Water How far away is a train if you see the steam from its nozzle 4.5 seconds
before you hear its sound? (Take speed of sound as 331 m/sec)

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

What is the relationship between the direction of motion of the balloon and the wind currents

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?