Identify what is being described in each sentence ​

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

The ability to make things happen is also called a. heat b. force c. matter d. energy

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked