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In a nuclear medicine scan using 99mTc, the image SNR for a 30-min scan was 50:1 for an injected radioactive dose of 1 mCi (3.7x10^7 disintegrations per second). Imaging began immediately after injection.
a) If the injected dose were doubled to 2 mCi, what would be the image SNR for a 30-min scan?
b) If the scan time were doubled to 60 min with an initial dose of 1 mCi, what would be the image SNR?
A sphere is spinning with a constant angular velocity. A 371 N force is applied at the axis of rotation. A rotating body has an angular acceleration of 9rad/s 2. A 3175 N force is applied 6 cm from the axis of rotation and is parallel to the lever ..
An unknown capacitor is charged by a 100-V source through a 1 M? resistor. determine the capacitance of the capacitor
a positive charge q1 is located to the left of a negative charge -q2. on a line passing through the two charges there
As noted above, the volume of a sphere is 4/3 pi^3. Write out an equivalent expression of this volume in terms of its diameter (d) since it is d that will be gauged: (an exercise in algebra)
The specific heat of granite is 0.80 kJ/kg x C. If 106 MJ of heat are added to a 100-kg granite statue of James Prescott Joule that is originally at 18 degrees C
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At rest when constructed, the ring is set rotating about its axis so that the people inside experience effective free-fall acceleration equal to g. The rotation is achieved by firing two small rockets attached tangentially to opposite points on the r..
The amplitude of a lightly damped oscillator decreases by 1.7% during each cycle. What percentage of the mechanical energy of the oscillator is lost
a jeweler needs to electroplate gold atomic mass 196.97 u onto a bracelet. he knows that the charge carriers in the
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