Consider an ionic compound, mxmx , composed of generic metal mm and generic, gaseous halogen xx . the enthalpy of formation of mxmx is δh∘f=−421δhf∘=−421 kj/mol. the enthalpy of sublimation of mm is δhsub=155δhsub=155 kj/mol. the ionization energy of mm is ie=401ie=401 kj/mol. the electron affinity of xx is δhea=−321δhea=−321 kj/mol. (refer to the hint). the bond energy of x2x2 is be=239be=239 kj/mol. determine the lattice energy of mxmx .

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

An alligator swims to the left with a constant velocity of 5 \,\dfrac{\text{m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction. when the alligator sees a bird straight ahead, the alligator speeds up with a constant acceleration of 3 \,\dfrac{\text {m}}{\text s^2}3 s 2 m ? 3, space, start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction leftward until it reaches a final velocity of 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction leftward. how many seconds does it take the alligator to speed up from 5 \,\dfrac{\text {m}}{\text s}5 s m ? 5, space, start fraction, m, divided by, s, end fraction to 35 \,\dfrac{\text {m}}{\text s}35 s m ? 35, space, start fraction, m, divided by, s, end fraction?

The slope of a velocity time graph over any interval of time gives the during that interval