Typically, neurons firing action potentials encode a signal’s intensity by a. changing the size of their action potentials. b. changing the frequency of their action potentials. c. firing at precise moments so as to signal different sized signals. d. sending signals of different sizes down different axonal branches. e. all of the above

b.. changing the frequency of their action potentials

Explanation:

Neurons encode the intensity of the stimulus in the frequency with which they fire.

Hence, the correct answer for neurons firing action potentials encode a signal’s intensity  is option B that is  changing the frequency of their action potentials

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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the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.