A hospital patient has been given a sample of 131I , which has a half-life of 8.04 days. This sample is decaying at 5.9 times the acceptable level for exposure to the general public
How long must the patient wait for the decay rate of the sample to reach the acceptable level? A) 21 days
B) 14 days
C) 9.9 days
D) 8.9 days
A
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Physically, why is a gas molecule’s speed v more likely to be near vp than near zero?
A. There are fewer quantum states with smaller speeds than larger speeds.
B. The Boltzmann factor has a larger value near v = vp than near v = 0.
C. We know that 
In designing buildings to be erected in an area prone to earthquakes, what relationship should the designer try to achieve between the natural frequencies of the building and the typical earthquake frequencies?
What will be an ideal response?
A runner generates 1260 W of thermal energy. If this energy has to be removed only by evaporation, how much water does this runner lose in 15 minutes of running? The latent heat of vaporization of water is 22.6 × 105 J/kg
A) 50 g B) 500 g C) 35 g D) 350 g E) 40 g
When a switch is closed allowing current to flow in coil A, the current induced in a nearby coaxial but unconnected coil B will flow
A. will keep flowing long after the current in A is shut off. B. steadily until the current flow in A is shutoff. C. will not flow at all since the coils are not connected. D. only momentarily and then stop.