When an unpressurized aircraft's static pressure system is leak checked to comply with the requirements of section 91.411, what aircraft instrument may be used in lieu of a pitot-static system tester

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.