What is determined by motion and the spacing of particles?

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.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

What is a possible result of higher air temperature caused by global warming