While testing speakers for a concert, tomás sets up two speakers to produce sound waves at the same frequency, which is between 100 hz and 150 hz. the two speakers vibrate in phase with each other. he notices that when he listens at certain locations, the sound is very soft (a minimum intensity compared to nearby points). one such point is 26.2 m from one speaker and 37.3 m from the other. (the speed of sound in air is 343 m/s.)

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Identical marbles are released from the same height on each of the following four frictionless ramps . compare the speed of the marbles at the end of each ramp. explain your reasoning

Which fators influence ocean currents