19. a person goes to the doctor and will need a 3-month prescription of medicine. the person will be required to take 3 pills per day. how many pills will the doctor write the prescription for assuming there are 30 days in a month?

Awoman stands a distance d from a loud motor that emits sound uniformly in all directions. the sound intensity at her position is an uncomfortable 2.0×10-3 w/m2. at a distance 2.6 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?

Blank liquids and gases exert a buoyant force on objects placed in them

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).