How does the doppler effect determine which way blood flows during an ultrasound?

if the forces acting on an object are unbalanced, the object will accelerate in the direction of the net force on the object.

explanation:

this is best explained by having an understanding of newton's second law, which states that f=ma. you see, when the forces are unbalanced, net force (sum of all forces) is not zero. therefore making it necessary for the object to have an acceleration in the direction of the net force.

i would say the answer is food.

hope this !

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.