When is a ambulance siren the loudest?

What’s #16 asking me and how do i solve it?

Convection occurs when thermal energy is transferred by the movement of

Which of the following is a characteristic shared by both electron and light microscopes? a. they both employ the use of objective lenses. b. both microscopes require an internal camera to visualize the specimen. c. both microscopes have a resolving power of 0.01 nm. d. they both utilize white light to magnify the specimen.