The average human has a density of 945 kg/m3 after inhalation, and 1020 kg/m3 after exhalation. fresh water has a density of 1000 kg/3, sea water a density of about 1025 kg/m3, and the dead sea (which is actually a lake), a density of about 1230 kg/3. which of the following statements are true?
a. the human body has nearly the same density as salt water after exhaling.
b. the human body will always float in the dead sea.
c. a human would float in fresh water after exhaling

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.