Two sinusoidal electromagnetic waves of the same angular frequency, ω = 110 rad/s, and oscillating in the same direction are emitted from the same location. the waves are emitted starting at times t1 and t2, respectively, with t2 later than t1 by t2 - t1 = 0.22 s. they are emitted with the same initial phase, φ = 2.1 rad, but have different amplitudes, a1 = 2.4 v/m and a2 = 5.5 v/m, respectively. the time dependence of the waves at their source has the form ei = ai cos(ωt+φ), where t denotes the elapsed time since the start of emission for each wave.

Why cooking gas has a typical smell

Which of the following is a source of heat for magma formation? magma plumes in the continental crust friction due to divergence friction due to subduction magma plumes in the oceanic crust

Part f - example: finding two forces (part i) two dimensional dynamics often involves solving for two unknown quantities in two separate equations describing the total force. the block in (figure 1) has a mass m=10kg and is being pulled by a force f on a table with coefficient of static friction îľs=0.3. four forces act on it: the applied force f (directed î¸=30â above the horizontal). the force of gravity fg=mg (directly down, where g=9.8m/s2). the normal force n (directly up). the force of static friction fs (directly left, opposing any potential motion). if we want to find the size of the force necessary to just barely overcome static friction (in which case fs=îľsn), we use the condition that the sum of the forces in both directions must be 0. using some basic trigonometry, we can write this condition out for the forces in both the horizontal and vertical directions, respectively, as: fcosî¸â’îľsn=0 fsinî¸+nâ’mg=0 in order to find the magnitude of force f, we have to solve a system of two equations with both f and the normal force n unknown. use the methods we have learned to find an expression for f in terms of m, g, î¸, and îľs (no n).