What are waves that require a medium to propagate known as?

a. transverse waves
b. mechanical waves
c. circular waves
d. electromagnetic waves

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Which terms describe the purpose of antennas on devices that use radio waves? transmit and receivemodify and amplifyamplify and receivemodify and transmit

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k