Aturbine is spinning at 3400 rpm. friction in the bearings is so low that it takes 16 min to coast to a stop. how many revolutions does the turbine make while stopping?

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.