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Sound and Light Lesson Exam
5 A Science / Module 5
3. Which statements correctly describe sound? (Select all that apply.)
Sound waves behave in predictable ways.
All sound requires a medium through which to travel.
All sound can be heard by human ears.
Sound waves are compression waves that transfer energy in molecules.

beta decay is the answer

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.