The pion (m? = 140 MeV/c2) is thought to be the particle exchanged in the nuclear force. What is the maximum range of this particle if its "time of existence" is as long as can be allowed by the uncertainty principle ?E??t = h/2?? (h/2? = 1.05 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 eV = 1.6 × 10^?19 J)
a. 1.2 × 10^?15 m
b. 1.4 × 10^?15 m
c. 2.0 × 10^?15 m
d. 7.5 × 10^?15 m
b
You might also like to view...
What does Hubble's law tell us?
A) The longer the period of a Cepheid variable, the greater its luminosity. B) The more distant a galaxy, the faster it is moving away from us. C) The faster a spiral galaxy's rotation speed, the more luminous it is. D) For every force, there is an equal and opposite reaction force.
In a therapeutic clinical trial, both the experimental group and the control group are composed of patients who have the disease for which a therapy is being tested.
a. true b. false
What actually "controls" Saturn's rings?
a. Saturn's magnetic field b. Saturn's tidal heating c. Saturn's moons d. Saturn's rapid rotation e. Saturn's metallic core
What is the angular momentum of the moon about the Earth? The mass of the moon is 7.35 × 10^22 kg, the center-to-center separation of the Earth and the moon is 3.84 × 10^5 km, and the orbital period of the moon is 27.3 days. Ignore the small offset of the center of mass of the system from the center of the Earth in your calculation