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A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. The original activity of the sample was 1.20 Bq.
(a) Calculate the time constant for this isotope.(b) Calculate the activity of the sample after it has sat on the shelf for 2.40 h. Note that your value should be in the same units that you will select below.
Intuitively, the man will not catch the bus unless he is running fast enough. In mathematical terms, there is a constraint on the man's speed so that the equation above gives a solution for that is a real positive number.
A + 4.75 C and a -3.55uC charge are placed 18.5cm apart. Where can the third charge placed so that there is not a net force
A metal wire of resistance R is cut into five equal pieces that are then placed together side by side to form a new cable with a length equal to one-fifth the original length. What is the resistance of this new cable
On a horizontal axis attached a flywheel and lightweight pulley with radius of 5 cm. On the pulleh is reeled with a cord, to which is hanged a weight with mass of 0.4 kg.
On days of fair weather, the atmospheric electric field of the Earth is about 116 N/C; What is the surface charge density on the ground
A particle moves along the x-axis. Its position varies with time according to the expression x(t) = -6t + 5t2, where x is in meters and t is in seconds. Determine the displacement of the particle in the two time intervals t = 0 to t = 1 s and t = 1 s..
A 39.2-µF capacitor is connected across a 64.2-Hz generator. An inductor is then connected in parallel with the capacitor. What is the value of the inductance
A 45- traffic light is suspended from two steel cables of equal length and radii 0.58 . If each cable makes a 15 angle with the horizontal, what is the fractional increase in their length due to the weight of the light?
A thin soap film (n = 1.33) has the uniform thickness. When white light strikes the film at normal incidence, blue light (b = 440 nm) is constructively reflected.
A 700 MeV photon scatters off a free electron such that the scattering angle of the photon is twice the scattering angle of electron
Suppose a simple pendulum consists of a small weight (called apendulum bob) suspended from a 0.52-m-long string. If the pendulum bob were displaced to one side by a small angle and thenreleased,
An aluminum wire consists of the three segments. Current throughout = 6A J1=1.9E6-------J2=7.6E6------J3=1.9E6 Find the drift velocity for each J
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