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A vial containing 99mTc is labeled "75 kBq/ml at 12 am.
What volume should be withdrawn at 8 pm on the same day to prepare an injection of 50 kBq for a patient?
Given:
T1/2.25 days
A solar cell generates a potential difference of 0.320 V when a 445.0 ? resistor is connected across it and a potential difference of 0.504 V when a 945.0 ? resistor is substituted. What is the emf of the cell
A converging lens with a focal length of 6.20cm forms an image of a 3.80mm-tall real object that is to the left of the lens. Where are the object and image located
It is proposed that future space stations create an artificial gravity by rotating. What rotation period will provide "normal" gravity
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.4 m/s and the tension in the rope is T = 14.9 N. How long is the rope
A light bulb is placed 13.6 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, Calculate the focal length of the concave mirror
Calculate the surface-charge densities at an arbitrary point on the plane and on the boss, and sketch their behavior as a function of distance (or angle).
Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v0, At what time do the two cars collide?
A rectangular coil with 20 windings carries a current of 1.87 mA flowing in the counterclockwise direction. What torque must be applied to the loop to hold it steady
What is the minimum value of n for a subshell that has 25 electrons in it? If this subshell is in the n = 7 shell and assuming the minimum value of "I" above, what is the spectroscopic notation for this atom? (Answer using the format 2p3.)
A child loses his balloon, which rises slowly into the sky. If the balloon is 23 cm in diameter as the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension could be neglec..
A bullet with mass 5.44 g is fired horizontally into a 2.103-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
A child is sitting on a stationary skateboard with a pile of rocks which she throws in one direction in order to make the skateboard travel in the opposite direction. If the rocks each have a mass of 0.70 kg and she can throw them with a speed of 17 ..
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