Aplane wave is incident on a boundary that separates two regions with int impedances 뀌-200 ω and 72-400ωκη0wing that the incident wave's electric nsi intensity has a magnitude of e, to 120 v/m, calculate the following quantities their names and units: intrinsic and give problem 4 (25 pts) a 2.2 ghz uniform plane wave is normally incident onto a freshwater lake (ε,-78, 4.1) determine the fraction of the incident power that is reflected. 4.2) determine the fraction of the incident power that is transmitted. 4.3) determine the amplitude of the electric field that is transmitted into the lake.

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

Which of the following are guidelines to follow for obtaining accurate observations