Which of the following statements is an accurate description of vibrations? a. ultrasonic vibrations have a frequency lower than the range for normal hearing b. infrasound vibrations are used in sonar equipment as well as to detect flaws in steel castings c. neither ultrasonic nor infrasonic vibrations can be heard by humans d. the frequency of infrasonic vibrations is much too high to be heard by humans

What are the 4 phases of matter in order of increasing engery content?

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

In which of the following phases of matter do molecules have the highest amount of energy? a. liquid b. gel c. solid d. gas