Jessica has two balls. one ball has a mass of 1 kg. other ball has a mass of 2 kg. she pushes each with a force of 100 n. how does the acceleration of the two balls compare

Aman pushes on a trunk with a force of 250 newtons. the trunk does not move. how much positive work is done on the trunk? 0.0 j -250 j 250 j 125 j

Which statement best describes how private industry decides where to spend the money on research and development

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.