What is the maximum number of hours that good can be held in the danger zone?

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

Other than earth, is also known to have magnetic pole reversal? a: venus b: mars c: earths moon d: the sun