Question 6 of 10 What are two ways in which ultrasound technology produces images?
A. By using sound in frequencies that reflect off body tissues
B. By measuring the time it takes for reflected sound waves to be
detected
C. By detecting the frequencies of emitted sound waves
D. By the absorption of sound waves in the body

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

cancer risk hope this

the answer is 12 as i may remember

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b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.