Sources a and b emit long-range radio waves of wavelength 360 m, with the phase of the emission from a ahead of that from source b by 90°. the distance ra from a to a detector is greater than the corresponding distance rb from b by 150 m. what is the magnitude of the phase difference at the detector?

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

What was the first instrument to ever record an earthquake?