19. Geological evidence indicates there was once a warm tropical climate in what is
now New York State. Other evidence
shows that millions of years later, huge
ice sheets covered the state.
Which of the following statements can be
concluded from the information above?
(1) Climates of the future will always be
as they are today.
(2) The size and shape of the oceans
remain constant through time.
(3) Glaciers are limited to the polar
regions.
(4) There have been considerable
climatic fluctuations in the past.
(5) An ice age always follows a period of
tropical climatic conditions.

Which term best describes the phrase “something that happens”?

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?

What are some properties of transverse waves?