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A radioactive isotope is being produced at a constant rate dN/dt - R in an experiment.
a. The isotope has a half-life Show that after a time t >> t1/2, the number of active nuclei will become constant. Find the value of this constant.
b. Consider the situation of the previous problem. Suppose the production of the radioactive isotope starts at t = 0. Find the number of active nuclei at time t.
For a charged hollow metal sphere with total charge Q and radius R centered on the origin: Select "True" or "False" for each statement. 1. The field for r >> R will be the same as the field of a point charge, Q, at the origin 2. The field in the ho..
The celsius and fahrenheit temperature scales are two common ways to measure temperatures in very day situations.
Which of the folllowing are traveling faster than their terminal speed? Choose all that apply. A shooting star (meteor)A basketball at the moment it leaves theshooter's hands A penny, 16s after it has been dropped from the top of the Sears TowerA ..
a steel rod is used to transfer heat from a chamber at 300 k to a chamber at 250 k. which of the following changes in
A thin rectangular plate of uniform area density ?1 = 1.14 kg/m2 has a length a = 0.540 m and a width b = 0.230 m. find the distance from the origin of the resulting plate's center of mass
The length of a simple pendulum is 0.72 m, the pendulum bob has a mass of 295 g, and it is released at an angle of 12° to the vertical. What is the pendulum bob's speed when it passes through the lowest point of the swing
In civil aviation, a "standard turn" for level flight of apropeller driven airplane is one in which the airplane makes acomplete circular turn in 2 min. If the plane's speed is 168 m/s, what is the radius of the circle?
A plastic spring with spring constant 850 N/m has a relaxed length of 0.100 m. The spring is positioned vertically on a table, and a charged plastic 1.00-kg sphere is placed on the top end of the spring. Another charged object is suspended above the ..
if the battery in a circuit is taken out and the current becomes zero. how does the current remain zero without the battery
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
As a fish jumps vertically out of the water, assume that only two significant forces act on it: an upward force F exerted by the tail fin and the downward force due to gravity. What is the salmon acceleration
A horizontal wire of 0.52 m carrying a current of 8.2 A is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
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