As a roller-coaster car starts down a slope, its speed is 4 m/s. But 3 seconds later, at the bottom, its speed is 22 m/s. What is its average acceleration? Question 1 options:

A. 6 meters/second2
B. 4 meters/second2
C. 3 meters/second2
D. 2 meters/second2

eukarya because is is like alche and b is bacteria and d is animals

explanation:

about 40,000,000 results (0.81 seconds)  

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

idk lol use google m8