PLZ PLZ HELP I WILL MARK BRAINLEST! PLZ DUE RIGHT NOW 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. antis

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

How to tell if a molecule is polar or nonpolar with electronegativity

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.