MY EXPERIENCE WITH LEARNING PHYSICS ONLINE; Is this Heisenberg's Uncertainty Principle? ∆x∆p=h/4π; Yep; And the problem gave us ∆x=1.75 meters, and mass = 10 grams, correct? Yep; So, I substituted ∆p for m∆v, and plugged in 0.01kg for the mass, m. The resulting formula gave me ∆v = 3.01306x10^-33 m/s. That makes sense to me. Then take it. That's not the right answer