Which of the following refers to stored energy that an object has due to its height? A. Potential
B. Mechanical
C. Kinetic
D. Gravitational potential

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.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?