Calculate the minimum frequency of ultrasound (in Hz) that will allow you to see details as small as 0.496 mm in human tissue. (Assume the speed of sound through human tissue is 1540 m/s). What is the effective depth to which this sound is effective as a diagnostic probe?

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

What does si stand for,when referring to a system of measurement