(a) a proton is confined to the nucleus of an atom. assume the nucleus has diameter 5.5 x 10-15 m and that this distance is the uncertainty in the proton's position. what is the minimum uncertainty in the momentum of the proton? dpmin = kg-m/s
(b) an electron is confined in an atom. assume the atom has diameter 1 x 10-10 m and that this distance is the uncertainty in the electron's position. what is the minimum uncertainty in the momentum of the electron?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s