Technician a says that temperature sensors decrease in resistance as the temperature increases; this is called positive temperature coefficient (ptc). technician b says that some vehicle manufacturers use a stepped ect circuit inside the pcm to broaden the accuracy of the sensor. who is right?

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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need to see circuit to get time constant

a.   mass number from atomic number

wavelength divides in half and speed stays the same.