Convection ovens are ovens that are advertised to cook food more evenly than a standard thermal oven. Which statement best explains how a convection oven works?
a Hot air is transferred through density differences with cool air rising and hot air sinking.
b Hot air is transferred through molecule to molecule contact.
c Hot air is transferred through heat being radiated from a thermal burner.
d Hot air is transferred through density differences with hot air rising and cool air sinking.
d Hot air is transferred through density differences with hot air rising and cool air sinking.
A student walks downstairs to class. Which statement correctly describes the types of energy the student has at the top of the stairs and as she walks down the stairs?
a kinetic energy at the top of the stairs; potential energy as she walks down
b kinetic energy at the top of the stairs; kinetic energy as she walks down
c potential energy at the top of the stairs; kinetic energy as she walks down
d potential energy at the top of the stairs; potential energy as she walks down