What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 degress C water to

flow through it at an average speed of 4.0 m/s?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.