Particle a has very little mass in comparison to particle b. both particles are in the same atom. which is the best conclusion about particles a and b?

What does si stand for,when referring to a system of measurement

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

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.