
The de Broglie's wavelength formula is given as follows;

Where;
λ = The wavelength of the particle in meters
v = The velocity of the particle in meters/seconds
m = The mass of the particle in kilograms
p = The momentum of the particle
h = Planck's constant = 6.626 × 10⁻³⁴ J/Hz
Therefore, the alternative value that we must have to successfully determine the wavelength if the mass and velocity are unknown, is the momentum, p of the particle.