8. A wave pattern formed 3 seconds after a pebble is dropped into a pond is shown below, 0/12m (a) How many waves were formed in 3 seconds? (b) What was the frequency of the waves? (c) What was the wavelength of the waves? d) Calculate the speed of the waves.​

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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d is the correct answer

the answer is a)

mark brainliest

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!