Which of the following statements is true?
Acool air is less dense than warm air.
BSound does not require a medium for travel.
CMagnetism is caused by the spinning motion of electrons.
DElectricity flows from positive to negative areas.
Acool air is less dense than warm air.
BSound does not require a medium for travel.
CMagnetism is caused by the spinning motion of electrons.
DElectricity flows from positive to negative areas.
