If the net work on an object by nonconsecutive force is zero then how does the final energy compare to the initial energy.

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.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?