"what factors determine the duration of the quasi-stable output pulse from a one-shot multivibrator? "

Ahowler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 4.6 km. assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 w/m2. what is the acoustic power emitted by the howler

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.