1) The formula for potential energy is PE = mgh, where mis mass, gis
the acceleration due to gravity, and his height. What additional trial
could the boys have performed to increase the distance that the block
travelled?

A)Increase the height of the bob drop

B)Shorten the string of pendulum bob

C)change the orientation of the block

D)Make a new bob of a different material

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;