Which area on the line has both some kinetic energy and some gravitational energy?

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

How will the system respond to a temperature increase?