When the sound from two sound waves goes up and down (loud, soft, loud, soft) it makes a distinctive sound pattern called beats. these beats are caused by a difference in
select one:
a. formants.
b. frequencies.
c. wavelengths.
d. harmonics.

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

What equation is used to calculate the weight of an object on a plant ?

Part of a control linkage for an airplane consists of a rigid member cb and a flexible cable ab. if a force is applied to the end b of the member and causes it to rotate by θ = 0.5°, determine the normal strain in the cable. originally the cable is unstretched.