Two loudspeakers are 2.0 m apart and in phase with each other. Both emit 700 Hz sound waves into a room where the speed of sound is 342 m/s. A listener stands 5.0 m in front of the loudspeakers and 2.0 m to one side of the center as shown in Figure Q2. i. Is the interference at this point constructive, destructive or something in between? Explain.
ii. How will the situation differ if the loudspeakers are out of phase?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?