An arrow is launched straight up with a velocity of 12. 6 m/s. How long before the arrow returned to the ground?.

Give an example in which the electrical energy changes to light energy

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.

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false