learner27

yeah i gigured that i should use this formula S=Vit+1/2at^2 or S= Vf^2-Vi^2/2a but i dont have the acceleration.. i dont know what to do

ohh.. yeah Sy is the y, meaning the length,, the ahmmm... the length yeah it is the length

Hello Guys thanks for opening up this topic so here it is: 1) An ultrasound scanner is being used as a sonar device to locate a metal fragment embedded in patient. The method is to produce a sound pulse and time the echo from the fragment (pulse-echo technique) if the sound speed in tissue is 1500m/s and the time from the pulse to echo is 4 microsecond , what is the depth of the fragment? When i analyzed this problem, i first thought about the Sy , as the one that is looking for, but im not really sure please help me guys thank you

thats ok sir, i finally understand it thank you so much for all the help!

ohh thank you!

thank you but, what if the problem is not asking for the conversion km/s to miles only? should i ignore the seconds?

OHH ! so thats how! you need to divide it ! thank you!

actually the whole problem is written on the "Homework" page named "Problem Solving" hope you can help me guys

no it is stated on the problem that we hace to convert from given unit to miles... sir can i ask... for example i will convert 40km/h to miles... should it be 24.84miles/sec?

Thank YOu So MUCH!

sir is this conversion now right? 40 km to miles and i got 24.84 miles/sec then 20 meters to miles = .01miles/sec then 60 ft to miles = .011miles/sec

ok 14.01 ? yeah im sorry sir can i have another question im having a difficulty on what is the formula that im going to use if the problem is looking for speed and displacement, what should i use on speed and what for displacement? because on my notes they have the same formula (when i ask my teacher, he wont answer me clearly)

3600 meters?? sir can u teach me how to convert units like that compound units im afraid that it will come out on our exam tomorrow i want to get high grade please teach me

I Have my new answers!!! please check them for me: a=11.04m b=14.76m/s^2 c=1.75sec. correct or still wrong?

3600 seconds sir and on ft.. .011 sir...