Question

TEST HELP PLEASE!! WILL GIVE MEDAL TO BEST ANSWER!!

1 When the air under the envelope is heated, the balloon lifts. Which of the following statements is true.
a. Hot air balloons use radiation to rise
b. Hot air balloons use conduction to rise
c. hot air balloons use convection to rise
d. hot air balloons use air resistance to rise


Is the answer answer C?,

Answer 1

C. Hot air balloons use convection to rise.

Answer 2

hot air balloons rise due to convection. Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. the transfer of heat from flame to air is the convection process.