Gamma rays may be used to kill pathogens in ground beef. one irradiation facility uses a 60co source that has an activity of 1.0×106ci. 60co undergoes beta decay and then gives off two gamma rays, at 1.17 and 1.33 mev; typically 30% of this gamma-ray energy is absorbed by the meat. the dose required to kill all pathogens present in the beef is 4000 gy.

how many kilograms of meat per hour can be processed in this facility? express your answer in kilograms per hour.

Which of the following correctly describes the early view of catastrophism?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

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?