The uncertainty in position of a proton confined to the nucleus of an atom is roughly the diameter of the nucleus. if this diameter is 7.8x10^-15 m, what is the uncertainty in the proton's momentum? express your answer using two significant figures.

Six pendulums of mass mand length las shown are released from rest at the same angle theta from vertical. rank the pendulums according to the numberof complete cycles of motion each pendulum goes through perminute. a. l= 1m m=2kg b. l= 4m m=1 kg c. l= 2 m m= 2 kg d. l= 1 m m= 4 kg e. l= 2 m m = 4 kg f. l= 4m m = 4kg