The energy-time uncertainty principle allows for the creation of virtual particles, that appear from a vacuum for a very brief period of time Δ t, then disappear again. This can happen as long as ΔE Δt = ℏ/2, where Δ E is the rest energy of the particle.
(a) How long could an electron created from the vacuum exist according to the uncertainty principle?
(b) How long could a shot put with a mass of 7 kg created from the vacuum exist according to the uncertainty principle?