A 15 GHz signal is injected into a vacuum-filled, copper Ku-band waveguide. The waveguide is connected to another Ku-Band waveguide, but this one is filled with polyethylene (assume semi-infinite waveguides). Design a quarter-wavelength matching section to eliminate reflections from this configuration. Draw a picture of the system (the three waveguide sections) and label all relevant dimensions and values.

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

If a sphere and a cure have the same mass and are propelled up a ramp with the same force, which would travel father up the ramp? explain.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.