What instrument would scientist use to take measurements in the upper troposphere

a. x-ray monitor

b. ice core bore

c. weather balloon

d. underwater sonar

For which pair of objects would adding the same a

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Of is j/kg·k. if a 2.6 kg of isk to k,is ?