Can someone help me solve number 3 for chemical equations?

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.

Which lists the organs in the correct order as food passes from the mouth to anus?

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery