A singer sings two notes. The first note is louder and lower in pitch than the second note. Which statement about the two notes is correct? A) The first note has a larger amplitude and a larger frequency than the second note

B) The first note has a larger amplitude and a smaller frequency than the second note.

C) The first note has a smaller amplitude and a larger frequency than the second note.

D) The first note has a smaller amplitude and a smaller frequency than the second note.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c