Question

The bond between protons and neutrons inside the atomic nucleus is formed by the strong interaction. In classical terms, we can think of it as protons and neutrons exchanging a "meson," a kind of fundamental particle between them. Let's estimate the range of the interaction that's caused by exchange of the π meson which has mass of approximately 2.5×10^-28 kg and decays. To do this, note that from the uncertainty principle one can estimate the lifetime t of a particle of mass m by t=ℏ/(2mc^2)where ℏ=1.05×10^-34 J/s is known as the (reduced) Planck's constant and c=3×10^8 m/s is the speed of light.

Express your answer in femtometers 1 fm=10^-15 m.

Details and assumptions
Nothing can travel faster than the speed of light.

Answer 1

0.700

Answer 2

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Distance= speed x time

Answer 3

nick, thank you so much

Answer 4

how do we calculate speed ? time i know