A microscope using suitable photons is employed to locate an electron in an atom within a distance of 0.1 Å. The uncertainty involved in the measurement of its velocity is-

1. 5.79×10⁶ m s^–1

2. 57.9×10⁶ m s^–1

3. 5.79×10⁷ m s^–1

4. 57.9×10⁷ m s^–1

A golf ball has a mass of 40g, and a speed of 45 m/s. If the speed can be measured within the accuracy of 2%, the uncertainty in the position is-

1. 1.46×10^–23 m

2. 14.6×10^–33 m

3. 1.46×10^–23 m

4. 1.46×10^–33 m