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Problem: Many medical PET scans use the isotope 18F, which has a half-life of 1.8hr. A sample prepared at 10:00 a.m. has an activity of 20mCi.
Part I: What is the activity at 1:00 p.m., when the patient is injected?
I would really appreciate some help for above problem and express your answer using two significant figures.
If you see the displayed waveform on an oscilloscope screen,given that voltage scale is 50 millivolt/division, and the timescale is 100 milliseconds/div: What is the frequency of this oscillation?
A rectangular coil composed of 58 turns of wire has an area of 16 cm2 and carries a current of 2.1 Amp. Calculate the magnitude of the magnetic field
A particular organ pipe can resonate at 264 Hz, 440 Hz, and 616 Hz, however not at any other frequencies between 264 and 616 Hz. (a) Is this an open or closed pipe? (b) What is the fundamental frequency of this pipe?
you are given three resistors each of 10 kq and a 9-v battery whose negative terminal is connected to ground. witha
An interstate highway has been built through a neighborhood in a city. In the afternoon, What is the average late-night sound level
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A light bulb is connected to a 240-V wall socket. The current in the bulb depends on the time t according to the relation I = (2.828 A) sin[(596.6 Hz)t].Determine the resistance of the bulb's filament
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