Why is an air mass unlikely to form over the rocky mountains of north america?

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

How are positive ions different from neutral atoms

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.