N° 2: Utrasound is a photographing technique stick uses ultrasounds. One of its applications is
blowing the powth of a fetus using sound waves of
Segexy 3 5 MHz
The speed of propagation of the sound waves in the
is of an order of 1500 m/s.
1) a) Justify whether the waves are audible by the fetus or not.
h) Specify the type of the waves,
c) Name the phenomenon on which this technique is based on?
2) a) Calculate the period of the wave used by ultrasound.
bi Determine the distance covered by this wave during one period. What does this
disance represent ?​

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

measure their densities same density, same sub

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft