What was operation overlord?
a. the code name for the allied invasion of normandy
b. the code name for the axis invasion of france
c. the code name for the project to build atomic bomb
d. the code name for the project to build nuclear submarine

What do you think car designers do if the damage caused by a crash test is too severe?

If a balloon is taken outside on a very cold day, what will occur?

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.