Diagnostic ultrasound of frequency 4.80 mhz is used to examine tumors in soft tissue.
(a) what is the wavelength in the air of such a sound wave?
(b) if the speed of sound in tissue is 1500m/s, what is the wavelength of this wave in tissue? (hint: the speed of sound wave in air is always 343m/s)

0.0000714583 m

0.0003125 m

Explanation:

v = Speed of sound in the medium

f = Frequency = 4.8 MHz

Wavelength is given by

Wavelength of the sound in air is 0.0000714583 m

Wavelength of the sound in the tissue is 0.0003125 m

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

b

explanation: