Propane (c3h8) burns in oxygen to produce carbon dioxide gas and water vapor. (a) write a balanced equation for this reaction. (use the lowest possible coefficients. include states-of-matter under the given conditions in your answer.)

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.