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a. A certain radioactive material emits gamma rays with energy 1 MeV. Another sample of radioactive material emits gamma rays with energy 10 keV. If both of these emit the same amount of energy per unit time, compare their activities.
b. A source of 198Au with a half-life of 2.69 days has an initial activity of 5 Ci. Calculate the activity after 4.0 days. Express this activity in Bq.
AC Output Resistance in Common Emitter Configuration Ratio of change in collector-emitter voltage (?V CE ) to the change in collector current (?I C ) at constant base curren
In an amusement park ride called The Roundup, passengers stand inside a 19.0 -diameter rotating ring. After the ring has acquired sufficient speed, it tilts into a vertical plane.
A worker lifts a 10 kilogram block a vertical height of 2 meters. The work he does on the block is: a) 5 Joules b) 20 Joules c) 49 Joules d) 200 Joules Ans:
What do you mean by the ratio of the frequency of fourth overtone to the fundamental frequency of a stretched string?
Q. Ski Saga Problem? James Bond is skiing down a snowy slope in an attempt to run off a hostile pursuer. Unfortunately the pursuer has a speed advantage since James is only abl
Draw the electric field figure as viewed by a person positioned on the positive x-axis who is looking back toward the origin for the case of an electric field characterized by the
How is coiled, twisted or roped fibers terminated? Generally terms the same techniques as with PMMA apply, because this optics are no more that 0,75mm diameter PMMA fibers bunc
Magnetic instruments are used to find out the magnetic moment of a bar magnet, find out the horizontal component of earth's magnetic field, compare the magnetic moments of two bar
One mole of an ideal gas at 0°C is compressed adiabatically reversibly to a pressure of 20 times its initial pressure. Evaluate the final temperature.(γ=1.4)
While music is on you will try to oppose the two ear phone pieces to attract. Task-I: Will they attract? If yes, why so?
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