When hot and cold air meet, the hot air rises to the top. which process causes the hot air to rise?

Which of the following are appropriate acceleration units?

You can decrease the resistance of a length of wire by

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe