As plants and animals decay, they release carbon dioxide. When CO2 dissolves in water, it creates carbonic acid. * 3 points
Which statement is correct about the cavern's formation?
Which statement is correct about the cavern's formation?
It was formed by physical weathering because the structure's appearance has changed over time due to chemical changes.
It was formed by physical weathering because the structure's appearance has changed over time due to abrasion.
It was formed by chemical weathering because the structure's appearance has changed over time due to abrasion.
It was formed by chemical weathering because the structure's appearance has changed over time due to chemical changes.

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.