a lead object and a quartz object each have the same initial volume. The volume of each increases by the same amount because the temperature increases

How are calculation for velocity and speed different

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.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative