A thin uniform tube 40cm long, open at both ends, is immersed in mercury about half its length. Now close the top corner and remove it vertically from the mercury. If the length of the remaining mercury in the tube is 15cm, what is the atmospheric pressure of mercury in cm? answers:

1.72 2.73 3.74 4.75 5.76

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Question 1(multiple choice worth 2 points) in order to be considered work, the components that must be present are • a force and a movement in the same direction as the force an action which causes movement and an opposite reaction an action which causes no movement or reaction a force and a movement in the opposite direction of the force