In which disorder does a person find it difficult to fall asleep or stay asleep for a long time? A.
somnambulism
B.
narcolepsy
C.
insomnia
D.
sleep apnea

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

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is