a simple harmonic oscillator of mass 0.03 kg is attached to a spring of force constant 90 N/m.The mass is parallel to a distance of 0.009 m and relesed to execute simple harmoni motion.calculate the time period of motion
Answers
Answer:
Explanation:
Ultrasound machines are used by medical professionals to make images for examining internal organs of the body. An ultrasound machine emits high-frequency sound waves, which reflect off the organs, and a computer receives the waves, using them to create a picture. We can use the formulas presented in this module to determine the frequency, based on what we know about oscillations. Consider a medical imaging device that produces ultrasound by oscillating with a period of
0.400
μ
s
. What is the frequency of this oscillation?
Strategy
The period (T) is given and we are asked to find frequency (f).
Solution
Substitute
0.400
μ
s
for T in
f
=
1
T
:
f
=
1
T
=
1
0.400
×
10
−
6
s
.
Solve to find
f
=
2.50
×
10
6
Hz
.
Significance
This frequency of sound is much higher than the highest frequency that humans can hear (the range of human hearing is 20 Hz to 20,000 Hz); therefore, it is called ultrasound. Appropriate oscillations at this frequency generate ultrasound used for noninvasive medical diagnoses, such as observations of a fetus in the womb.