What power of an engine is required to pump 2450n of water per second from a well 50m deep to the surface a. 2.45×10^3watts b. 2.45×10^4watts c. 2.45×10^5watts d. none of these

Which of the following are appropriate acceleration units?

The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a. is a south pole because the field hnes spread out from this end b. a north pole because the field lines spread out from this end c. a nouth pole because the field lines enter the magnet at this end d. is a north pole because the field lines enter the magnet at this end

If frequency goes up, what happens to wavelength? does it get shorter or longer?