A little known fact is that both Robinson Crusoe and Friday woreeyeglasses. As it so happens, Robinson Crusoe was farsighted whileFriday was nearsighted. Whose eyeglasses did they use whenever theywanted to start a fire by focusing the Sun's rays?
A) Robinson Crusoe's
B) Friday's
C) Both would work equally well.
D) Both actually worked, but Friday's was a little bitbetter.
E) Neither's worked, they were in possession ofmatches.

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.