How does Doppler ultrasound technology differ from ultrasound technology that does not use the Doppler effect? A. Doppler ultrasound is based on absorption of sound, and other ultrasound technology is based on reflection.

B. Doppler ultrasound collects data from moving objects.

C. Doppler ultrasound creates images, but other ultrasound technology does not.

D. Other ultrasound technology creates images, but Doppler ultrasound does not.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.