Which of the following equations represents Kepler's 3rd law, where P = orbital period and D = distance?
D: p^4=D^6
C : p=D^4
b. P^3 = D^2
a. P^2 = D^3

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. what gas in the atmosphere causes humidity? a) oxygen b) hydrogen c) nitrogen d) water vapor