Identify each of the following as a conductors or insulators

cloth

dry wood

tap water

glass

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

What is the length x of the side of the triangle below? (hint: use the cosine function)

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.