If 1cm^2 of cardboard costs 0.01¢ and i needed 10.16cm of cardboard how much would the total be

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

Which transition by an electron will release the greatest amount of energy? oa ob oc od

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?