Which nucleus completes the following equation? 226/92 U → 4/2He+?
O A. 226/90 Th
O B. 222/92 U
O C. 222/90 Th
O D. 230/94 Pu

The stopwatch used by a student to measure velocity of a pulse in a slinky was of least count 0.1 second. he stops the stopwatch when a pulse has made 3 journeys from one end to the other of the slinky. he finds the seconds hand to be at 52nd division. calculate the correct time noted by him.